Impacts of sea spray on the boundary layer structure of Typhoon Imbudo |
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| Authors: | TANG Jie LI Weibiao CHEN Shumin and WANG Lei |
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| Institution: | 1.Department of Atmospheric Sciences, Sun Yat-Sen University, Guangzhou 510275, China;Zhaoqing Meteorological Bureau, Zhaoqing, Guangdong 526020, China2.Department of Atmospheric Sciences, Sun Yat-Sen University, Guangzhou 510275, China3.Department of Atmospheric Sciences, Sun Yat-Sen University, Guangzhou 510275, China;South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China |
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| Abstract: | High winds in a typhoon over the ocean can produce substantial amounts of spray in the lower part of the atmospheric boundary layer, which can modify the transfer of momentum, heat, and moisture across the air-sea interface. However, the consequent effects on the boundary layer structure and the evolution of the typhoon are largely unknown. The focus of this paper is on the role of sea spray on the stormintensity and the structure of the atmospheric boundary layer. The case study is Typhoon Imbudo in July 2003. The results show that sea spray tends to intensify storms by increasing the sea surface heat fluxes. Moreover, the effects of sea spray are mainly felt in boundary layer. Spray evaporation causes the atmospheric boundary layer to experience cooling and moistening. Sea spray can cause significant effects on the structure of boundary layer. The boundary-layer height over the eyewall area east to the center of Typhoon Imbudo was increased with a maximum up to about 550 mdue to sea spray, which is closely related with the enhancements of the heat fluxes, upwardmotions, and horizontalwinds in this region due to sea spray. |
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| Keywords: | sea spray typhoon boundary structure |
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