Extended Abstract (604K)JP2.2
Impact of soil moisture initialization on numerical weather forecasting over the Mississippi Delta Region
Valentine Anantharaj, Mississippi State University, Mississippi State, MS; and G. Mostovoy, U. S. Nair, and P. J. Fitzpatrick
Results of mesoscale 72-hr forecasts produced by WRF model runs with two different
soil moisture initializations were compared over the Mississippi Delta Region.
One set of the WRF model forecasts (control runs) were initialized from the NAM analysis
fields at 12-km resolution including 4-layer soil moisture data. Other set of WRF
model runs were started from the same initial conditions except for the soil moisture,
which were substituted by the data simulated by the Noah Land Surface Model (LSM)
available from the Land Information System (LIS). The Noah LSM was integrated at 5-km
resolution in time using the NLDAS meteorological forcing data and two-years spin-up
period. In both cases, thirty forecasts were performed with 4-km grid resolution spanning
the period of June-July 2006. Forecast performance statistics and
moisture budget studies quantifing a magnitude and localization of an atmospheric
response to different soil moisture initializations will be presented.
Joint Poster Session 2, Land-Atmosphere Interactions, Part II
Wednesday, 23 January 2008, 2:30 PM-4:00 PM, Exhibit Hall B
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