The goal of GEWEX/WGNE Pacific Cross-section Intercomparison (GPCI) is to evaluate climate and weather prediction models in the tropics and sub-tropics, making use of satellite observations. The focus will be on the physics of climate models, including clouds, turbulence, convection and radiation. Models and observations are analyzed along a Pacific Cross-section from the stratocumulus regions off the coast of California, across the shallow cumulus areas, to the deep convection regions of the ITCZ.

This case study presents data from 1 June 2003 to 31 Aug 2003 and covers a region from 5.0S to 45.0N latitude and from 160.0E to 240.0E longitude.

6-hourly NCEP Reanalysis data are available here for certain pressure level, surface, and surface flux variables.

• Air temperature, Geopotential height, and U-wind and V-wind data are available at 10, 20, 30, 50, 70, 100, 150, 200, 250, 300, 400, 500, 600, 700, 850, 925, 1000 mb.
• Relative humidity and Specific humidity data are available at 300, 400, 500, 600, 700, 850, 925, 1000 mb.
• Vertical velocity data are available at 100, 150, 200, 250, 300, 400, 500, 600, 700, 850, 925, 1000 mb.
• Surface pressure, Sea-level pressure, Surface Temperature, Soil Temperature (0-10 cm), Soil Temperature (10-200 cm), Soil moisture (0-10 cm), and Soil Moisture(10-200 cm) data are available at a single level.
• A land/sea map and surface height map are also available.

You may:

• Download all NCEP levels and variables in one file

• Ftp selected files (ftp://gcss-dime.giss.nasa.gov cd to pub/GPCI/NCEPINIT)
• Browse NCEP data for selected levels and variables
• Or view other sources if available

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