Urban effects and summer thunderstorms in a tropical cyclone affected situation over Guangzhou city |
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摘 要: |
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收稿时间: | 29 April 2007 |
修稿时间: | 20 July 2007 |
Urban effects and summer thunderstorms in a tropical cyclone affected situation over Guangzhou city |
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Authors: | Meng WeiGuang Yan JingHua Hu HaiBo |
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Institution: | 1. Institute of Tropical and Marine Meteorology, Chinese Meteorological Administration CMA, Guangzhou 510080, China;State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing 100081, China 2. Institute of Tropical and Marine Meteorology, Chinese Meteorological Administration CMA, Guangzhou 510080, China 3. Institute of Urban Meteorology, CMA, Beijing 100089, China |
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Abstract: | With data mainly from Guangzhou mesonet Automatic Weather Stations (AWS), Guangzhou Doppler Radar and satellite T
BB
data, characteristics and evolution of the urban heat island (UHI) over Guangzhou City were analyzed in a tropical cyclone
affected situation for early August 2005. In 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 UHI. Results showed that two thunderstorms were associated with the UHI effects. UHI induced local air
convergence and initiated the thunderstorm convections. Both cases showed a general agreement in time and space for the locations
of maximum UHI, convergence, convection, and precipitation. Convection was found to be more favorable to developing in time
periods and locations with stronger intensity of UHI. Analysis 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 city. All these features reveal that two thunderstorms were urban-induced storms.
Supported jointly by the R&D Infrastructure and Facility Developemnt Program (2003DIB4J145) from the Ministry of Science and
Technology of China, Urban Meteorological Science Research Fund (UMRF200504) and the Open Research Fund from the State Key
Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences |
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Keywords: | summer thunderstorms urban heat islands (UHI) urban effects tropical cyclone |
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