基于成像光谱仪MODIS的近十年武汉水汽含量变化分析  

Analysis of Atmospheric Precipitable Water Vapor over Wuhan Based on MODIS Data in Recent Ten Years

作　　者：张金业[1,2] 于秀丽[1,2] 吕辉[1,2] 朱进容[1,2] 

机构地区：[1]湖北工业大学理学院,武汉430068 [2]湖北工业大学太阳能高效利用湖北省协同创新中心,武汉430068

出　　处：《光子学报》2014年第10期102-107,共6页Acta Photonica Sinica

基　　金：国家自然科学青年基金(No.41301372);湖北省自然科学基金(No.2012FFB00704);测绘遥感信息工程国家重点实验室开放基金(No.12R01);湖北省教育厅科研计划项目(No.B20121403);博士科研启动项目(No.BSQD12079)资助

摘　　要：应用中分辨率成像光谱仪近红外通道数据进行大气水汽含量反演.采用三通道比值加权平均法用于武汉地区大气水汽含量反演,将反演结果与EOS发布的水汽产品进行对比,验证了该反演算法的可信性.借助遥感影像处理软件ENVI,利用三通道比值加权平均法反演了武汉地区近十年(2001-2011)的大气水汽含量,结合武汉地区实际地理位置、气候条件和城市发展现状,分析了武汉地区大气水汽含量变化.结果表明:武汉地区大气水汽含量在秋季和冬季呈明显减少趋势.借助统计软件SPSS对中分辨率成像光谱仪反演的大气水汽含量与地面气象探测因子气压、气温和相对湿度之间做回归分析,结果表明:大气水汽含量与气温呈正相关,气压呈负相关,和相对湿度的相关性不大,但在温度一定时,两者呈正相关.The algorithm for retrieving atmospheric Precipitable Water Vapor（PWV）was introduced by several Moderate Resolution Imaging Spectroradiometer（MODIS）near-IR channels.Three-channel ratio weighting method is applicable for water vapor retrieval over Wuhan by comparing several commonly used algorithms.The credibility of the algorithm is verified in contrast to the EOS water vapor products.The PWV in recent ten years（2001-2011）over Wuhan were analyzed by the three-channel ratio weighting method with the aid of remote sensing image processing software ENVI combined with actual geographical location,climate conditions and urban status of the development.The results show that the PWV over Wuhan has a distinct decreasing trend in the autumn and winter.With the help of scientific statistical software SPSS,unary regression model was used to analyze the relationship between the MODIS derived PWV and ground-based meteorological factors,such as temperature,pressure and relative humidity.The results show that PWV derived from MODIS has positively correlated with temperature,negatively correlated with pressure,has little correlation with relative humidity,except that when the temperature is the same,in which condition the two are positively related.

关 键 词：遥感 中分辨率成像光谱仪 水汽含量 回归分析 气象因子 

分 类 号：P412.27[天文地球—大气科学及气象学]