Earth 

Global Atmospheric Sea Level Pressure during Hurricane Frances (WMS)

The weight of the Earth's atmosphere exerts pressure on the surface of the Earth. This pressure varies from place-to-place due the variations in the Earth's surface since higher altitudes have less atmosphere above them than lower altitudes. Atmospheric pressure also varies from time-to-time due to the uneven heating of the atmosphere by the sun and the rotation of the Earth, causing weather. In order to see the changes in pressure which affect the weather, the variation due to altitude is removed from the surface pressure, creating a quantity called sea level pressure. This animation shows the atmospheric sea level pressure for the whole globe from September 1, 2004, through September 5, 2004, during the period of Hurricane Frances in the western Atlantic Ocean and Typhoon Songda in the western Pacific Ocean. The sharp, moving low pressures areas for Frances and Songda can be clearly seen in the oceans. Even with the direct effect of altitude removed, cold high-altitude regions such as the South Pole and the Himalayan Plateau still exhibit lower-than-normal pressures, probably due to the interaction of cold air over those regions with the warmer air in the surrounding regions.


Visualization Credits

Jeff de La Beaujardiere (NASA): Lead Animator
Horace Mitchell (NASA/GSFC): Animator
William Putman (NASA/GSFC): Scientist
Please give credit for this item to:
NASA/Goddard Space Flight Center Scientific Visualization Studio

Short URL to share this page:
http://svs.gsfc.nasa.gov/goto?3182

Data Used:
fvGCM/CLDTOT (Vertically-integrated, random overlap, total cloud cover (Inst) [fraction]) 2005-09-01T03:00 -- 2005-09-05T24:00
fvGCM/H300 (300 hPa Geopotential height (Inst) [m]) 2005-09-01T03:00 -- 2005-09-05T24:00
fvGCM/H500 (500 hPa Geopotential height (Inst) [m]) 2005-09-01T03:00 -- 2005-09-05T24:00
fvGCM/LHFX (Surface latent heat flux (Inst) [W/m2]) 2005-09-01T03:00 -- 2005-09-05T24:00
fvGCM/PRECC (Convective precipitation rate (Inst) [mm/day]) 2005-09-01T03:00 -- 2005-09-05T24:00
fvGCM/PRECL (Large-scale precipitation rate (Inst) [mm/day]) 2005-09-01T03:00 -- 2005-09-05T24:00
fvGCM/PRECP (instant precip rate at output time) 2005-09-01T03:00 -- 2005-09-05T24:00
fvGCM/Predicted Track 2005-09-01T03:00 -- 2005-09-05T24:00
fvGCM/SLP (Sea level pressure (Inst) [Pa]) 2005-09-01T03:00 -- 2005-09-05T24:00
fvGCM/T2M (2 meter temperature (Inst) (K)) 2005-09-01T03:00 -- 2005-09-05T24:00
fvGCM/T850 (850 hPa temperature (Inst) [K]) 2005-09-01T03:00 -- 2005-09-05T24:00
fvGCM/THICK (Thickness of the 500 hPa to 1000 hPa Layer (5400m = freezing line) (Inst) [m]) 2005-09-01T03:00 -- 2005-09-05T24:00
fvGCM/TQ (Total precipitable water (Inst) [kg/m2]) 2005-09-01T03:00 -- 2005-09-05T24:00
fvGCM/U10M (10 meter U wind (Inst) [m/s]) 2005-09-01T03:00 -- 2005-09-05T24:00
fvGCM/U200 (200 hPa U wind (Inst) [m/s]) 2005-09-01T03:00 -- 2005-09-05T24:00
fvGCM/U850 (850 hPa U wind (Inst) [m/s]) 2005-09-01T03:00 -- 2005-09-05T24:00
fvGCM/V10M (10 meter V wind (Inst) [m/s]) 2005-09-01T03:00 -- 2005-09-05T24:00
fvGCM/V200 (200 hPa V wind (Inst) [m/s]) 2005-09-01T03:00 -- 2005-09-05T24:00
fvGCM/V850 (850 hPa V wind (Inst) [m/s]) 2005-09-01T03:00 -- 2005-09-05T24:00
fvGCM/W10M (10 meter Vertical Velocity (Inst) [m/s]) 2005-09-01T03:00 -- 2005-09-05T24:00
fvGCM/W200 (200 hPa Vertical Velocity (Inst) [m/s]) 2005-09-01T03:00 -- 2005-09-05T24:00
fvGCM/W850 (850 hPa Vertical Velocity (Inst) [m/s]) 2005-09-01T03:00 -- 2005-09-05T24:00
fvGCM/Global Surface Wind Speed 2005-09-01T03:00 -- 2005-09-05T24:00
fvGCM/Global Atmospheric Water Vapor 2005-09-01T03:00 -- 2005-09-05T24:00
fvGCM/Global Convective Precipitation 2005-09-01T03:00 -- 2005-09-05T24:00
fvGCM/Global Atmospheric Surface Pressure 2005-09-01T03:00 -- 2005-09-05T24:00
fvGCM/Global Large-scale Precipitation 2005-09-01T03:00 -- 2005-09-05T24:00
fvGCM/Global Surface Latent Heat Flux 2005-09-01T03:00 -- 2005-09-05T24:00

This item is part of these series:
WMS
fvGCM

Keywords:
DLESE >> Atmospheric science
SVS >> HDTV
DLESE >> Natural hazards
GCMD >> Earth Science >> Atmosphere >> Atmospheric Phenomena >> Hurricanes
GCMD >> Earth Science >> Atmosphere >> Atmospheric Phenomena >> Typhoons
GCMD >> Earth Science >> Atmosphere >> Atmospheric Pressure >> Sea Level Pressure
GCMD >> Earth Science >> Human Dimensions >> Natural Hazards >> Meteorological Hazards
GCMD >> Location >> Global
SVS >> Hurricane Frances
SVS >> Hyperwall
NASA Science >> Earth

GCMD keywords can be found on the Internet with the following citation: Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version 8.0.0.0.0