THE INFLUENCE OF SOUTH CHINA SEA SUMMER MONSOON ON THE RAINSTORM ASSOCIATED WITH THE LANDFALLING STRONG
TROPICAL STORM BILIS (0604) |
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Authors: | LIU Chun-xi JIANG Xiao-ping FEI Zhi-bin ZHAO Si-nan and LUO Wan-jun |
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Institution: | 1. LED, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301 China;Graduate School of the Chinese Academy of Sciences, Beijing 100049 China;Guangzhou Institute of Tropical and Marine Meteorology, CMA, Guangzhou 510080 China 2. Institute of Meteorology, PLA University of Science and Technology, Nanjing 211101 China;Guangzhou Institute of Tropical and Marine Meteorology, CMA, Guangzhou 510080 China 3. Hydrometeorological Center, Guangzhou Military Area Command, Guangzhou 510083 China 4. Hydrometeorological Center of the Headquarters of General Staff, Beijing 100081 China 5. Meteorological Observatory of Army Post No.92689, Zhanjiang 524091 China |
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Abstract: | Bilis (0604) is a strong tropical storm that sustained over land for a long time, bringing
torrential rain. With conventional observation data, radar data and infrared satellite imagery, Mesoscale
Convective Systems (MCSs) are found to form and develop successively, which cause torrential rain. Then
numerical simulation is conducted using MM5 to simulate a 66-h post-landfall process. The simulated
distribution and intensity of precipitation match the observation well. With the simulated result, the
characteristics and process of MCS development are analyzed with the finding that the convergence of the
tropical depression and South China Sea (SCS) summer monsoon over The south of China causes the
formation of a mesoscale vortex, mesoscale convergence center and mesoscale convergence line, which are
favorable to the development and sustaining of the MCSs. A sensitivity experiment indicates that the SCS
summer monsoon transports unstable energy and water vapor continuously, which is of vital importance to
rainstorms. |
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Keywords: | Bilis MM5 SCS Summer Monsoon MCS |
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