张颖蕾,崔希民.京津冀地区MODIS 3 km气溶胶光学厚度产品与10 km产品的对比分析[J].环境科学学报,2020,40(2):429-437
京津冀地区MODIS 3 km气溶胶光学厚度产品与10 km产品的对比分析
- A comparative study of MODIS 3 km aerosol optical depth products and 10 km products in the Beijing-Tianjin-Hebei region
- 基金项目：国家自然科学基金（No.51474217）；中央高校基本科研业务费专项资金（No.2010YD08）
- 张颖蕾
- 中国矿业大学(北京)地球科学与测绘工程学院, 北京 100083
- 崔希民
- 中国矿业大学(北京)地球科学与测绘工程学院, 北京 100083
- 摘要：本文以京津冀为研究区，对该地区的大气气溶胶光学厚度的分布及变化进行分析.利用AERONET地基观测的气溶胶光学厚度（AOD）数据，对最新发布的MODIS/Aqua C6.1 3 km AOD产品在京津冀地区的适用性进行验证，并将3 km产品与MODIS/Aqua C6.1 10 km产品进行对比.分析结果表明：MODIS 3 km AOD产品比AERONET地基AOD的相关性高，相关系数达到了0.95；与MODIS 10 km AOD产品相比，其下垫面为城市地区的反演精度低；在时空分布上，MODIS 3 km AOD产品更好的呈现了气溶胶梯度变化，季平均结果中，四季3 km AOD值都略高于10 km产品.以上结论可为MODIS 3 km AOD产品在京津冀地区的使用提供了借鉴与参考.
- Abstract：In this paper, the spatial-temporal characteristics of aerosol loading over Beijing-Tianjin-Hebei region are investigated. The applicability of the latest released MODIS/Aqua C6.1 3 km AOD products in the Beijing-Tianjin-Hebei region are evaluated with Aerosol Robotic Network (AERONET) ground-based observations. Moreover, the 3 km products are also compared with MODIS/Aqua C6.1 10 km products. The results demonstrate that the correlation between MODIS 3 km AOD and AERONET AOD is high to the level of 0.95. However, 3 km AOD products also have lower retrieval accuracy with urban underlying surface than 10 km products. The results of spatial and temporal distribution reveal that 3 km AOD products provided a better aerosol gradient. Seasonal comparisons show the 3 km AOD products are slightly higher than the 10 km products in all seasons. The conclusions above can provide references for the application of MODIS 3 km AOD products in the Beijing-Tianjin-Hebei region.
