Quasi-Global Maps of Daily Aerosol Optical Depth From a Ring of Five Geostationary Meteorological Satellites Using AERUS-GEO
Quasi-Global Maps of Daily Aerosol Optical Depth From a Ring of Five Geostationary Meteorological Satellites Using AERUS-GEO
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DOI：
10.1029/2021jd034906
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发表时间：
2021-10-27
影响因子：
4.4
通讯作者：
Riedi, Jerome
中科院分区：
文献类型：
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作者：
Ceamanos, Xavier;Six, Bruno;Riedi, Jerome
地球静止气象卫星最近受到气溶胶遥感界的极大关注，因为它们的性能越来越先进，包括能够每天获取地球的多个视图。然而，这类观测系统由于只能部分覆盖地球仪而受到限制，因此不适合监测远距离传输的粒子或将由此产生的气溶胶产品纳入全球大气模型。由于同时使用了地球静止卫星GOES-17、GOES-16、Meteosat-11、Meteosat-8和Himawari-8，这一开创性的调查克服了这一缺点。这五个航天器的组合（在此称为地球静止轨道环）覆盖了除极区以外的整个地球仪，因为从地球静止轨道看不到极区。GEO-ring在2020年获得的数据由算法AERUS-GEO处理，以提供每日气溶胶光学厚度（AOD）的准全球地图。这些数据被证明是准确的AERONET地面测量。然后证明了气溶胶科学的GEO-ring的潜力。首先，检索的AOD图被证明是潜在的有用的全球气溶胶预报由于地球静止轨道环的地球覆盖率提高极轨道卫星Terra/Aqua（51.4%对26.6%）。其次，检索气溶胶数据用于跟踪2020年美国西部野火期间排放的远程传输气溶胶。这篇文章是气溶胶遥感的前奏，当气象卫星第三代成像仪发射后，专门由下一代成像仪组成的地球静止轨道环将成为可能。
Geostationary meteorological satellites are recently receiving a great deal of attention from the aerosol remote sensing community due to their increasingly advanced performances including their ability to acquire multiple views of the Earth per day. However, this type of observing systems are limited by their partial coverage of the globe, which makes them inappropriate for monitoring long-range-transported particles or assimilating the derived aerosol products into global atmospheric models. This shortcoming is overcome in this pioneering investigation thanks to the simultaneous use of the geostationary satellites GOES-17, GOES-16, Meteosat-11, Meteosat-8, and Himawari-8. The combination of these five spacecrafts (herein referred to as GEO-ring) covers the full globe except for polar regions, which are not seen from geostationary orbit. Data acquired by the GEO-ring in 2020 are processed by the algorithm AERUS-GEO to provide quasi-global maps of daily aerosol optical depth (AOD). These data are proved to be accurate with respect to AERONET ground measurements. The potential of the GEO-ring for aerosol science is then demonstrated. First, retrieved AOD maps are proved to be potentially useful for global aerosol forecasting due to the improved Earth coverage of the GEO-ring with respect to the polar orbiting satellites Terra/Aqua (51.4% vs. 26.6%). Second, retrieved aerosol data are used to track long-range-transported aerosols emitted during the 2020 Western US wildfires. This article is a prelude to the aerosol remote sensing that will be possible when a GEO-ring exclusively consisting of next generation imagers will be available with the launch of Meteosat Third Generation-Imager.