基于MODIS的三峡库区(重庆段)地表温度格局  

Distribution pattern of land surface temperature in the Three Gorges Reservoir Region ( Chongqing section) of China based on MODIS

作　　者：冯茹[1] 孟翔飞[1] 魏虹[1] 彭月[1] 

机构地区：[1]三峡库区生态环境教育部重点实验室,西南大学生命科学学院,重庆400715

出　　处：《生态学杂志》2013年第9期2398-2406,共9页Chinese Journal of Ecology

基　　金：国家林业公益性行业科研专项(201004039);重庆市基础与前沿研究计划重点项目(CSTC2013JJB00004);中央高校基本科研业务费专项资金(XDJK2013A011)资助

摘　　要：选取2003—2009年的MOD11C3地表温度遥感数据,运用GIS技术,分析了三峡库区(重庆段)大坝建成蓄水前后的地表温度空间分布格局及时间变化规律。同时,为了验证地表温度的变化规律,选取了位于库区内的4个国家基本气象站的同期年均气温数据与地表温度数据进行比对。结果表明:受海拔、纬度和地被覆盖物的影响,三峡库区(重庆段)地表温度整体上表现为西南高,东北低;库区有两个热源中心和两个冷源中心,热源中心以库区西南部的主城区和江津区为主,冷源中心主要以库区东北部的巫溪、巫山北部和库区东南部为主;库区多年的平均地表温度由大坝建成蓄水之前的18.2℃,上升到大坝建成蓄水后的18.6℃,略有上升;三峡大坝建成蓄水后,重庆段库区的地表温度季节性变化较为明显,春季、秋季、冬季有明显的增温趋势,夏季有明显的降温趋势;与同期4个国家气象站点的年均气温数据进行对比后发现,地表温度的变化规律和气温的变化规律有较好的相关性。Based on the MOD11C3 data of land surface temperature （LST） in 2003-2009, and by using GIS technology, this paper analyzed the spatial distribution pattern of the LST in the Three Gorges Reservoir Region （Chongqing section） before and after the construction of the Dam. Meanwhile, the mean annual air temperature data from four weather stations and related LST were compared to identify the change pattern of the LST. As affected by altitude, latitude, and vegetation cover, the LST in the Three Gorges Reservoir Region （Chongqing section） was generally higher in southwest area and lower in northeast area. Due to the thermal effect of water, there were two high temperature regions and two low temperature regions. The high temperature regions were mainly in the southwest part, whereas the low temperature regions were mainly in the southeast part. The mean LST increased from 18.2℃ before the construction of the Dam to 18.6 ℃ after the construction of the Dam, but the increment was not significant. There was an obvious seasonal variation of the LST in the Three Gorges Reservoir Region （ Chongqing section） after the construction of the Dam. The LST increased in spring, autumn, and winter, but de- creased in summer. The change pattern of the LST had good correlation with that of the air tem- perature.

关 键 词：MODIS 三峡库区（重庆段） 地表温度 

分 类 号：P423[天文地球—大气科学及气象学]