欢迎访问《环境科学学报》编辑部网站！

快速检索			高级检索

研究报告

吴硕秋,马晓燕.利用风云四、MODIS及CALIPSO卫星资料分析西北沙尘过程的垂直和水平分布特征[J].环境科学学报,2020,40(8):2892-2901

Analysis of dust vertical and horizontal distribution during dust events in northwest China based on FY-4A,MODIS and CALIPSO satellite data

摘要：FY-4A提供的高时间分辨率沙尘强度产品为分析沙尘过程中气溶胶分布提供了新的思路.本研究使用MODIS暗像元/深蓝/合成算法的AOD产品以及FY-4A沙尘强度产品，分析了2018年春季中国西北地区的两次典型沙尘过程，并使用CALIPSO后向散射系数产品研究了这两次事件中气溶胶的垂直分布特征.研究结果表明：①风云四号沙尘强度产品与MODIS深蓝算法产品以及合成算法产品在西北沙漠地区的沙尘分布情况上具有很好的空间一致性；②对于沙尘有明显向东输送的沙尘过程而言（如2018年4月4—6日），沙尘主要分布在2~6 km，有些地区甚至只有4 km以上才存在沙尘，在沙尘输送的下游地区，沙尘主要分布在2 km以下的低空；而对于沙尘没有向外扩散的沙尘过程（如2018年5月21—23日），沙尘粒子则主要分布在0~5 km高度处.

Abstract：High time resolution IDDI-BK product provided by FY-4A provides a new idea for us to analyze the aerosol distribution during dust events. Using MODIS AOD from dark target, deep blue, and combined algorithm, as well as FY-4A IDDI-BK product, we analyzed two dust events in northwestern China in spring of 2018, and further studied the vertical distribution of aerosols during these two events using CALIPSO backscatter coefficient products. The results show that: ①Compared with MODIS Deep Blue product and Combined product,FY-4A IDDI-BK product have good spatial consistency in the distribution of dust over the desert area of Northwest China; ②For the dust process with obvious dust transport to the east (such as April 4—6, 2018), dust is mainly distributed in 2~6 km and even distributes above 4 km in some areas. In the downstream area of dust transportation, dust is mainly distributed below 2 km. For the dust processes without apparent transport (such as May 21—23, 2018), dust is mainly localized below 5 km.