快速城市化区域城市热岛及其环境效应研究

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Abstract

The regions were urbanized more and more rapidly in Zhujiang Delta. The Urban Heat Island(UHI) became more and more serious and affected the ecological environment seriously. The research of UHI and its environmental effects was propitious to the city planning and its continuable development. The non-hydrostatic mesoscale model MM5 was used to simulate UHI and its environmental effects in Guangzhou with four-fold nesting and the finest mesh resolution of 1 km. The air temperature from MM5 and automatic weather stations(AWS) was very close at 11:00, and the land surface temperature(LST) from MM5 and the Landsat Enhanced Thematic Mapper Plus(ETM+) had similar characteristic. The result shown the project of MM5 could simulate UHI and its effects well and truly. The UHI appeared with the Urban Dry Island(UDI). The Urban Heat Island intensity(UHII) was less at 02:00 and 11:00 than at 20:00, and the relative humidity had the reverse change characteristic. The prevailing wind directory and speed were changed in the regions of UHI. The result also showed that wetland landscape, urban green-land and river availably divided up the UHI and UDI, and caused their fractions increasing. Therefore, the three landscapes adjusted the urban climate effectively.

Key words： Urban Heat Island MM5 Environmental effects Urban Dry Island Guangzhou

Received: 25 April 2006

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	JIANG Xue-ding
	XIA Bei-cheng

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JIANG Xue-ding,XIA Bei-cheng. Research on Urban Heat Island and its Environmental Effects of Rapidly Urbanized Regions[J]. , 2006, 25(2): 171-175.

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http://www.ecolsci.com/EN/ OR http://www.ecolsci.com/EN/Y2006/V25/I2/171

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