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《热带气象学报(英文版)》 2009-01
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CORRECTION OF ASYMMETRIC STRENGTHENING OF QUIKSCAT WIND FIELD AND ASSIMILATION APPLICATION IN TYPHOON SIMULATION

WANG Liang 1, LU Han-cheng 2, PAN Xiao-bin 2, ZHANG Yun 2 (1. Mesoscale Meteorology Research Centre, Institute of Meteorology, PLA University of Science and Technology, Nanjing 211101 China; 2. Department of Military Meteorology, PLA University of Science and Technology, Nanjing 211101 China)  
As an approach to the technological problem that the wind data of QuikSCAT scatterometer cannot accurately describe the zone of typhoon-level strong wind speed, some objective factors such as the typhoon moving speed, direction and friction are introduced in this study to construct the asymmetric strengthening of the QuikSCAT wind field. Then by adopting a technology of four-dimensional data assimilation, an experiment that includes both the assimilation and forecasting phases is designed to simulate Typhoon Rananim numerically. The results show that with model constraints and adjustment, this technology can incorporate the QuikSCAT wind data to the entire column of the model atmosphere, improve greatly the simulating effects of the whole-column wind, pressure field and the track as well as the simulated typhoon intensity covered by the forecast phase, and work positively for the forecasting of landfall locations.
【Fund】: National Key Fundamental Research and Development Plan of China (2004CB418301);; Natural Science Foundation of China (40830958)
【CateGory Index】: P444
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