基于MODIS数据的石羊河流域地表温度空间格局

doi:10.7522/j.issn.1000-0240.2013.0007

冰川冻土 ›› 2013, Vol. 35 ›› Issue (1): 57-64.doi: 10.7522/j.issn.1000-0240.2013.0007

基于MODIS数据的石羊河流域地表温度空间格局

魏伟¹, 石培基¹, 杨旺明¹, 王旭峰², 王雪平³

1. 西北师范大学地理与环境科学学院, 甘肃兰州 730070;
2. 中国科学院寒区旱区环境与工程研究所, 甘肃兰州 730000;
3. 兰州理工大学土木工程学院, 甘肃兰州 730050

收稿日期:2012-09-08 修回日期:2012-12-22 出版日期:2013-02-25 发布日期:2013-07-22
作者简介:魏伟(1982-),男,甘肃庄浪人,讲师,2009年毕业于西北师范大学,现主要从事GIS和RS的应用研究.E-mail:weiweigis2006@126.com
基金资助:
国家自然科学基金项目(41261104); 国家社科基金青年项目(12CTJ001); 甘肃省青年科技基金计划项目(1107RJYA077)资助

Spatial Distribution of Land Surface Temperature in Shiyang River Basin Based on MODIS Data

WEI Wei¹, SHI Pei-ji¹, YANG Wang-ming¹, WANG Xu-feng², WANG Xue-ping³

1. College of Geographical and Environment Science, Northwest Normal University, Lanzhou Gansu 730070, China;
2. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou Gansu 730000, China;
3. School of Civil Engineering, Lanzhou University of Technology, Lanzhou Gansu 730050, China

Received:2012-09-08 Revised:2012-12-22 Online:2013-02-25 Published:2013-07-22

摘要/Abstract

摘要：

利用2010年4期MODIS影像, 基于植被指数、地表比辐射率、大气透过率和星上亮度温度, 采用分裂窗口算法, 反演石羊河流域不同季节地表温度并对其进行验证. 结果表明: 石羊河流域四季地表温度变化明显, 昼夜温差很大, 其中, 春季温度分布在-13.45~29.27℃之间; 夏季温度分布在-3.75~56.29℃之间; 秋季温度分布在-10.15~32.67℃之间; 冬季温度分布在-17.15~12.75℃之间. 从地表温度空间分布上看, 在武威、民勤、古浪等绿洲地区地表热量丰富, 水土和植被效应显著, 热量呈圈状空间递减趋势; 在下游地区腾格里沙漠和巴丹吉林沙漠地区夏季温度最高, 祁连山东端的石羊河上游地区由于受常年积雪、河流、地表植被和海拔等因素影响地表温度较低. MODIS数据为宏观小流域热环境监测提供了新的途径, 且将遥感数据和地表下垫面数据相结合能提高反演精度.

关键词: 小流域热环境, 地表温度反演, 分裂窗口算法, MODIS, 石羊河流域

Abstract:

In this paper, the calculations of some parameters such as brightness temperature, atmospheric transmittance, surface emissivity and vegetation index are discussed. Then the land surface temperatures are calculated by using MODIS split windows algorithm of NASA on the base of cloudless MODIS thermal infrared data which were collected seasonally in 2010. It is found that the distribution of land surface temperatures is very different in different seasons and different regions. In spring, the land surface temperature varies between -13.45℃ and 29.27℃. In summer, it varies between -3.75℃ and 56.29℃. In autumn, it varies between -10.15℃ and 32.67℃. In winter, it varies between -17.15℃ and 12.75℃. There are three land surface temperature zones from south to north. The temperature is very high in Wuwei, Minqin and Gulang oasis, where heat is rich and the domino effect among water, soil and vegetation are obvious. In the downstream Tengger Desert and Badain Jaran Desert, land surface temperature is extremely high in summer. Comparatively, in Qilian Mountains the temperature is very low because of perennial snow, high elevation and special land surface vegetation. In addition, MODIS data are able to supply a new way for monitoring thermal environmental change in a small basin. Especially, the derived results will be improved a lot if combine the MODIS data and surface observation.

Key words: thermal environment in a small basin, land surface temperature, split window algorithm, MODIS, Shiyang River basin

中图分类号:

P407

魏伟, 石培基, 杨旺明, 王旭峰, 王雪平. 基于MODIS数据的石羊河流域地表温度空间格局[J]. 冰川冻土, 2013, 35(1): 57-64.

WEI Wei, SHI Pei-ji, YANG Wang-ming, WANG Xu-feng, WANG Xue-ping. Spatial Distribution of Land Surface Temperature in Shiyang River Basin Based on MODIS Data[J]. JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY, 2013, 35(1): 57-64.

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基于MODIS数据的石羊河流域地表温度空间格局

Spatial Distribution of Land Surface Temperature in Shiyang River Basin Based on MODIS Data

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