.ipynb .pdf

Contents

Interactive plots with Ipyleaflet

Overview:

1. Interactively display images from remote map servers with ipyleaflet

2. Overlay gridded data on the interactive map

Older Enivronment Note that we are using an older Python 3 environment in this notebook! The ipyleaflet package is currently incompatible with the version of Jupyterlab that we have been using this semester.

Prerequisites

Concepts	Importance	Notes
Contextily
Xarray

• Time to learn: 20 minutes

---

Imports

from datetime import datetime, timedelta
from ipyleaflet import Map, TileLayer, basemaps, basemap_to_tiles
from ipyleaflet.velocity import Velocity
import xarray as xr

Interactively display images from remote map servers with ipyleaflet

While we’ve made some nice looking maps so far in the course, they are all static images … i.e., they can only be viewed … not interacted with. Most of us have browsed interactive map-based websites, such as Google Maps, where we can use our mouse or touch-enabled screen to move around, zoom in or out, or otherwise intereact with the plot. The Javascript programming language is what makes this interactivity possible. Here, we will use a Python package, ipyleaflet, as a “bridge” to Javascript.

Note: The "leaflet" in ipyleaflet refers to the Leaflet open-source Javascript library.

Use a satellite composite as the base image.

Now, specify an image tile server and product, using the same sources as those provided by Contextily. Center the map and specify a zoom level.

Create time strings

We’ll need to select a date and time, and then pass in date/time objects or strings to various functions below; their format will be function-specific.

timeObj = datetime(2024,4,25,0)
timeStr1 = timeObj.strftime("%Y-%m-%d")
timeStr2 = timeObj.strftime("%Y%m%d_%H%M")

timeStr2

'20240425_0000'

m = Map(
    basemap=basemap_to_tiles(basemaps.NASAGIBS.ModisTerraTrueColorCR, timeStr1),
    center=(42.204793, -74.121558),
    zoom=4
)

m

Add a background cartographic layer.

We’ll use ipyleaflet’s add_layer method. We simply add another remote tile server. The default opacity is 1.0, so reduce that a bit so we still see the satellite layer.

basemapLayer = basemap_to_tiles(basemaps.CartoDB.Positron,opacity=0.5)
m.add_layer(basemapLayer)

Interact with the dynamic map

Zoom in and out with the +/- buttons to see both layers dynamically update.

Overlay gridded data on the interactive map

We will display an animated wind velocity flow field, a la https://earth.nullschool.net or https://www.windy.com/.

Note: ipyleaflet can read in Xarray DataArray objects so we will exploit that here.

Read in a dataset based on the 0.5-degree resolution GFS on a given date and time.

ds = xr.open_dataset('https://thredds.ucar.edu/thredds/dodsC/grib/NCEP/GFS/Global_0p5deg_ana/GFS_Global_0p5deg_ana_'+ timeStr2 +'.grib2')

Examine the dataset

ds

<xarray.Dataset>
Dimensions:                                                          (lat: 361,
                                                                      lon: 720,
                                                                      time: 1,
                                                                      altitude_above_msl: 3,
                                                                      sigma_layer: 4,
                                                                      pressure_difference_layer: 1,
                                                                      ...
                                                                      sigma: 1,
                                                                      pressure_difference_layer1: 1,
                                                                      hybrid: 1,
                                                                      sigma_layer_bounds_1: 2,
                                                                      pressure_difference_layer_bounds_1: 2,
                                                                      pressure_difference_layer1_bounds_1: 2)
Coordinates: (12/15)
  * lat                                                              (lat) float32 ...
  * lon                                                              (lon) float32 ...
    reftime                                                          datetime64[ns] ...
  * time                                                             (time) datetime64[ns] ...
  * altitude_above_msl                                               (altitude_above_msl) float32 ...
  * sigma_layer                                                      (sigma_layer) float32 ...
    ...                                                               ...
  * height_above_ground                                              (height_above_ground) float32 ...
  * potential_vorticity_surface                                      (potential_vorticity_surface) float32 ...
  * height_above_ground1                                             (height_above_ground1) float32 ...
  * sigma                                                            (sigma) float32 ...
  * pressure_difference_layer1                                       (pressure_difference_layer1) float32 ...
  * hybrid                                                           (hybrid) float32 ...
Dimensions without coordinates: sigma_layer_bounds_1,
                                pressure_difference_layer_bounds_1,
                                pressure_difference_layer1_bounds_1
Data variables: (12/83)
    LatLon_Projection                                                int32 ...
    sigma_layer_bounds                                               (sigma_layer, sigma_layer_bounds_1) float32 ...
    pressure_difference_layer_bounds                                 (pressure_difference_layer, pressure_difference_layer_bounds_1) float32 ...
    pressure_difference_layer1_bounds                                (pressure_difference_layer1, pressure_difference_layer1_bounds_1) float32 ...
    Absolute_vorticity_isobaric                                      (time, isobaric, lat, lon) float32 ...
    Cloud_mixing_ratio_hybrid                                        (time, hybrid, lat, lon) float32 ...
    ...                                                               ...
    v-component_of_wind_potential_vorticity_surface                  (time, potential_vorticity_surface, lat, lon) float32 ...
    v-component_of_wind_altitude_above_msl                           (time, altitude_above_msl, lat, lon) float32 ...
    v-component_of_wind_maximum_wind                                 (time, lat, lon) float32 ...
    v-component_of_wind_height_above_ground                          (time, height_above_ground1, lat, lon) float32 ...
    v-component_of_wind_tropopause                                   (time, lat, lon) float32 ...
    v-component_of_wind_sigma                                        (time, sigma, lat, lon) float32 ...
Attributes:
    Originating_or_generating_Center:                                        ...
    Originating_or_generating_Subcenter:                                     ...
    GRIB_table_version:                                                      ...
    Type_of_generating_process:                                              ...
    Analysis_or_forecast_generating_process_identifier_defined_by_originating...
    file_format:                                                             ...
    Conventions:                                                             ...
    history:                                                                 ...
    featureType:                                                             ...
    _CoordSysBuilder:                                                        ...

xarray.Dataset

• Dimensions:
  • lat: 361
  • lon: 720
  • time: 1
  • altitude_above_msl: 3
  • sigma_layer: 4
  • pressure_difference_layer: 1
  • isobaric: 41
  • isobaric1: 22
  • height_above_ground: 2
  • potential_vorticity_surface: 2
  • height_above_ground1: 6
  • sigma: 1
  • pressure_difference_layer1: 1
  • hybrid: 1
  • sigma_layer_bounds_1: 2
  • pressure_difference_layer_bounds_1: 2
  • pressure_difference_layer1_bounds_1: 2
• Coordinates: (15)
  • lat
    (lat)
    float32
    90.0 89.5 89.0 ... -89.5 -90.0

    units :

    degrees_north

    _CoordinateAxisType :

    Lat

    array([ 90. ,  89.5,  89. , ..., -89. , -89.5, -90. ], dtype=float32)

  • lon
    (lon)
    float32
    0.0 0.5 1.0 ... 358.5 359.0 359.5

    units :

    degrees_east

    _CoordinateAxisType :

    Lon

    array([  0. ,   0.5,   1. , ..., 358.5, 359. , 359.5], dtype=float32)

  • reftime
    ()
    datetime64[ns]
    ...

    standard_name :

    forecast_reference_time

    long_name :

    GRIB reference time

    _CoordinateAxisType :

    RunTime

    [1 values with dtype=datetime64[ns]]

  • time
    (time)
    datetime64[ns]
    2024-04-25

    standard_name :

    time

    long_name :

    GRIB forecast or observation time

    _CoordinateAxisType :

    Time

    array(['2024-04-25T00:00:00.000000000'], dtype='datetime64[ns]')

  • altitude_above_msl
    (altitude_above_msl)
    float32
    1.829e+03 2.743e+03 3.658e+03

    units :

    m

    long_name :

    Specific altitude above mean sea level

    positive :

    up

    Grib_level_type :

    102

    datum :

    mean sea level

    _CoordinateAxisType :

    Height

    _CoordinateZisPositive :

    up

    array([1829., 2743., 3658.], dtype=float32)

  • sigma_layer
    (sigma_layer)
    float32
    0.58 0.665 0.72 0.83

    units :

    sigma

    long_name :

    Sigma level

    positive :

    down

    Grib_level_type :

    104

    bounds :

    sigma_layer_bounds

    _CoordinateAxisType :

    GeoZ

    _CoordinateZisPositive :

    down

    array([0.58 , 0.665, 0.72 , 0.83 ], dtype=float32)

  • pressure_difference_layer
    (pressure_difference_layer)
    float32
    9e+03

    units :

    Pa

    long_name :

    Level at specified pressure difference from ground to level

    positive :

    up

    Grib_level_type :

    108

    datum :

    ground

    bounds :

    pressure_difference_layer_bounds

    _CoordinateAxisType :

    Pressure

    _CoordinateZisPositive :

    up

    array([9000.], dtype=float32)

  • isobaric
    (isobaric)
    float32
    1.0 2.0 4.0 ... 9.75e+04 1e+05

    units :

    Pa

    long_name :

    Isobaric surface

    positive :

    down

    Grib_level_type :

    100

    _CoordinateAxisType :

    Pressure

    _CoordinateZisPositive :

    down

    array([1.00e+00, 2.00e+00, 4.00e+00, 7.00e+00, 1.00e+01, 2.00e+01, 4.00e+01,
           7.00e+01, 1.00e+02, 2.00e+02, 3.00e+02, 5.00e+02, 7.00e+02, 1.00e+03,
           1.50e+03, 2.00e+03, 3.00e+03, 4.00e+03, 5.00e+03, 7.00e+03, 1.00e+04,
           1.50e+04, 2.00e+04, 2.50e+04, 3.00e+04, 3.50e+04, 4.00e+04, 4.50e+04,
           5.00e+04, 5.50e+04, 6.00e+04, 6.50e+04, 7.00e+04, 7.50e+04, 8.00e+04,
           8.50e+04, 9.00e+04, 9.25e+04, 9.50e+04, 9.75e+04, 1.00e+05],
          dtype=float32)

  • isobaric1
    (isobaric1)
    float32
    5e+03 1e+04 ... 9.75e+04 1e+05

    units :

    Pa

    long_name :

    Isobaric surface

    positive :

    down

    Grib_level_type :

    100

    _CoordinateAxisType :

    Pressure

    _CoordinateZisPositive :

    down

    array([  5000.,  10000.,  15000.,  20000.,  25000.,  30000.,  35000.,  40000.,
            45000.,  50000.,  55000.,  60000.,  65000.,  70000.,  75000.,  80000.,
            85000.,  90000.,  92500.,  95000.,  97500., 100000.], dtype=float32)

  • height_above_ground
    (height_above_ground)
    float32
    80.0 100.0

    units :

    m

    long_name :

    Specified height level above ground

    positive :

    up

    Grib_level_type :

    103

    datum :

    ground

    _CoordinateAxisType :

    Height

    _CoordinateZisPositive :

    up

    array([ 80., 100.], dtype=float32)

  • potential_vorticity_surface
    (potential_vorticity_surface)
    float32
    -2e-06 2e-06

    units :

    K m2 kg-1 s-1

    long_name :

    Potential vorticity surface

    positive :

    up

    Grib_level_type :

    109

    _CoordinateAxisType :

    GeoZ

    _CoordinateZisPositive :

    up

    array([-2.e-06,  2.e-06], dtype=float32)

  • height_above_ground1
    (height_above_ground1)
    float32
    20.0 30.0 40.0 50.0 80.0 100.0

    units :

    m

    long_name :

    Specified height level above ground

    positive :

    up

    Grib_level_type :

    103

    datum :

    ground

    _CoordinateAxisType :

    Height

    _CoordinateZisPositive :

    up

    array([ 20.,  30.,  40.,  50.,  80., 100.], dtype=float32)

  • sigma
    (sigma)
    float32
    0.995

    units :

    sigma

    long_name :

    Sigma level

    positive :

    down

    Grib_level_type :

    104

    _CoordinateAxisType :

    GeoZ

    _CoordinateZisPositive :

    down

    array([0.995], dtype=float32)

  • pressure_difference_layer1
    (pressure_difference_layer1)
    float32
    1.5e+03

    units :

    Pa

    long_name :

    Level at specified pressure difference from ground to level

    positive :

    up

    Grib_level_type :

    108

    datum :

    ground

    bounds :

    pressure_difference_layer1_bounds

    _CoordinateAxisType :

    Pressure

    _CoordinateZisPositive :

    up

    array([1500.], dtype=float32)

  • hybrid
    (hybrid)
    float32
    1.0

    units :

    sigma

    long_name :

    Hybrid level

    positive :

    down

    Grib_level_type :

    105

    _CoordinateAxisType :

    GeoZ

    _CoordinateZisPositive :

    down

    array([1.], dtype=float32)

• Data variables: (83)
  • LatLon_Projection
    ()
    int32
    ...

    grid_mapping_name :

    latitude_longitude

    earth_radius :

    6371229.0

    _CoordinateTransformType :

    Projection

    _CoordinateAxisTypes :

    Lat Lon

    [1 values with dtype=int32]

  • sigma_layer_bounds
    (sigma_layer, sigma_layer_bounds_1)
    float32
    ...

    units :

    sigma

    long_name :

    bounds for sigma_layer

    [8 values with dtype=float32]

  • pressure_difference_layer_bounds
    (pressure_difference_layer, pressure_difference_layer_bounds_1)
    float32
    ...

    units :

    Pa

    long_name :

    bounds for pressure_difference_layer

    [2 values with dtype=float32]

  • pressure_difference_layer1_bounds
    (pressure_difference_layer1, pressure_difference_layer1_bounds_1)
    float32
    ...

    units :

    Pa

    long_name :

    bounds for pressure_difference_layer1

    [2 values with dtype=float32]

  • Absolute_vorticity_isobaric
    (time, isobaric, lat, lon)
    float32
    ...

    long_name :

    Absolute vorticity @ Isobaric surface

    units :

    1/s

    abbreviation :

    ABSV

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-2-10_L100

    Grib2_Parameter :

    [ 0 2 10]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Momentum

    Grib2_Parameter_Name :

    Absolute vorticity

    Grib2_Level_Type :

    100

    Grib2_Level_Desc :

    Isobaric surface

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [10656720 values with dtype=float32]

  • Cloud_mixing_ratio_hybrid
    (time, hybrid, lat, lon)
    float32
    ...

    long_name :

    Cloud mixing ratio @ Hybrid level

    units :

    kg/kg

    abbreviation :

    CLWMR

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-1-22_L105

    Grib2_Parameter :

    [ 0 1 22]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Moisture

    Grib2_Parameter_Name :

    Cloud mixing ratio

    Grib2_Level_Type :

    105

    Grib2_Level_Desc :

    Hybrid level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Cloud_mixing_ratio_isobaric
    (time, isobaric1, lat, lon)
    float32
    ...

    long_name :

    Cloud mixing ratio @ Isobaric surface

    units :

    kg/kg

    abbreviation :

    CLWMR

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-1-22_L100

    Grib2_Parameter :

    [ 0 1 22]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Moisture

    Grib2_Parameter_Name :

    Cloud mixing ratio

    Grib2_Level_Type :

    100

    Grib2_Level_Desc :

    Isobaric surface

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [5718240 values with dtype=float32]

  • Cloud_water_entire_atmosphere_single_layer
    (time, lat, lon)
    float32
    ...

    long_name :

    Cloud water @ Entire atmosphere layer

    units :

    kg.m-2

    abbreviation :

    CWAT

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-6-6_L200

    Grib2_Parameter :

    [0 6 6]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Cloud

    Grib2_Parameter_Name :

    Cloud water

    Grib2_Level_Type :

    200

    Grib2_Level_Desc :

    Entire atmosphere layer

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Convective_available_potential_energy_surface
    (time, lat, lon)
    float32
    ...

    long_name :

    Convective available potential energy @ Ground or water surface

    units :

    J/kg

    abbreviation :

    CAPE

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-7-6_L1

    Grib2_Parameter :

    [0 7 6]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Thermodynamic stability indices

    Grib2_Parameter_Name :

    Convective available potential energy

    Grib2_Level_Type :

    1

    Grib2_Level_Desc :

    Ground or water surface

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Convective_available_potential_energy_pressure_difference_layer
    (time, pressure_difference_layer, lat, lon)
    float32
    ...

    long_name :

    Convective available potential energy @ Level at specified pressure difference from ground to level layer

    units :

    J/kg

    abbreviation :

    CAPE

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-7-6_L108_layer

    Grib2_Parameter :

    [0 7 6]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Thermodynamic stability indices

    Grib2_Parameter_Name :

    Convective available potential energy

    Grib2_Level_Type :

    108

    Grib2_Level_Desc :

    Level at specified pressure difference from ground to level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Convective_inhibition_surface
    (time, lat, lon)
    float32
    ...

    long_name :

    Convective inhibition @ Ground or water surface

    units :

    J/kg

    abbreviation :

    CIN

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-7-7_L1

    Grib2_Parameter :

    [0 7 7]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Thermodynamic stability indices

    Grib2_Parameter_Name :

    Convective inhibition

    Grib2_Level_Type :

    1

    Grib2_Level_Desc :

    Ground or water surface

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Convective_inhibition_pressure_difference_layer
    (time, pressure_difference_layer, lat, lon)
    float32
    ...

    long_name :

    Convective inhibition @ Level at specified pressure difference from ground to level layer

    units :

    J/kg

    abbreviation :

    CIN

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-7-7_L108_layer

    Grib2_Parameter :

    [0 7 7]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Thermodynamic stability indices

    Grib2_Parameter_Name :

    Convective inhibition

    Grib2_Level_Type :

    108

    Grib2_Level_Desc :

    Level at specified pressure difference from ground to level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Geopotential_height_surface
    (time, lat, lon)
    float32
    ...

    long_name :

    Geopotential height @ Ground or water surface

    units :

    gpm

    abbreviation :

    HGT

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-3-5_L1

    Grib2_Parameter :

    [0 3 5]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Mass

    Grib2_Parameter_Name :

    Geopotential height

    Grib2_Level_Type :

    1

    Grib2_Level_Desc :

    Ground or water surface

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Geopotential_height_isobaric
    (time, isobaric, lat, lon)
    float32
    ...

    long_name :

    Geopotential height @ Isobaric surface

    units :

    gpm

    abbreviation :

    HGT

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-3-5_L100

    Grib2_Parameter :

    [0 3 5]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Mass

    Grib2_Parameter_Name :

    Geopotential height

    Grib2_Level_Type :

    100

    Grib2_Level_Desc :

    Isobaric surface

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [10656720 values with dtype=float32]

  • Geopotential_height_zeroDegC_isotherm
    (time, lat, lon)
    float32
    ...

    long_name :

    Geopotential height @ Level of 0 °C isotherm

    units :

    gpm

    abbreviation :

    HGT

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-3-5_L4

    Grib2_Parameter :

    [0 3 5]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Mass

    Grib2_Parameter_Name :

    Geopotential height

    Grib2_Level_Type :

    4

    Grib2_Level_Desc :

    Level of 0 °C isotherm

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Geopotential_height_potential_vorticity_surface
    (time, potential_vorticity_surface, lat, lon)
    float32
    ...

    long_name :

    Geopotential height @ Potential vorticity surface

    units :

    gpm

    abbreviation :

    HGT

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-3-5_L109

    Grib2_Parameter :

    [0 3 5]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Mass

    Grib2_Parameter_Name :

    Geopotential height

    Grib2_Level_Type :

    109

    Grib2_Level_Desc :

    Potential vorticity surface

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [519840 values with dtype=float32]

  • Geopotential_height_maximum_wind
    (time, lat, lon)
    float32
    ...

    long_name :

    Geopotential height @ Maximum wind level

    units :

    gpm

    abbreviation :

    HGT

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-3-5_L6

    Grib2_Parameter :

    [0 3 5]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Mass

    Grib2_Parameter_Name :

    Geopotential height

    Grib2_Level_Type :

    6

    Grib2_Level_Desc :

    Maximum wind level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Geopotential_height_tropopause
    (time, lat, lon)
    float32
    ...

    long_name :

    Geopotential height @ Tropopause

    units :

    gpm

    abbreviation :

    HGT

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-3-5_L7

    Grib2_Parameter :

    [0 3 5]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Mass

    Grib2_Parameter_Name :

    Geopotential height

    Grib2_Level_Type :

    7

    Grib2_Level_Desc :

    Tropopause

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Geopotential_height_highest_tropospheric_freezing
    (time, lat, lon)
    float32
    ...

    long_name :

    Geopotential height @ Highest tropospheric freezing level

    units :

    gpm

    abbreviation :

    HGT

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-3-5_L204

    Grib2_Parameter :

    [0 3 5]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Mass

    Grib2_Parameter_Name :

    Geopotential height

    Grib2_Level_Type :

    204

    Grib2_Level_Desc :

    Highest tropospheric freezing level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Graupel_snow_pellets_isobaric
    (time, isobaric1, lat, lon)
    float32
    ...

    long_name :

    Graupel (snow pellets) @ Isobaric surface

    units :

    kg/kg

    abbreviation :

    GRLE

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-1-32_L100

    Grib2_Parameter :

    [ 0 1 32]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Moisture

    Grib2_Parameter_Name :

    Graupel (snow pellets)

    Grib2_Level_Type :

    100

    Grib2_Level_Desc :

    Isobaric surface

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [5718240 values with dtype=float32]

  • Graupel_snow_pellets_hybrid
    (time, hybrid, lat, lon)
    float32
    ...

    long_name :

    Graupel (snow pellets) @ Hybrid level

    units :

    kg/kg

    abbreviation :

    GRLE

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-1-32_L105

    Grib2_Parameter :

    [ 0 1 32]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Moisture

    Grib2_Parameter_Name :

    Graupel (snow pellets)

    Grib2_Level_Type :

    105

    Grib2_Level_Desc :

    Hybrid level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • ICAO_Standard_Atmosphere_Reference_Height_maximum_wind
    (time, lat, lon)
    float32
    ...

    long_name :

    ICAO Standard Atmosphere Reference Height @ Maximum wind level

    units :

    m

    abbreviation :

    ICAHT

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-3-3_L6

    Grib2_Parameter :

    [0 3 3]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Mass

    Grib2_Parameter_Name :

    ICAO Standard Atmosphere Reference Height

    Grib2_Level_Type :

    6

    Grib2_Level_Desc :

    Maximum wind level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • ICAO_Standard_Atmosphere_Reference_Height_tropopause
    (time, lat, lon)
    float32
    ...

    long_name :

    ICAO Standard Atmosphere Reference Height @ Tropopause

    units :

    m

    abbreviation :

    ICAHT

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-3-3_L7

    Grib2_Parameter :

    [0 3 3]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Mass

    Grib2_Parameter_Name :

    ICAO Standard Atmosphere Reference Height

    Grib2_Level_Type :

    7

    Grib2_Level_Desc :

    Tropopause

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Ice_temperature_surface
    (time, lat, lon)
    float32
    ...

    long_name :

    Ice temperature @ Ground or water surface

    units :

    K

    abbreviation :

    ICETMP

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_10-2-8_L1

    Grib2_Parameter :

    [10 2 8]

    Grib2_Parameter_Discipline :

    Oceanographic products

    Grib2_Parameter_Category :

    Ice

    Grib2_Parameter_Name :

    Ice temperature

    Grib2_Level_Type :

    1

    Grib2_Level_Desc :

    Ground or water surface

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Ice_water_mixing_ratio_hybrid
    (time, hybrid, lat, lon)
    float32
    ...

    long_name :

    Ice water mixing ratio @ Hybrid level

    units :

    kg/kg

    abbreviation :

    ICMR

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-1-23_L105

    Grib2_Parameter :

    [ 0 1 23]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Moisture

    Grib2_Parameter_Name :

    Ice water mixing ratio

    Grib2_Level_Type :

    105

    Grib2_Level_Desc :

    Hybrid level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Ice_water_mixing_ratio_isobaric
    (time, isobaric1, lat, lon)
    float32
    ...

    long_name :

    Ice water mixing ratio @ Isobaric surface

    units :

    kg/kg

    abbreviation :

    ICMR

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-1-23_L100

    Grib2_Parameter :

    [ 0 1 23]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Moisture

    Grib2_Parameter_Name :

    Ice water mixing ratio

    Grib2_Level_Type :

    100

    Grib2_Level_Desc :

    Isobaric surface

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [5718240 values with dtype=float32]

  • Potential_temperature_sigma
    (time, sigma, lat, lon)
    float32
    ...

    long_name :

    Potential temperature @ Sigma level

    units :

    K

    abbreviation :

    POT

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-0-2_L104

    Grib2_Parameter :

    [0 0 2]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Temperature

    Grib2_Parameter_Name :

    Potential temperature

    Grib2_Level_Type :

    104

    Grib2_Level_Desc :

    Sigma level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Precipitable_water_entire_atmosphere_single_layer
    (time, lat, lon)
    float32
    ...

    long_name :

    Precipitable water @ Entire atmosphere layer

    units :

    kg.m-2

    abbreviation :

    PWAT

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-1-3_L200

    Grib2_Parameter :

    [0 1 3]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Moisture

    Grib2_Parameter_Name :

    Precipitable water

    Grib2_Level_Type :

    200

    Grib2_Level_Desc :

    Entire atmosphere layer

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Precipitation_rate_surface
    (time, lat, lon)
    float32
    ...

    long_name :

    Precipitation rate @ Ground or water surface

    units :

    kg.m-2.s-1

    abbreviation :

    PRATE

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-1-7_L1

    Grib2_Parameter :

    [0 1 7]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Moisture

    Grib2_Parameter_Name :

    Precipitation rate

    Grib2_Level_Type :

    1

    Grib2_Level_Desc :

    Ground or water surface

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Pressure_surface
    (time, lat, lon)
    float32
    ...

    long_name :

    Pressure @ Ground or water surface

    units :

    Pa

    abbreviation :

    PRES

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-3-0_L1

    Grib2_Parameter :

    [0 3 0]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Mass

    Grib2_Parameter_Name :

    Pressure

    Grib2_Level_Type :

    1

    Grib2_Level_Desc :

    Ground or water surface

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Pressure_potential_vorticity_surface
    (time, potential_vorticity_surface, lat, lon)
    float32
    ...

    long_name :

    Pressure @ Potential vorticity surface

    units :

    Pa

    abbreviation :

    PRES

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-3-0_L109

    Grib2_Parameter :

    [0 3 0]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Mass

    Grib2_Parameter_Name :

    Pressure

    Grib2_Level_Type :

    109

    Grib2_Level_Desc :

    Potential vorticity surface

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [519840 values with dtype=float32]

  • Pressure_maximum_wind
    (time, lat, lon)
    float32
    ...

    long_name :

    Pressure @ Maximum wind level

    units :

    Pa

    abbreviation :

    PRES

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-3-0_L6

    Grib2_Parameter :

    [0 3 0]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Mass

    Grib2_Parameter_Name :

    Pressure

    Grib2_Level_Type :

    6

    Grib2_Level_Desc :

    Maximum wind level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Pressure_tropopause
    (time, lat, lon)
    float32
    ...

    long_name :

    Pressure @ Tropopause

    units :

    Pa

    abbreviation :

    PRES

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-3-0_L7

    Grib2_Parameter :

    [0 3 0]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Mass

    Grib2_Parameter_Name :

    Pressure

    Grib2_Level_Type :

    7

    Grib2_Level_Desc :

    Tropopause

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Pressure_reduced_to_MSL_msl
    (time, lat, lon)
    float32
    ...

    long_name :

    Pressure reduced to MSL @ Mean sea level

    units :

    Pa

    abbreviation :

    PRMSL

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-3-1_L101

    Grib2_Parameter :

    [0 3 1]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Mass

    Grib2_Parameter_Name :

    Pressure reduced to MSL

    Grib2_Level_Type :

    101

    Grib2_Level_Desc :

    Mean sea level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Rain_mixing_ratio_hybrid
    (time, hybrid, lat, lon)
    float32
    ...

    long_name :

    Rain mixing ratio @ Hybrid level

    units :

    kg/kg

    abbreviation :

    RWMR

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-1-24_L105

    Grib2_Parameter :

    [ 0 1 24]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Moisture

    Grib2_Parameter_Name :

    Rain mixing ratio

    Grib2_Level_Type :

    105

    Grib2_Level_Desc :

    Hybrid level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Rain_mixing_ratio_isobaric
    (time, isobaric1, lat, lon)
    float32
    ...

    long_name :

    Rain mixing ratio @ Isobaric surface

    units :

    kg/kg

    abbreviation :

    RWMR

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-1-24_L100

    Grib2_Parameter :

    [ 0 1 24]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Moisture

    Grib2_Parameter_Name :

    Rain mixing ratio

    Grib2_Level_Type :

    100

    Grib2_Level_Desc :

    Isobaric surface

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [5718240 values with dtype=float32]

  • Relative_humidity_pressure_difference_layer
    (time, pressure_difference_layer1, lat, lon)
    float32
    ...

    long_name :

    Relative humidity @ Level at specified pressure difference from ground to level layer

    units :

    %

    abbreviation :

    RH

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-1-1_L108_layer

    Grib2_Parameter :

    [0 1 1]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Moisture

    Grib2_Parameter_Name :

    Relative humidity

    Grib2_Level_Type :

    108

    Grib2_Level_Desc :

    Level at specified pressure difference from ground to level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Relative_humidity_sigma_layer
    (time, sigma_layer, lat, lon)
    float32
    ...

    long_name :

    Relative humidity @ Sigma level layer

    units :

    %

    abbreviation :

    RH

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-1-1_L104_layer

    Grib2_Parameter :

    [0 1 1]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Moisture

    Grib2_Parameter_Name :

    Relative humidity

    Grib2_Level_Type :

    104

    Grib2_Level_Desc :

    Sigma level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [1039680 values with dtype=float32]

  • Relative_humidity_isobaric
    (time, isobaric, lat, lon)
    float32
    ...

    long_name :

    Relative humidity @ Isobaric surface

    units :

    %

    abbreviation :

    RH

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-1-1_L100

    Grib2_Parameter :

    [0 1 1]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Moisture

    Grib2_Parameter_Name :

    Relative humidity

    Grib2_Level_Type :

    100

    Grib2_Level_Desc :

    Isobaric surface

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [10656720 values with dtype=float32]

  • Relative_humidity_zeroDegC_isotherm
    (time, lat, lon)
    float32
    ...

    long_name :

    Relative humidity @ Level of 0 °C isotherm

    units :

    %

    abbreviation :

    RH

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-1-1_L4

    Grib2_Parameter :

    [0 1 1]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Moisture

    Grib2_Parameter_Name :

    Relative humidity

    Grib2_Level_Type :

    4

    Grib2_Level_Desc :

    Level of 0 °C isotherm

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Relative_humidity_highest_tropospheric_freezing
    (time, lat, lon)
    float32
    ...

    long_name :

    Relative humidity @ Highest tropospheric freezing level

    units :

    %

    abbreviation :

    RH

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-1-1_L204

    Grib2_Parameter :

    [0 1 1]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Moisture

    Grib2_Parameter_Name :

    Relative humidity

    Grib2_Level_Type :

    204

    Grib2_Level_Desc :

    Highest tropospheric freezing level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Relative_humidity_entire_atmosphere_single_layer
    (time, lat, lon)
    float32
    ...

    long_name :

    Relative humidity @ Entire atmosphere layer

    units :

    %

    abbreviation :

    RH

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-1-1_L200

    Grib2_Parameter :

    [0 1 1]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Moisture

    Grib2_Parameter_Name :

    Relative humidity

    Grib2_Level_Type :

    200

    Grib2_Level_Desc :

    Entire atmosphere layer

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Relative_humidity_sigma
    (time, sigma, lat, lon)
    float32
    ...

    long_name :

    Relative humidity @ Sigma level

    units :

    %

    abbreviation :

    RH

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-1-1_L104

    Grib2_Parameter :

    [0 1 1]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Moisture

    Grib2_Parameter_Name :

    Relative humidity

    Grib2_Level_Type :

    104

    Grib2_Level_Desc :

    Sigma level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Snow_mixing_ratio_hybrid
    (time, hybrid, lat, lon)
    float32
    ...

    long_name :

    Snow mixing ratio @ Hybrid level

    units :

    kg/kg

    abbreviation :

    SNMR

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-1-25_L105

    Grib2_Parameter :

    [ 0 1 25]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Moisture

    Grib2_Parameter_Name :

    Snow mixing ratio

    Grib2_Level_Type :

    105

    Grib2_Level_Desc :

    Hybrid level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Snow_mixing_ratio_isobaric
    (time, isobaric1, lat, lon)
    float32
    ...

    long_name :

    Snow mixing ratio @ Isobaric surface

    units :

    kg/kg

    abbreviation :

    SNMR

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-1-25_L100

    Grib2_Parameter :

    [ 0 1 25]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Moisture

    Grib2_Parameter_Name :

    Snow mixing ratio

    Grib2_Level_Type :

    100

    Grib2_Level_Desc :

    Isobaric surface

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [5718240 values with dtype=float32]

  • Soil_type_surface
    (time, lat, lon)
    float32
    ...

    long_name :

    Soil type @ Ground or water surface

    units :

    (Code table 4.213)

    abbreviation :

    SOTYP

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_2-3-0_L1

    Grib2_Parameter :

    [2 3 0]

    Grib2_Parameter_Discipline :

    Land surface products

    Grib2_Parameter_Category :

    Soil Products

    Grib2_Parameter_Name :

    Soil type

    Grib2_Level_Type :

    1

    Grib2_Level_Desc :

    Ground or water surface

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Specific_humidity_pressure_difference_layer
    (time, pressure_difference_layer1, lat, lon)
    float32
    ...

    long_name :

    Specific humidity @ Level at specified pressure difference from ground to level layer

    units :

    kg/kg

    abbreviation :

    SPFH

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-1-0_L108_layer

    Grib2_Parameter :

    [0 1 0]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Moisture

    Grib2_Parameter_Name :

    Specific humidity

    Grib2_Level_Type :

    108

    Grib2_Level_Desc :

    Level at specified pressure difference from ground to level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Specific_humidity_isobaric
    (time, isobaric, lat, lon)
    float32
    ...

    long_name :

    Specific humidity @ Isobaric surface

    units :

    kg/kg

    abbreviation :

    SPFH

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-1-0_L100

    Grib2_Parameter :

    [0 1 0]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Moisture

    Grib2_Parameter_Name :

    Specific humidity

    Grib2_Level_Type :

    100

    Grib2_Level_Desc :

    Isobaric surface

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [10656720 values with dtype=float32]

  • Temperature_pressure_difference_layer
    (time, pressure_difference_layer1, lat, lon)
    float32
    ...

    long_name :

    Temperature @ Level at specified pressure difference from ground to level layer

    units :

    K

    abbreviation :

    TMP

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-0-0_L108_layer

    Grib2_Parameter :

    [0 0 0]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Temperature

    Grib2_Parameter_Name :

    Temperature

    Grib2_Level_Type :

    108

    Grib2_Level_Desc :

    Level at specified pressure difference from ground to level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Temperature_isobaric
    (time, isobaric, lat, lon)
    float32
    ...

    long_name :

    Temperature @ Isobaric surface

    units :

    K

    abbreviation :

    TMP

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-0-0_L100

    Grib2_Parameter :

    [0 0 0]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Temperature

    Grib2_Parameter_Name :

    Temperature

    Grib2_Level_Type :

    100

    Grib2_Level_Desc :

    Isobaric surface

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [10656720 values with dtype=float32]

  • Temperature_potential_vorticity_surface
    (time, potential_vorticity_surface, lat, lon)
    float32
    ...

    long_name :

    Temperature @ Potential vorticity surface

    units :

    K

    abbreviation :

    TMP

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-0-0_L109

    Grib2_Parameter :

    [0 0 0]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Temperature

    Grib2_Parameter_Name :

    Temperature

    Grib2_Level_Type :

    109

    Grib2_Level_Desc :

    Potential vorticity surface

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [519840 values with dtype=float32]

  • Temperature_altitude_above_msl
    (time, altitude_above_msl, lat, lon)
    float32
    ...

    long_name :

    Temperature @ Specific altitude above mean sea level

    units :

    K

    abbreviation :

    TMP

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-0-0_L102

    Grib2_Parameter :

    [0 0 0]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Temperature

    Grib2_Parameter_Name :

    Temperature

    Grib2_Level_Type :

    102

    Grib2_Level_Desc :

    Specific altitude above mean sea level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [779760 values with dtype=float32]

  • Temperature_maximum_wind
    (time, lat, lon)
    float32
    ...

    long_name :

    Temperature @ Maximum wind level

    units :

    K

    abbreviation :

    TMP

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-0-0_L6

    Grib2_Parameter :

    [0 0 0]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Temperature

    Grib2_Parameter_Name :

    Temperature

    Grib2_Level_Type :

    6

    Grib2_Level_Desc :

    Maximum wind level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Temperature_tropopause
    (time, lat, lon)
    float32
    ...

    long_name :

    Temperature @ Tropopause

    units :

    K

    abbreviation :

    TMP

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-0-0_L7

    Grib2_Parameter :

    [0 0 0]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Temperature

    Grib2_Parameter_Name :

    Temperature

    Grib2_Level_Type :

    7

    Grib2_Level_Desc :

    Tropopause

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Temperature_height_above_ground
    (time, height_above_ground, lat, lon)
    float32
    ...

    long_name :

    Temperature @ Specified height level above ground

    units :

    K

    abbreviation :

    TMP

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-0-0_L103

    Grib2_Parameter :

    [0 0 0]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Temperature

    Grib2_Parameter_Name :

    Temperature

    Grib2_Level_Type :

    103

    Grib2_Level_Desc :

    Specified height level above ground

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [519840 values with dtype=float32]

  • Temperature_sigma
    (time, sigma, lat, lon)
    float32
    ...

    long_name :

    Temperature @ Sigma level

    units :

    K

    abbreviation :

    TMP

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-0-0_L104

    Grib2_Parameter :

    [0 0 0]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Temperature

    Grib2_Parameter_Name :

    Temperature

    Grib2_Level_Type :

    104

    Grib2_Level_Desc :

    Sigma level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Total_ozone_entire_atmosphere_single_layer
    (time, lat, lon)
    float32
    ...

    long_name :

    Total ozone @ Entire atmosphere layer

    units :

    DU

    abbreviation :

    TOZNE

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-14-0_L200

    Grib2_Parameter :

    [ 0 14 0]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Trace gases

    Grib2_Parameter_Name :

    Total ozone

    Grib2_Level_Type :

    200

    Grib2_Level_Desc :

    Entire atmosphere layer

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Ozone_Mixing_Ratio_isobaric
    (time, isobaric, lat, lon)
    float32
    ...

    long_name :

    Ozone Mixing Ratio @ Isobaric surface

    units :

    kg.kg-1

    abbreviation :

    O3MR

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-14-192_L100

    Grib2_Parameter :

    [ 0 14 192]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Trace gases

    Grib2_Parameter_Name :

    Ozone Mixing Ratio

    Grib2_Level_Type :

    100

    Grib2_Level_Desc :

    Isobaric surface

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [10656720 values with dtype=float32]

  • Vertical_Speed_Shear_potential_vorticity_surface
    (time, potential_vorticity_surface, lat, lon)
    float32
    ...

    long_name :

    Vertical Speed Shear @ Potential vorticity surface

    units :

    s-1

    abbreviation :

    VWSH

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-2-192_L109

    Grib2_Parameter :

    [ 0 2 192]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Momentum

    Grib2_Parameter_Name :

    Vertical Speed Shear

    Grib2_Level_Type :

    109

    Grib2_Level_Desc :

    Potential vorticity surface

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [519840 values with dtype=float32]

  • Vertical_Speed_Shear_tropopause
    (time, lat, lon)
    float32
    ...

    long_name :

    Vertical Speed Shear @ Tropopause

    units :

    s-1

    abbreviation :

    VWSH

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-2-192_L7

    Grib2_Parameter :

    [ 0 2 192]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Momentum

    Grib2_Parameter_Name :

    Vertical Speed Shear

    Grib2_Level_Type :

    7

    Grib2_Level_Desc :

    Tropopause

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • MSLP_Eta_model_reduction_msl
    (time, lat, lon)
    float32
    ...

    long_name :

    MSLP (Eta model reduction) @ Mean sea level

    units :

    Pa

    abbreviation :

    MSLET

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-3-192_L101

    Grib2_Parameter :

    [ 0 3 192]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Mass

    Grib2_Parameter_Name :

    MSLP (Eta model reduction)

    Grib2_Level_Type :

    101

    Grib2_Level_Desc :

    Mean sea level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Surface_Lifted_Index_surface
    (time, lat, lon)
    float32
    ...

    long_name :

    Surface Lifted Index @ Ground or water surface

    units :

    K

    abbreviation :

    LFT X

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-7-192_L1

    Grib2_Parameter :

    [ 0 7 192]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Thermodynamic stability indices

    Grib2_Parameter_Name :

    Surface Lifted Index

    Grib2_Level_Type :

    1

    Grib2_Level_Desc :

    Ground or water surface

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Best_4_layer_Lifted_Index_surface
    (time, lat, lon)
    float32
    ...

    long_name :

    Best (4 layer) Lifted Index @ Ground or water surface

    units :

    K

    abbreviation :

    4LFTX

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-7-193_L1

    Grib2_Parameter :

    [ 0 7 193]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Thermodynamic stability indices

    Grib2_Parameter_Name :

    Best (4 layer) Lifted Index

    Grib2_Level_Type :

    1

    Grib2_Level_Desc :

    Ground or water surface

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Vegetation_surface
    (time, lat, lon)
    float32
    ...

    long_name :

    Vegetation @ Ground or water surface

    units :

    %

    abbreviation :

    VEG

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_2-0-4_L1

    Grib2_Parameter :

    [2 0 4]

    Grib2_Parameter_Discipline :

    Land surface products

    Grib2_Parameter_Category :

    Vegetation/Biomass

    Grib2_Parameter_Name :

    Vegetation

    Grib2_Level_Type :

    1

    Grib2_Level_Desc :

    Ground or water surface

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • Vertical_velocity_geometric_isobaric
    (time, isobaric, lat, lon)
    float32
    ...

    long_name :

    Vertical velocity (geometric) @ Isobaric surface

    units :

    m/s

    abbreviation :

    DZDT

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-2-9_L100

    Grib2_Parameter :

    [0 2 9]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Momentum

    Grib2_Parameter_Name :

    Vertical velocity (geometric)

    Grib2_Level_Type :

    100

    Grib2_Level_Desc :

    Isobaric surface

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [10656720 values with dtype=float32]

  • Vertical_velocity_pressure_isobaric
    (time, isobaric, lat, lon)
    float32
    ...

    long_name :

    Vertical velocity (pressure) @ Isobaric surface

    units :

    Pa/s

    abbreviation :

    VVEL

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-2-8_L100

    Grib2_Parameter :

    [0 2 8]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Momentum

    Grib2_Parameter_Name :

    Vertical velocity (pressure)

    Grib2_Level_Type :

    100

    Grib2_Level_Desc :

    Isobaric surface

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [10656720 values with dtype=float32]

  • Vertical_velocity_pressure_sigma
    (time, sigma, lat, lon)
    float32
    ...

    long_name :

    Vertical velocity (pressure) @ Sigma level

    units :

    Pa/s

    abbreviation :

    VVEL

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-2-8_L104

    Grib2_Parameter :

    [0 2 8]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Momentum

    Grib2_Parameter_Name :

    Vertical velocity (pressure)

    Grib2_Level_Type :

    104

    Grib2_Level_Desc :

    Sigma level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • u-component_of_wind_pressure_difference_layer
    (time, pressure_difference_layer1, lat, lon)
    float32
    ...

    long_name :

    u-component of wind @ Level at specified pressure difference from ground to level layer

    units :

    m/s

    abbreviation :

    UGRD

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-2-2_L108_layer

    Grib2_Parameter :

    [0 2 2]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Momentum

    Grib2_Parameter_Name :

    u-component of wind

    Grib2_Level_Type :

    108

    Grib2_Level_Desc :

    Level at specified pressure difference from ground to level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • u-component_of_wind_isobaric
    (time, isobaric, lat, lon)
    float32
    ...

    long_name :

    u-component of wind @ Isobaric surface

    units :

    m/s

    abbreviation :

    UGRD

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-2-2_L100

    Grib2_Parameter :

    [0 2 2]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Momentum

    Grib2_Parameter_Name :

    u-component of wind

    Grib2_Level_Type :

    100

    Grib2_Level_Desc :

    Isobaric surface

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [10656720 values with dtype=float32]

  • u-component_of_wind_potential_vorticity_surface
    (time, potential_vorticity_surface, lat, lon)
    float32
    ...

    long_name :

    u-component of wind @ Potential vorticity surface

    units :

    m/s

    abbreviation :

    UGRD

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-2-2_L109

    Grib2_Parameter :

    [0 2 2]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Momentum

    Grib2_Parameter_Name :

    u-component of wind

    Grib2_Level_Type :

    109

    Grib2_Level_Desc :

    Potential vorticity surface

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [519840 values with dtype=float32]

  • u-component_of_wind_altitude_above_msl
    (time, altitude_above_msl, lat, lon)
    float32
    ...

    long_name :

    u-component of wind @ Specific altitude above mean sea level

    units :

    m/s

    abbreviation :

    UGRD

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-2-2_L102

    Grib2_Parameter :

    [0 2 2]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Momentum

    Grib2_Parameter_Name :

    u-component of wind

    Grib2_Level_Type :

    102

    Grib2_Level_Desc :

    Specific altitude above mean sea level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [779760 values with dtype=float32]

  • u-component_of_wind_maximum_wind
    (time, lat, lon)
    float32
    ...

    long_name :

    u-component of wind @ Maximum wind level

    units :

    m/s

    abbreviation :

    UGRD

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-2-2_L6

    Grib2_Parameter :

    [0 2 2]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Momentum

    Grib2_Parameter_Name :

    u-component of wind

    Grib2_Level_Type :

    6

    Grib2_Level_Desc :

    Maximum wind level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • u-component_of_wind_height_above_ground
    (time, height_above_ground1, lat, lon)
    float32
    ...

    long_name :

    u-component of wind @ Specified height level above ground

    units :

    m/s

    abbreviation :

    UGRD

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-2-2_L103

    Grib2_Parameter :

    [0 2 2]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Momentum

    Grib2_Parameter_Name :

    u-component of wind

    Grib2_Level_Type :

    103

    Grib2_Level_Desc :

    Specified height level above ground

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [1559520 values with dtype=float32]

  • u-component_of_wind_tropopause
    (time, lat, lon)
    float32
    ...

    long_name :

    u-component of wind @ Tropopause

    units :

    m/s

    abbreviation :

    UGRD

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-2-2_L7

    Grib2_Parameter :

    [0 2 2]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Momentum

    Grib2_Parameter_Name :

    u-component of wind

    Grib2_Level_Type :

    7

    Grib2_Level_Desc :

    Tropopause

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • u-component_of_wind_sigma
    (time, sigma, lat, lon)
    float32
    ...

    long_name :

    u-component of wind @ Sigma level

    units :

    m/s

    abbreviation :

    UGRD

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-2-2_L104

    Grib2_Parameter :

    [0 2 2]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Momentum

    Grib2_Parameter_Name :

    u-component of wind

    Grib2_Level_Type :

    104

    Grib2_Level_Desc :

    Sigma level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • v-component_of_wind_pressure_difference_layer
    (time, pressure_difference_layer1, lat, lon)
    float32
    ...

    long_name :

    v-component of wind @ Level at specified pressure difference from ground to level layer

    units :

    m/s

    abbreviation :

    VGRD

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-2-3_L108_layer

    Grib2_Parameter :

    [0 2 3]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Momentum

    Grib2_Parameter_Name :

    v-component of wind

    Grib2_Level_Type :

    108

    Grib2_Level_Desc :

    Level at specified pressure difference from ground to level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • v-component_of_wind_isobaric
    (time, isobaric, lat, lon)
    float32
    ...

    long_name :

    v-component of wind @ Isobaric surface

    units :

    m/s

    abbreviation :

    VGRD

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-2-3_L100

    Grib2_Parameter :

    [0 2 3]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Momentum

    Grib2_Parameter_Name :

    v-component of wind

    Grib2_Level_Type :

    100

    Grib2_Level_Desc :

    Isobaric surface

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [10656720 values with dtype=float32]

  • v-component_of_wind_potential_vorticity_surface
    (time, potential_vorticity_surface, lat, lon)
    float32
    ...

    long_name :

    v-component of wind @ Potential vorticity surface

    units :

    m/s

    abbreviation :

    VGRD

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-2-3_L109

    Grib2_Parameter :

    [0 2 3]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Momentum

    Grib2_Parameter_Name :

    v-component of wind

    Grib2_Level_Type :

    109

    Grib2_Level_Desc :

    Potential vorticity surface

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [519840 values with dtype=float32]

  • v-component_of_wind_altitude_above_msl
    (time, altitude_above_msl, lat, lon)
    float32
    ...

    long_name :

    v-component of wind @ Specific altitude above mean sea level

    units :

    m/s

    abbreviation :

    VGRD

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-2-3_L102

    Grib2_Parameter :

    [0 2 3]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Momentum

    Grib2_Parameter_Name :

    v-component of wind

    Grib2_Level_Type :

    102

    Grib2_Level_Desc :

    Specific altitude above mean sea level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [779760 values with dtype=float32]

  • v-component_of_wind_maximum_wind
    (time, lat, lon)
    float32
    ...

    long_name :

    v-component of wind @ Maximum wind level

    units :

    m/s

    abbreviation :

    VGRD

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-2-3_L6

    Grib2_Parameter :

    [0 2 3]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Momentum

    Grib2_Parameter_Name :

    v-component of wind

    Grib2_Level_Type :

    6

    Grib2_Level_Desc :

    Maximum wind level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • v-component_of_wind_height_above_ground
    (time, height_above_ground1, lat, lon)
    float32
    ...

    long_name :

    v-component of wind @ Specified height level above ground

    units :

    m/s

    abbreviation :

    VGRD

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-2-3_L103

    Grib2_Parameter :

    [0 2 3]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Momentum

    Grib2_Parameter_Name :

    v-component of wind

    Grib2_Level_Type :

    103

    Grib2_Level_Desc :

    Specified height level above ground

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [1559520 values with dtype=float32]

  • v-component_of_wind_tropopause
    (time, lat, lon)
    float32
    ...

    long_name :

    v-component of wind @ Tropopause

    units :

    m/s

    abbreviation :

    VGRD

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-2-3_L7

    Grib2_Parameter :

    [0 2 3]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Momentum

    Grib2_Parameter_Name :

    v-component of wind

    Grib2_Level_Type :

    7

    Grib2_Level_Desc :

    Tropopause

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • v-component_of_wind_sigma
    (time, sigma, lat, lon)
    float32
    ...

    long_name :

    v-component of wind @ Sigma level

    units :

    m/s

    abbreviation :

    VGRD

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-2-3_L104

    Grib2_Parameter :

    [0 2 3]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Momentum

    Grib2_Parameter_Name :

    v-component of wind

    Grib2_Level_Type :

    104

    Grib2_Level_Desc :

    Sigma level

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

• Indexes: (14)
  • lat
    PandasIndex

    PandasIndex(Index([ 90.0,  89.5,  89.0,  88.5,  88.0,  87.5,  87.0,  86.5,  86.0,  85.5,
           ...
           -85.5, -86.0, -86.5, -87.0, -87.5, -88.0, -88.5, -89.0, -89.5, -90.0],
          dtype='float32', name='lat', length=361))

  • lon
    PandasIndex

    PandasIndex(Index([  0.0,   0.5,   1.0,   1.5,   2.0,   2.5,   3.0,   3.5,   4.0,   4.5,
           ...
           355.0, 355.5, 356.0, 356.5, 357.0, 357.5, 358.0, 358.5, 359.0, 359.5],
          dtype='float32', name='lon', length=720))

  • time
    PandasIndex

    PandasIndex(DatetimeIndex(['2024-04-25'], dtype='datetime64[ns]', name='time', freq=None))

  • altitude_above_msl
    PandasIndex

    PandasIndex(Index([1829.0, 2743.0, 3658.0], dtype='float32', name='altitude_above_msl'))

  • sigma_layer
    PandasIndex

    PandasIndex(Index([0.5800000429153442, 0.6650000214576721, 0.7200000286102295,
           0.8300000429153442],
          dtype='float32', name='sigma_layer'))

  • pressure_difference_layer
    PandasIndex

    PandasIndex(Index([9000.0], dtype='float32', name='pressure_difference_layer'))

  • isobaric
    PandasIndex

    PandasIndex(Index([     1.0,      2.0,      4.0,      7.0,     10.0,     20.0,     40.0,
               70.0,    100.0,    200.0,    300.0,    500.0,    700.0,   1000.0,
             1500.0,   2000.0,   3000.0,   4000.0,   5000.0,   7000.0,  10000.0,
            15000.0,  20000.0,  25000.0,  30000.0,  35000.0,  40000.0,  45000.0,
            50000.0,  55000.0,  60000.0,  65000.0,  70000.0,  75000.0,  80000.0,
            85000.0,  90000.0,  92500.0,  95000.0,  97500.0, 100000.0],
          dtype='float32', name='isobaric'))

  • isobaric1
    PandasIndex

    PandasIndex(Index([  5000.0,  10000.0,  15000.0,  20000.0,  25000.0,  30000.0,  35000.0,
            40000.0,  45000.0,  50000.0,  55000.0,  60000.0,  65000.0,  70000.0,
            75000.0,  80000.0,  85000.0,  90000.0,  92500.0,  95000.0,  97500.0,
           100000.0],
          dtype='float32', name='isobaric1'))

  • height_above_ground
    PandasIndex

    PandasIndex(Index([80.0, 100.0], dtype='float32', name='height_above_ground'))

  • potential_vorticity_surface
    PandasIndex

    PandasIndex(Index([-2e-06, 2e-06], dtype='float32', name='potential_vorticity_surface'))

  • height_above_ground1
    PandasIndex

    PandasIndex(Index([20.0, 30.0, 40.0, 50.0, 80.0, 100.0], dtype='float32', name='height_above_ground1'))

  • sigma
    PandasIndex

    PandasIndex(Index([0.995], dtype='float32', name='sigma'))

  • pressure_difference_layer1
    PandasIndex

    PandasIndex(Index([1500.0], dtype='float32', name='pressure_difference_layer1'))

  • hybrid
    PandasIndex

    PandasIndex(Index([1.0], dtype='float32', name='hybrid'))

• Attributes: (10)

  Originating_or_generating_Center :

  US National Weather Service, National Centres for Environmental Prediction (NCEP)

  Originating_or_generating_Subcenter :

  0

  GRIB_table_version :

  2,1

  Type_of_generating_process :

  Analysis

  Analysis_or_forecast_generating_process_identifier_defined_by_originating_centre :

  Analysis from GFS (Global Forecast System)

  file_format :

  GRIB-2

  Conventions :

  CF-1.6

  history :

  Read using CDM IOSP GribCollection v3

  featureType :

  GRID

  _CoordSysBuilder :

  ucar.nc2.internal.dataset.conv.CF1Convention

Specify an analysis time, and then create DataArray objects that are subset for the specified time and the 20m AGL level (this is the lowest level in the dataset)

u = ds['u-component_of_wind_height_above_ground'].sel(time=timeObj,height_above_ground1=20)
v = ds['v-component_of_wind_height_above_ground'].sel(time=timeObj,height_above_ground1=20)

Create a Dataset that contains just the wind components

ipyleaflet’s Velocity method produces an animated streamline effect. It accepts an Xarray dataset that contains just two arrays … specifically, the u- and v- components of the wind vector we have chosen for visualization.

(Perhaps there is a more efficient way of doing this, but the following cell will create a new Xarray Dataset that consists of just two arrays … u and v.)

# First create the Dataset out of the 'u' Dataarray
dsWind = u.to_dataset()

# Append v to the Dataset
dsWind['v'] = v

# Rename the u DataArray to 'u'
name_dict = {'u-component_of_wind_height_above_ground':'u'}
dsWind = dsWind.rename_vars(name_dict)

# Verify that the Dataset looks ok
dsWind

<xarray.Dataset>
Dimensions:               (lat: 361, lon: 720)
Coordinates:
  * lat                   (lat) float32 90.0 89.5 89.0 ... -89.0 -89.5 -90.0
  * lon                   (lon) float32 0.0 0.5 1.0 1.5 ... 358.5 359.0 359.5
    reftime               datetime64[ns] ...
    time                  datetime64[ns] 2024-04-25
    height_above_ground1  float32 20.0
Data variables:
    u                     (lat, lon) float32 ...
    v                     (lat, lon) float32 ...

xarray.Dataset

• Dimensions:
  • lat: 361
  • lon: 720
• Coordinates: (5)
  • lat
    (lat)
    float32
    90.0 89.5 89.0 ... -89.5 -90.0

    units :

    degrees_north

    _CoordinateAxisType :

    Lat

    array([ 90. ,  89.5,  89. , ..., -89. , -89.5, -90. ], dtype=float32)

  • lon
    (lon)
    float32
    0.0 0.5 1.0 ... 358.5 359.0 359.5

    units :

    degrees_east

    _CoordinateAxisType :

    Lon

    array([  0. ,   0.5,   1. , ..., 358.5, 359. , 359.5], dtype=float32)

  • reftime
    ()
    datetime64[ns]
    ...

    standard_name :

    forecast_reference_time

    long_name :

    GRIB reference time

    _CoordinateAxisType :

    RunTime

    [1 values with dtype=datetime64[ns]]

  • time
    ()
    datetime64[ns]
    2024-04-25

    standard_name :

    time

    long_name :

    GRIB forecast or observation time

    _CoordinateAxisType :

    Time

    array('2024-04-25T00:00:00.000000000', dtype='datetime64[ns]')

  • height_above_ground1
    ()
    float32
    20.0

    units :

    m

    long_name :

    Specified height level above ground

    positive :

    up

    Grib_level_type :

    103

    datum :

    ground

    _CoordinateAxisType :

    Height

    _CoordinateZisPositive :

    up

    array(20., dtype=float32)

• Data variables: (2)
  • u
    (lat, lon)
    float32
    ...

    long_name :

    u-component of wind @ Specified height level above ground

    units :

    m/s

    abbreviation :

    UGRD

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-2-2_L103

    Grib2_Parameter :

    [0 2 2]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Momentum

    Grib2_Parameter_Name :

    u-component of wind

    Grib2_Level_Type :

    103

    Grib2_Level_Desc :

    Specified height level above ground

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

  • v
    (lat, lon)
    float32
    ...

    long_name :

    v-component of wind @ Specified height level above ground

    units :

    m/s

    abbreviation :

    VGRD

    grid_mapping :

    LatLon_Projection

    Grib_Variable_Id :

    VAR_0-2-3_L103

    Grib2_Parameter :

    [0 2 3]

    Grib2_Parameter_Discipline :

    Meteorological products

    Grib2_Parameter_Category :

    Momentum

    Grib2_Parameter_Name :

    v-component of wind

    Grib2_Level_Type :

    103

    Grib2_Level_Desc :

    Specified height level above ground

    Grib2_Generating_Process_Type :

    Analysis

    Grib2_Statistical_Process_Type :

    UnknownStatType--1

    [259920 values with dtype=float32]

• Indexes: (2)
  • lat
    PandasIndex

    PandasIndex(Index([ 90.0,  89.5,  89.0,  88.5,  88.0,  87.5,  87.0,  86.5,  86.0,  85.5,
           ...
           -85.5, -86.0, -86.5, -87.0, -87.5, -88.0, -88.5, -89.0, -89.5, -90.0],
          dtype='float32', name='lat', length=361))

  • lon
    PandasIndex

    PandasIndex(Index([  0.0,   0.5,   1.0,   1.5,   2.0,   2.5,   3.0,   3.5,   4.0,   4.5,
           ...
           355.0, 355.5, 356.0, 356.5, 357.0, 357.5, 358.0, 358.5, 359.0, 359.5],
          dtype='float32', name='lon', length=720))

• Attributes: (0)

Create the animation

Center it, specify a zoom level, and select a background map; create and add a velocity layer from the Dataset that contains u and v.

center = (40.0, -70.0)
zoom = 6
m = Map(center=center, zoom=zoom, interpolation='nearest', basemap=basemaps.CartoDB.DarkMatter)


display_options = {
    'velocityType': 'Global Wind',
    'displayPosition': 'bottomleft',
    'displayEmptyString': 'No wind data'
}
wind = Velocity(data=dsWind,
                zonal_speed='u',
                meridional_speed='v',
                latitude_dimension='lat',
                longitude_dimension='lon',
                velocity_scale=0.01,
                max_velocity=120,
                display_options=display_options)
m.add_layer(wind)

Display the map.

m

If you move your mouse/touchpad, you will see direction and speed at the nearest gridpoint displayed at the bottom left of the frame.

Things to try:

1. Create a velocity map using gridded data from another source ... such as RDA or another datasource from the Unidata THREDDS Server.
2. Make this notebook dynamic in terms of date so it will always provide a recent (e.g. one day ago) visualization.

---

Summary

• Ipyleaflet provides Javascript-enabled interactivity in a Jupyter notebook.

• Ipyleaflet’s Velocity function creates a flow-vector field that can be layered onto a basemap.

• The Velocity function accepts an Xarray dataset that contains the u- and v- wind components.

What’s Next?

We’ll continue to explore interactive visualizations, next with the Holoviz suite of packages.

References:

1. ipyleaflet

2. Leaflet

3. ipyleaflet Map

4. ipyleaflet Basemaps

5. ipyleaflet tile_layer

6. Remote basemap providers

7. ipyleaflet Velocity

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