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《热带气象学报(英文版)》 2009-01
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NUMERICAL EXPERIMENTS ON THE IMPACTS OF SEA SPRAY ON TROPICAL CYCLONES

ZHENG Jing 1, 2, FEI Jian-fang 1, 3 , WANG Yuan 3, HUANG Xiao-gang 1 , LI Qi-ming 4, WU Hong-yi 4 (1. Institute of Meteorology, PLA University of Science & Technology, Nanjing 211101 China; 2. Post No.76, PLA Troops 73061, Xuzhou 221008 China; 3. Department of Atmospheric Science, Nanjing University, Nanjing 210093 China; 4. Meteorology Observatory of PLA Navy 91774, Shanghai 200083 China)  
The latest version of sea spray flux parameterization scheme developed by Andreas is coupled with the PSU/NCAR model MM5 in this paper. A western Pacific tropical cyclone named Nabi in 2005 is simulated using this coupled air-sea spray modeling system to study the impacts of sea spray evaporation on the evolution of tropical cyclones. The results demonstrate that sea spray can lead to a significant increase of heat fluxes in the air-sea interface, especially the latent heat flux, the maximum of which can increase by up to about 35% - 80% The latent heat flux seems to be more important than the sensible heat flux for the evolution of tropical cyclones. Regardless of whether sea spray fluxes have been considered, the model can always simulate the track of Nabi well, which seems to indicate that sea spray has little impact on the movement of tropical cyclones. However, with sea spray fluxes taken into account in the model, the intensity of a simulated tropical cyclone can have significant increase. Due to the enhancement of water vapor and heat from the sea surface to the air caused by sea spray, the warm core structure is better-defined, the minimum sea level pressure decreases and the vertical speed is stronger around the eye in the experiments, which is propitious to the development and evolution of tropical cyclones.
【Fund】: Key Program of National Natural Science Foundation of China (40830235 40333025);; State Key Development Program of Basic Research (973 Program) of China (2004CB418301)
【CateGory Index】: P444
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