摘要
本文以2006年1、2、7、8月、2007年1月和2008年7月天空状况晴朗的NOAA16和NOAA18的AVHRR白天和夜晚的遥感资料为基础,利用地理信息系统,分析成都市中心城区与近郊不同季节昼间、夜晚遥感监测的量温大小;研究昼、夜亮温的空间分布;使用统计方法,分析亮温与下垫面性质的关系。结果表明:成都市夏季城市白天平均热岛强度最大,为3.7℃,冬季白天城市平均热岛强度最小,只有0.5℃,夏季夜晚平均热岛强度为1.5℃,冬季夜晚为0.6℃;尽管成都中心城区平均亮温高于近郊,但亮温的分布并不一定逐渐降低的,且冬季夜间亮温的高值区大部分不在中心城区;夏、冬季的白天和夜晚亮温的分布也不尽一致。统计分析表明城市热岛的强度与地表植被指数呈负相关,夏季的相关性很好,显著性水平达到0.01,而冬季的相关性较差,显著性水平也比较低。
In this paper,based on remote dayAnight sensing data in January,February,July,August of 2006 and January 2007 and July 2008 from NOAA16 and the NOAA18 AVHRR,it analyzes the bright temperature in the central region and the suburbs of Chengdu in different seasons with the geographic information systems,,it studies the spatial distribution of heat island on the day and night of Chengdu city and the relationship between the heat island intensity and the underlying surface.The results show that： in summer,the average intensity of daytime urban heat island is the largest in Chengdu,about 3.7 ℃;in winter,the intensity is the leastt,only 0.5 ℃,the average intensity is 1.5 ℃in summer night and 0.6 ℃ in winter night.Statistical analysis show that the urban heat island intensity and surface vegetation index was negatively,the relevance of the summer is good and the significance level is 0.01,while in winter,the relevance is poor and the significance levels are relatively low.
出处
《高原山地气象研究》
2010年第3期48-51,共4页
Plateau and Mountain Meteorology Research
