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Detailed Reference Information |
Yang, Y., Qiu, C. and Gong, J. (2006). Physical initialization applied in WRF-Var for assimilation of Doppler radar data. Geophysical Research Letters 33: doi: 10.1029/2006GL027656. issn: 0094-8276. |
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WRF-Var is further developed with Physical Initialization (PI) to assimilate Doppler radar radial velocity and reflectivity observations. In this updated 3D-Var, specific humidity and vertical velocity are first derived from reflectivity with PI, and then the model fields of specific humidity are replaced by the modified ones, finally, the estimated vertical velocity is added to the cost-function of the existing WRF-Var (version 2.0) as a new observation type, and radial velocity observations are assimilated directly by the method afforded by WRF-Var. It is tested with a rainfall event that occurred in Hubei province near the Yangtze River on 19 June 2002. Results show that the updated 3D-Var shows better capability to forecast the precipitation than the WRF-Var does, and the forecast reflectivity field correlates well with the observations for about 4-h prediction period. |
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BACKGROUND DATA FILES |
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Abstract |
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Keywords
Mathematical Geophysics, Numerical approximations and analysis, Atmospheric Processes, Data assimilation, Atmospheric Processes, Mesoscale meteorology, Atmospheric Processes, Instruments and techniques |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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