成都市晴天热岛效应的时空分布特征与成因

应用生态学报

成都市晴天热岛效应的时空分布特征与成因

张顺谦^1,2**,周长艳¹

(¹中国气象局成都高原气象研究所, 成都 610071; ²四川省气候中心, 成都 610071)

出版日期:2013-07-18 发布日期:2013-07-18

Spatiotemporal distribution characteristics and causes of sunny days’ heat island effect in Chengdu City of Southwest China.

ZHANG Shun-qian^1,2, ZHOU Chang-yan¹

(¹Institute of Plateau Meteorology, China Meteorological Administration, Chengdu 610071, China; ²Sichuan Provincial Climate Center, Chengdu 610071, China)

Online:2013-07-18 Published:2013-07-18

摘要/Abstract

摘要：

基于一种新的郊区温度自动提取方法——圈层温度跃变法、以及2005—2010年99幅Terra卫星遥感资料,分析了2005—2010年成都市热岛效应的时空变化特征,并初步分析了其变化成因.结果表明:研究期间,成都市面积最大、强度最强的热岛强中心区位于城区西南面的金花镇片区;热岛效应在空间上未发生明显改变,但范围在缩小、强度在变弱;年内的各环路热岛强度和面积均呈三峰型分布,峰值分别出现在4、7、10月,其中,7月的热岛强度峰值最大.成都市热岛强度的减弱是气温下降、降水增多和城区植被覆盖度提高共同作用的结果.

Abstract: Based on 99 clear sky Terra satellite images of Chengdu City in 2005-2010, and by using a novel automatic extraction method of suburb temperature, i.e., each citycircle temperature jump, this paper studied the spatiotemporal variation characteristics of the urban heat island (UHI) effect in the City in 2005-2010, and analyzed the causes of the variation characteristics. In the study period, the central area of the largest and strongest UHI was in the Jinhua Town located in the southwest of Chengdu. The UHI effect had no significant spatial variation, but the range and intensity of the UHI effect tented to be decreased. The intra-annual UHI intensity and area within the ring roads showed a threepeak distribution pattern, with the peak values appeared in April, July, and October, and the intensity reached the maximum in July. The UHI intensity in Chengdu was attenuated by the decrease of air temperature and the increase of precipitation and urban vegetation cover.

张顺谦1,2**,周长艳1. 成都市晴天热岛效应的时空分布特征与成因[J]. 应用生态学报.

ZHANG Shun-qian1,2, ZHOU Chang-yan1. Spatiotemporal distribution characteristics and causes of sunny days’ heat island effect in Chengdu City of Southwest China.[J]. Chinese Journal of Applied Ecology.