基于HJ-1卫星数据反演长沙市气溶胶光学厚度  

Inversion of aerosol optical depth based on the measurement of HJ-1 satellite in Changsha city

作　　者：周碧[1] 廖玉芳 韩沁哲[1] 高霞霞 段丽洁[2] 杜东升 邓剑波[1] ZHOU Bi;LIAO Yu-fang;HAN Qin-zhe;GAO Xia-xia;DUAN Li-jie;DU Dong-sheng;DENG Jian-bo(Hunan Institute of Meteorological Sciences/Key Laboratory of Hunan Province for Meteorological Disaster Prevention and Mitigation,Changsha 410118,China;Hunan Climate Center,Changsha 410118,China)

机构地区：[1]湖南省气象科学研究所/气象防灾减灾湖南省重点实验室,长沙410118 [2]湖南省气候中心,长沙410118

出　　处：《湖北农业科学》2019年第17期51-55,共5页Hubei Agricultural Sciences

基　　金：中国气象局气候变化专项（CCSF201839）;湖南省自然科学基金面上项目（2017JJ2148）;湖南省气象局预测预报能力建设专项(YBNL16-13-2)

摘　　要：利用HJ-1卫星可见光相机(CCD)和红外相机(IRS)数据,采用扩展暗像元法,经过辐射定标、像元提取、云像元剔除、6S辐射传输模式查算等过程,反演了长沙市气溶胶光学厚度(AOD)。结果表明,长沙市AOD分布河东高于河西,市区及周边大部分地区在0.7以上,但也存在典型低值区,远郊大部分地区AOD分布在0.3~0.5。AOD分布的3处典型高值区分别为望城区湘江北路与湘江之间的霞凝港学校-新塘冲-长塘(AOD为1.4~1.6)、四方坪立交桥与鸭子铺路之间的区域(AOD为1.3~1.5)、雨花区长沙火车南站北侧区域(AOD为1.5~1.8);3处典型低值区分别为岳麓区岳麓山-梅溪湖-桃花林公园、谷山林场、雨花区湖南省林业厅-湖南省林业科技示范园-天际岭公园-湖南省植物园。将AOD与观测得到的PM10、PM2.5浓度进行对比发现,AOD分布与PM10浓度分布具有较好的一致性。Based on the data of the CCD and IRS from HJ-1 satellite,the aerosol optical depth (AOD) in Changsha city was determined by the extended dark pixel algorithm with the processes of radiation calibration,pixels extracted,cloudy pixels deleted and 6S radiation transmission model used.The results show that the AOD in the east side of the Xiang River is higher than that in the west side.The values of AOD are more than 0.7 in the most of urban areas and surrounding with also typical low AODs existed,while they are between 0.3 and 0.5 in the outer suburbs.The typical high values of AOD distribute three places.One is located in Wangcheng district between the north of Xiang river road and Xiang river containing the Xianinggang School,Xintangchong,and Changtang,with the AOD between 1.4 and 1.6.One is located between Sifangping overpass and Yazipu road,with the AOD between 1.3 and 1.5.The last is located in Yuhua district in the north area of the south station of Changsha,with the AOD between 1.5 and 1.8.There are also three regions with low AOD in the city: The first is located in the belt of Yuelu mountain-Meixi lake-Taohua hill,while the second is located in Gushan forest farm and the third is located in the belt of Hunan Province Forestry Bureau and Hunan Forestry Science and Technology Demonstration Park-Tianji mountain park-Hunan Botanical Garden.The comparative analysis results betwwen inversed AOD and the concentrations of PM10 and PM2.5 show that the distributions between AODs and the concentrations of PM10 have a good consistency.

关 键 词：HJ-1卫星 气溶胶光学厚度 雾霾 空间分布 长沙市 

分 类 号：P407.4[天文地球—大气科学及气象学]