2008-2009
GFS Analyses
Dynamic
Tropopause /
Jet,
Thickness, SLP, and Moisture /
Divergent
Outflow-Jet Interaction
/
Q
Vectors
home
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 |
Northern Hemisphere |
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August |
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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)
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East Asia/West North Pacific |
North Pacific |
Tropical
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North America |
North Atlantic |
High-Latitude |
Northern Hemisphere |
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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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)
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East Asia/West North Pacific |
North Pacific |
Tropical East Pac |
North America |
North Atlantic |
High-Latitude |
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 |
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)
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North Pacific |
North America |
North Atlantic |
High-Latitude |
October |
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September |