【摘要】 Himawari-8是由日本气象局发射的新一代静止气象卫星,其搭载的传感器AHI(Advanced Himawari Imager)可实现10 min/次的高时间分辨率对地观测。本文将2015年9月至2017年12月Himawari-8卫星Level-2气溶胶光学厚度(AOD)产品与AERONET(AErosol RObotic NETwork)70个站点的地基观测数据进行对比验证分析,结果表明Himawari-8卫星反演的气溶胶光学厚度产品的精度存在很大的空间上的差异性,其中有48个站点Himawari-8 AOD与AERONET AOD之间存在较好的相关性(R>0.5),有22个站点Himawari-8卫星反演气溶胶光学厚度产品存在明显的低估现象。在American_Samoa、Bandung、Birdsville、Bukit_Kototabang、Canberra、Fowlers_Gap、Jabiru以及QOMS_CAS等站点出现地基观测值很小而卫星反演的气溶胶光学厚度较大的情况。对绝对误差(Himawari-8 AOD与AERONET AOD的差)进行分析发现Himawari-8 AOD存在低估现象时绝对误差与AERONET AOD之间存在较好的相关性;在地基观测值很小而Himawari-8卫星反演AOD较大的地区绝对误差与Himawari-8 AOD之间存在较好的线性关系,这为Himawari-8 AOD反演算法的改进与完善提供了有用的研究发现。更多还原

【Abstract】 Himawari-8 is a new generation of geostationary meteorological satellites launched by the Japan Meteorological Administration. The advanced Himawari imager(AHI) sensor carried by Himawari-8 can achieve a high temporal resolution observation for 10 min/time. Level-2 aerosol optical depth(AOD) dataset from Himawari-8 satellite was compared with AERONET(AErosol RObotic NETwork) AOD at 70 sites from September 2015 to December 2017.The results show that the precision of AOD products retrieved by Himawari-8 satellite has a large spatial difference.Among them, 48 sites feature a good correlation between Himawari-8 AOD and AERONET AOD(R>0.5). The Himawari-8 AOD clearly underestimates the ground-based AOD at 22 sites. At some sites, including American_Samoa,Bandung, Birdsville, Bukit_Kototabang, Canberra, Fowlers_Gap, Jabiru, and QOMS_CAS, ground-based AODs are small and Himawari-8 satellite-retrieved AOD is large. Analysis of the absolute error(the difference between Himawari-8 AOD and AERONET AOD) shows that a good correlation exists between absolute error and AERONET AOD when the Himawari-8 AOD underestimates ground-based observations. In areas where ground-based observations are small and satellite inversion data are large, a good linear relationship exists between absolute error and Himawari-8 AOD. This provides useful basic information for the improvement and perfection of the Himawari-8 AOD inversion algorithm.更多还原