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Urban effects and summer thunderstorms in a tropical cyclone affected situation over guangzhou city

Science china Earth Sciences 2007年第12期50卷 1867-1876页

作者： meng weiguang1,3,yan jinghua1 & hu haibo2 1 institute of tropical and marine meteorology,chinese meteorological administration(CMA),guangzhou 510080,china 2 institute of Urban meteorology,CMA,Beijing 100089,china 3 State Key Laboratory of Severe Weather,chinese Academy of meteorological Sciences,Beijing 100081,china institute of tropical and marine meteorology Chinese Meteorological Administration (CMA) Guangzhou China State Key Laboratory of Severe Weather Chinese Academy of Meteorological Sciences Beijing China institute of Urban meteorology CMA Beijing China

With data mainly from guangzhou mesonet Automatic Weather Stations(AWS),guangzhou Doppler Radar and satellite TBB data,characteristics and evolution of the urban heat island(UHI) over Guang-zhou City were analyzed in a tropical cyclone affected situation for early August *** particular,two thunderstorms occurring during this period respectively at the night of 4 August and in the afternoon of 7 August were investigated to study the relationships between the development of thunderstorms and the *** showed that two thunderstorms were associated with the UHI *** induced local air convergence and initiated the thunderstorm *** cases showed a general agreement in time and space for the locations of maximum UHI,convergence,convection,and *** was found to be more favorable to developing in time periods and locations with stronger intensity of *** also showed that,due to the urban effects,both thunderstorms got strengthened when moving over guangzhou City,with maximum radar echoes observed right over the urban area and precipitation located within the *** these features reveal that two thunderstorms were urban-induced storms.

关键词： summer thunderstorms, urban heat islands (UHI), urban effects, tropical cyclone

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