Passive remote sensing of tropospheric aerosol and atmospheric correction for the aerosol effect
Passive remote sensing of tropospheric aerosol and atmospheric correction for the aerosol effect
复制标题
DOI：
10.1029/97jd01496
复制
发表时间：
1997-07-27
影响因子：
4.4
通讯作者：
Teillet, PM
中科院分区：
文献类型：
--
作者：
Kaufman, YJ;Tanre, D;Teillet, PM
1996年8月搭载POLDER、TOMS和OCTS仪器的高级地球观测卫星的发射，以及1998年年中搭载中分辨率成像光谱仪和MISR仪器的EOS-AM 1的未来发射，开启了作为整个地球系统新的遥感一部分的气溶胶遥感的新时代（见本文注释部分的缩略语清单）。继这些平台之后，将有其他具有独特气溶胶传感能力的国际平台，其中一些仍处于本世纪（例如，环境卫星，1999年）。这些国际空间多光谱、多角度和偏振测量首次与国际自动、常规地面气溶胶监测相结合，预计将在我们观测高度可变的全球气溶胶的能力方面实现巨大飞跃。这一新的能力与目前的单通道技术的高级甚高分辨率辐射计，气象卫星，和GOES，虽然校准不良，性质不佳，已经产生了重要的气溶胶全球地图和区域运输评估。这些新数据将大大改进气溶胶对海洋遥感影响的大气校正，并将用于生成第一批陆地上空的实时大气校正。这期特刊总结了遥感变化背后的科学，以及新算法对当前卫星和飞机仪器数据的敏感性研究和应用。本介绍性文件提供了背景资料，并概述了专门讨论这一专题的讲习班上进行的重要讨论。讨论中得出的结论是，预期从具有不同观测战略的几个空间平台同时进行气溶胶遥感，加上在世界各地不断进行验证，预计将对测试遥感方法以确定复杂多变的气溶胶场的特征具有重大意义。目前，由于缺乏足够的理论分析和实际应用，我们对卫星气溶胶辐射传输反演的信息量和精度只有部分认识。这一限制将使预期的新数据更加有趣和具有挑战性。一个主要的问题是目前从空间或地面感知气溶胶吸收的能力不足。吸收是气候研究和大气校正的一个关键参数。在海洋上，主要关注的是白色帽和尘埃对校正方案的影响。未来气溶胶反演和大气校正的改进将需要更好的气溶胶特性的气候学和对颗粒混合成分和形状的影响的理解。计划中的气溶胶遥感缺少的主要内容是对气溶胶剖面的空间和地面激光雷达观测。
The launch of ADEOS in August 1996 with POLDER, TOMS, and OCTS instruments on board and the future launch of EOS-AM 1 in mid-1998 with MODIS and MISR instruments on board start a new era in remote sensing of aerosol as part of a new remote sensing of the whole Earth system (see a list of the acronyms in the Notation section of the paper). These platforms will be followed by other international platforms with unique aerosol sensing capability, some still in this century (e.g., ENVISAT in 1999). These international spaceborne multispectral, multiangular, and polarization measurements, combined for the first time with international automatic, routine monitoring of aerosol from the ground, are expected to form a quantum leap in our ability to observe the highly variable global aerosol. This new capability is contrasted with present single-channel techniques for AVHRR, Meteosat, and GOES that although poorly calibrated and poorly characterized already generated important aerosol global maps and regional transport assessments. The new data will improve significantly atmospheric corrections for the aerosol effect on remote sensing of the oceans and be used to generate first real-time atmospheric corrections over the land. This special issue summarizes the science behind this change in remote sensing, and the sensitivity studies and applications of the new algorithms to data from present satellite and aircraft instruments. Background information and a summary of a critical discussion that took place in a workshop devoted to this topic is given in this introductory paper. In the discussion it was concluded that the anticipated remote sensing of aerosol simultaneously from several space platforms with different observation strategies, together with continuous validations around the world, is expected to be of significant importance to test remote sensing approaches to characterize the complex and highly variable aerosol field. So far, we have only partial understanding of the information content and accuracy of the radiative transfer inversion of aerosol information from the satellite data, due to lack of sufficient theoretical analysis and applications to proper field data. This limitation will make the anticipated new data even more interesting and challenging. A main concern is the present inadequate ability to sense aerosol absorption, from space or from the ground. Absorption is a critical parameter for climate studies and atmospheric corrections. Over oceans, main concerns are the effects of white caps and dust on the correction scheme. Future improvement in aerosol retrieval and atmospheric corrections will require better climatology of the aerosol properties and understanding of the effects of mixed composition and shape of the particles. The main ingredient missing in the planned remote sensing of aerosol are spaceborne and ground-based lidar observations of the aerosol profiles.