摘要
基于6S模型对比分析了3种大气气溶胶模式在北京地区夏季气溶胶光学厚度反演中的适用性.首先下载Terra-MODIS L1B夏季空间分辨率为1,km的数据,基于城市型、大陆型、海洋型3种标准大气气溶胶模式生成了3套查找表,利用暗像元法,反演得到了北京地区夏季大气气溶胶光学厚度.然后利用AERONET提供的实测陆地气溶胶光学厚度对反演结果进行精度验证.结果表明:海洋型和大陆型气溶胶模式反演的气溶胶光学厚度与地基数据相关性较高,相关系数分别为0.806,6和0.766,4;而城市型气溶胶模式反演的气溶胶光学厚度与地基数据存在明显差异,相关系数仅为0.482,5;将晴天和雾霾天气反演结果与地基数据进行对比,可以看出在天气晴朗时北京地区采用海洋型气溶胶模式反演气溶胶光学厚度更为准确.
The applicability of three kinds of atmospheric aerosol models to Beijing aerosol optical depth（i.e,AOD）inversion in summer was studied and compared based on 6S model.Firstly,the Terra-MODIS L1B data in summerwere downloaded,whose spatial resolution was 1,km,and then three look-up tables（LUT）were created based oncontinental,marine and urban standardization aerosol models and the AOD values of Beijing in summer was retrieved usingdense dark vegetation algorithm.After that,the accuracy of the retrieved results was verified against the real land AOD datafrom AERONET.The results showed that the AOD inversion results of marine model and continental aerosol model have thehigh relativity with AERONET data,and the correlation coefficient is 0.806,6 and 0.766,4,respectively.There were obviousdifferences between the AOD inversion results of urban model and AERONET data;the correlation coefficient was only0.482,5.The retrieved AOD results during clear days and haze/fog days were compared with AERONET data,which showedthat it was more accurate to retrieve the AOD using the marine model on clear summer days over the urban area of Beijing.
出处
《天津科技大学学报》
CAS
北大核心
2016年第2期51-56,共6页
Journal of Tianjin University of Science & Technology
基金
天津市自然科学基金资助项目(14JCYBJC22500)
