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.

Mean PC-τ plots for extended low-latitudes (35S-35N)

Geographic distribution of clusters for extended low-latitudes (35S-35N)

Presented here are the Extended Tropical Weather States frequency of occurrence (WSFOCC) based on ISCCP D1 cloud top pressure and cloud optical thickness data for a Pacific cross-section. The diagonal consists of thirteen locations starting at 1S, 173W and moving northeastwards in 4 degree longitude and 3 degree latitude steps to 35N, 125W. To view the FOCC histogram of any grid cell, click on that cell in the image below.

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