2014 GFS Analyses






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Dynamic Tropopause Loops


6-hourly 0.5° GFS analyses, except 1.0° analyses for DT potential temperature and wind

• DT (1.5-PVU surface) potential temperature (shaded, K) and wind barbs (knots), 925–850-hPa layer-averaged cyclonic relative vorticity (black contours, every 0.5 x 10-4 s-1)


Indian Ocean

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Western North Pacific

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North Pacific

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Tropical East Pacific

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North America

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North Atlantic

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High-Lat North Atlantic

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Eurasia

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Northern Hemisphere

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South America

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Africa

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Australia

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Extratropical Waveguide Loops

6-hourly 0.5° GFS analyses

• 250-hPa meridional wind anomaly (m s-1, shaded according to color bar, departure from a 21-day running mean long-term climatology, only greater than one-standard-deviation magnitudes are plotted) and PV (solid, every 1 PVU, with the zero line omitted)


Northern Hemisphere

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Southern Hemisphere

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Jet, Thickness, SLP, and Moisture Loops

6-hourly 0.5-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)


Indian Ocean

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Western North Pacific

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North Pacific

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Tropical East Pacific

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North America

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North Atlantic

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High-Lat North Atlantic

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Eurasia

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Northern Hemisphere

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South America

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Africa

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Australia

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Divergent Outflow–Jet Interaction Loops

6-hourly 0.5-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 ascent (red contours every 5 x 10-3 hPa s-1, negative values only), 300–200-hPa layer averaged irrotational wind (vectors starting at 3 m s-1)


Indian Ocean

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Western North Pacific

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North Pacific

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Tropical East Pacific

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North America

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North Atlantic

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High-Lat North Atlantic

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Eurasia

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South America

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Africa

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Australia

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PV Advection by Nondivergent Wind Loops

6-hourly 0.5-deg GFS analyses

• 250-hPa streamfunction (red, every 8 x 106 m2 s-1), PV (gray, every 1 PVU), PV advection by the nondivergent wind (shaded according to the color bar in 10-4 PVU s-1), and wind speed (shaded according to the gray scale in m s-1)


Indian Ocean

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Western North Pacific

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North Pacific

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Tropical East Pacific

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North America

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North Atlantic

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High-Lat North Atlantic

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Eurasia

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South America

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Africa

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Australia

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Q Vector Loops

6-hourly 0.5-deg GFS analyses

• 700-hPa geopotential height (solid blue, dam), temperature (dashed red, °C), 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 (shaded according to the colorbar, 10-12 Pa m-2 s-1)


Indian Ocean

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Western North Pacific

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North Pacific

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North America

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North Atlantic

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High-Lat North Atlantic

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Eurasia

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South America

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Africa

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Australia

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