【作者】 田永丽； 张万成； 陈新梅； 和春荣；

【Author】 Tian Yongli1 Zhang Wancheng2 Chen Xinmei2,3 He Chunrong4 1(Yunnan speciality meteorological observator,Kunming,650034) 2(Yunnan institute of meteorology,Kunming,650034) 3(Department of Atmosphere Science,Yunnan University,Kunming,650091) 4(Di Qing county meteorological agency,Shangri-la atmospheric background stand,Shangri-la,674400)

【机构】 云南省专业气象台； 云南省气象科学研究所； 云南大学大气科学系； 迪庆州气象局香格里拉大气本底站；

【摘要】 本文采用2008年卫星遥感西南地区的气溶胶产品开展季节变化研究,并利用四川盆地内的成都和云南香格里拉大气本底站全自动太阳分光光度计CE318观测的资料进行分析,结果表明西南地区四季的气溶胶光学厚度(AOD)呈西低东高的分布特征,总体上AOD在春季大值范围最大,夏季最小,秋季次之,但冬季AOD强度最大;西南地区的西部AOD在春季最大,夏季开始减小,秋季次之,冬季最小;而东部地区有二个明显的大值区:四川盆地大值区,黔、渝、湘交界大值区。成都地区观测的AOD季节变化与MODIS反演的四川盆地气溶胶分布特征吻合,成都地区日平均气溶胶整体偏高,基本变化范围在0.5—2.5之间,而日变化呈准双峰型。香格里拉观测的AOD季节变化具有明显的双峰型,总体上看AOD日变化从日出到日落呈上升趋势。更多还原

【Abstract】 The characteristics and seasonal changes of the aerosol optical depth(AOD)distribution of the southwest China from MODIS products and sun-photometer CE318 observations at Chengdu and Shangri-la in 2008 are analyzed.The results show the main distribution feature of AOD from MODIS over southwest is high west and low east in different season.The regional large value area is largest in spring,and the value is smallest in winter.The biggest AOD value in the west of southwest China is at sprint,the bigger is at summer,and the smallest is at winter.There are two regional large value areas in the east of southwest China,one is in the Sichuan Basin,and another is in the region between Guizhou,Chongqing and Hunan.The AOD of sun-photometer observations at Chengdu shows seam distribution characters of MODIS with seasons.The daily average value of AOD at Chengdu is on the high side,and is distributed around 0.5-2.5.The daily variation of AOD is a quasi-double periodicity.The AOD of sun-photometer observations at Shangri-la is an obvious double periodicity with seasons.The daily variation of AOD at Shangri-la is increasing form sunrise to sunset.更多还原