基于MODIS的近红外大气水汽含量的反演及其与地基GPS水汽的对比分析  

Comparison Analysis between Water Vapor Retrieved from MODIS Near-IR and Ground-based GPS Water Vapor

作　　者：李艳永[1,2] 崔彩霞 赵玲[2] 卢新玉[1,2] 崔丽娜[1,2] 

机构地区：[1]新疆师范大学地理科学与旅游学院,新疆乌鲁木齐830054 [2]中国气象局乌鲁木齐沙漠气象研究所,新疆乌鲁木齐830002 [3]新疆气象台,新疆乌鲁木齐830002

出　　处：《沙漠与绿洲气象》2010年第6期30-33,共4页Desert and Oasis Meteorology

基　　金：新疆维吾尔自治区科技支疆项目(200891129)资助

摘　　要：利用ENVI4.5软件对2007年7—9月间23 d的MODIS 1B晴空数据进行水汽的反演,从中提取乌鲁木齐地区水汽含量并与地基GPS水汽数据进行对比分析,发现经过MODIS 1B反演的近红外水汽相对于地基GPS水汽偏小,但两者的变化趋势基本一致。通过MODIS近红外水汽的订正公式对反演的水汽进行订正,可使乌鲁木齐地区MODIS晴空像元大气水汽含量精度明显提高。By use of the ENVI 4.5 software,this paper retrieved the water vapor content of atmosphere based on MODIS 1B clear sky data of total 23 days during Jul.-Sep.2007,and contrasted and analyzed the MODIS precipitable water vapor（PWV） in Urumqi and ground-based GPS PWV.The results showed that the retrieval PWV used by MODIS 1B data was lower than GPS PWV,but the variety trends of both showed good consistency each other.The MODIS PWV was corrected by the corrected formula,the precision of corrected PWV of MODIS increased obviously.

关 键 词：水汽 MODIS GPS 

分 类 号：P407[天文地球—大气科学及气象学]