用MODIS遥感中国西南地区气溶胶光学厚度的对比研究  

The comparison of modis data and sun-photometer observations of aerosol optical depth over southwest China

作　　者：张万诚[1] 田永丽[2] 和春荣 施建国[1] 谢国清[4] 陈新梅[1] 段玮[1] 

机构地区：[1]云南省气象科学研究所,云南昆明650034 [2]云南省气象科技服务中心,云南昆明650034 [3]迪庆州气象局香格里拉大气本底站,云南香格里拉674400 [4]云南省农业气象与卫星遥感应用中心,云南昆明650034

出　　处：《云南大学学报（自然科学版）》2009年第S2期421-425,共5页Journal of Yunnan University(Natural Sciences Edition)

基　　金：中国气象局新技术推广项目(CMATG2008M51);科技部"温室气体及相关微量成分时空变化与影响评估资助项目(GY-HY200806026-06)

摘　　要：西南地区四季地表植被比较密集,利用MODIS资料反演2008年西南地区气溶胶光学厚度(AOD),并与成都和香格里拉安装的太阳分光光度计CE318资料进行对比,成都的气溶胶与MODIS的气溶胶均方根偏差(RMS)为0.17,相关系数为0.74,拟合线的斜率非常接近1.0;而香格里拉的MODIS反演气溶胶与太阳光度计的观测值相比误差偏大.表明MODIS反演气溶胶产品能够满足气候变化和环境研究的要求,可以在西南地区业务化应用.2008年西南地区气溶胶分布呈西低东高的分布形势,大值区位于四川盆地内,中心分布在成都附近、宜宾沿长江流域至重庆、南充及其以东以南地区,其值在0.4～0.65;云南地区气溶胶厚度最小,大部地区不超过0.15.广西大部和越南东北部也存在一片明显的AOD大值区,其值在0.2以上.The ground vegetation in four seasons of southwest China is comparatively dense,so the using of MODIS aerosol products are doable in the area.The aerosol products from MODIS are compared with the results from the sun-photometer CE318 observations at Chengdu and Shangrila in 2008.The results show that the root mean square deviation(RMS)is 0.17,the correlation coefficient is 0.74 and the slope of the line fitting is very close to 1.0 between MODIS data and the sun-photometer observations at Chengdu.Moreover,the results also show the deviation is obvious between MODIS data and the sun-photometer observations at Shangrila.We found that the aerosol products from MODIS are sufficient for the research requirements of climatic and environmental change.The regular application of the MODIS data over southwest China is quite feasible.The main distribution feature of the aerosol optical depth(AOD)over southwest is high west and low east in 2008.The primary regional large value area is located in Sichuan Basin.Its value centers are situated on Chengdu,Yibing to Chongqing along Yangtze River and southeastern Nanchong.The number range of AOD over this region is distributed around 0.4～0.65.The next regional large value center is between most of Guangxi province and northeast Vietnam,its number lever is greater than 0.2.The minimum value region is located in Yunnan province and its number lever is lesser than 0.15.

关 键 词：西南地区 MODIS 气溶胶光学厚度 遥感 

分 类 号：P237[天文地球—摄影测量与遥感] P427.1[天文地球—测绘科学与技术]