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Title: Diagnosis of the summertime warm and dry bias over the U. S. Southern Great Plains in the GFDL climate model using a weather forecasting approach

Diagnosis of the summertime warm and dry bias over the U. S. Southern Great Plains in the GFDL climate model using a weather forecasting approach Weather forecasts started from realistic initial conditions are used to diagnose the large warm and dry bias over the United States Southern Great Plains simulated by the GFDL climate model. The forecasts exhibit biases in surface air temperature and precipitation within 3 days which appear to be similar to the climate bias. With the model simulating realistic evaporation but underestimated precipitation, a deficit in soil moisture results which amplifies the initial temperature bias through feedbacks with the land surface. The underestimate of precipitation is associated with an inability of the model to simulate the eastward propagation of convection from the front-range of the Rocky Mountains and is insensitive to an increase of horizontal resolution from 2{sup o} to 0.5{sup o} latitude.
Authors: ; ; ; ;
Publication Date:
OSTI Identifier:OSTI ID: 900082
Report Number(s):UCRL-JRNL-222802
TRN: US200709%%374
DOE Contract Number:W-7405-ENG-48
Resource Type:Journal Article
Resource Relation:Journal Name: Geophysical Research Letters, vol. 33, N/A, September 22, 2006, Geophys. Res. Lett., 33, L18805, doi:10.1029/2006GL027567
Research Org:Lawrence Livermore National Laboratory (LLNL), Livermore, CA
Sponsoring Org:USDOE
Country of Publication:United States
Language:English
Subject: 54 ENVIRONMENTAL SCIENCES; CLIMATE MODELS; CLIMATES; CONVECTION; DIAGNOSIS; EVAPORATION; FORECASTING; MOISTURE; PRECIPITATION; RESOLUTION; ROCKY MOUNTAINS; SOILS; SURFACE AIR; WEATHER