2007-2008 GFS Analyses
Dynamic Tropopause / Jet, Thickness, SLP, and Moisture / Divergent Outflow-Jet Interaction / Q Vectors

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Dynamic Tropopause Loops
12-hourly 1.0-deg GFS analyses
DT (1.5-PVU surface) potential temperature (K; shaded) and wind barbs (knots),
925-850-hPa layer averaged cyclonic relative vorticity (black contours every 0.5 x 10^-4 s^-1
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East Asia/West North Pacific

North Pacific

Tropical East Pac

North America

North Atlantic

High-Latitude
North Atlantic

Northern Hemisphere

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December

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January

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September

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Jet, Thickness, SLP, and Moisture Loops
12-hourly 1.0-deg GFS analyses
250-hPa wind speed (m s^-1, shaded according to color bar), 1000-500 hPa thickness (dashed contours every 6 dam),
SLP (solid contours every 4 hPa), total precipitable water (mm, shaded according to gray scale)


East Asia/West North Pacific

North Pacific

Tropical
East Pac

North America

North Atlantic

High-Latitude
North Atlantic

Northern Hemisphere

October

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November

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December

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January

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Divergent Outflow-Jet Interaction Loops
12-hourly 1.0-deg GFS analyses
250-hPa wind speed (m s^-1, shaded according to color bar), 250-hPa potential vorticity (gray contours every 1 PVU),
250-hPa relative humidity (%, shaded according to gray scale), 600-400 hPa layer averaged omega (red contours every 5 x 10^-3 hPa s^-1, neg. values only),
300-200 hPa layer averaged irrotational wind (vectors starting at 5 m s^-1)


East Asia/West North Pacific

North Pacific

Tropical East Pac

North America

North Atlantic

High-Latitude
North Atlantic

October

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November

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December

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January

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February

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April

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Q Vector Loops
12-hourly 1.0-deg GFS analyses
700-hPa geo. height (dam; solid blue), temp. (deg C; dashed red),
Q vector (arrows, plotted for values greater than 5 x 10^-7 Pa m^-1 s^-1 only), and
Term A of the Q-vector form of the QG Omega equation (10^-12 Pa m^-2 s^-1, shaded according to the colorbar)


North Pacific

North America

North Atlantic

High-Latitude
North Atlantic

October

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November

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December

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January

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February

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March

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April

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May

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June

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July

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August

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September

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