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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >PASSIVE REMOTE SENSING OF TROPOSPHERIC AEROSOL AND ATMOSPHERIC CORRECTION FOR THE AEROSOL EFFECT
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PASSIVE REMOTE SENSING OF TROPOSPHERIC AEROSOL AND ATMOSPHERIC CORRECTION FOR THE AEROSOL EFFECT

机译：对流气溶胶的被动遥感及气溶胶效应的大气校正。

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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. [References: 67]
机译：搭载POLDER，TOMS和OCTS仪器的ADEOS于1996年8月发射，以及搭载MODIS和MISR仪器的1998年中期EOS-AM 1的未来发射，开启了气溶胶遥感新时代，这是卫星探测的一部分。整个地球系统的全新遥感技术（请参见本文“注释”部分中的首字母缩略词列表）。这些平台将紧随其他具有独特气溶胶感测功能的国际平台，甚至在本世纪仍在使用（例如1999年的ENVISAT）。这些国际空间星空多光谱，多角度和极化测量值首次与国际上对地面气溶胶的常规自动监测相结合，有望在我们观察高度变化的全球气溶胶方面实现巨大的飞跃。这项新功能与目前针对AVHRR，Meteosat和GOES的单通道技术形成了鲜明对比，后者虽然标定不佳且特性不佳，但已经产生了重要的气溶胶全球图和区域运输评估。新的数据将大大改善大气校正对海洋遥感上的气溶胶影响，并将用于在陆地上生成第一个实时大气校正。本期特刊概述了遥感技术变化背后的科学，以及对现有卫星和飞机仪器数据的新算法的敏感性研究和应用。本介绍性文章提供了背景信息和在专门讨论此主题的研讨会中进行的重要讨论的摘要。在讨论中得出的结论是，预期从具有不同观测策略的多个空间平台同时进行的气溶胶遥感预期以及全球范围内的连续验证，对于测试遥感方法以表征复杂和高度可变的特性至关重要。气溶胶领域。到目前为止，由于缺乏足够的理论分析和对适当的现场数据的应用，我们对卫星信息中的气溶胶信息的辐射转移反演的信息内容和准确性只有部分了解。这种限制将使预期的新数据更加有趣和具有挑战性。一个主要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关键参数。在海洋上，主要关注的问题是白帽和灰尘对校正方案的影响。气溶胶回收和大气校正的未来改进将需要更好的气溶胶气候学，以及对混合成分和颗粒形状的影响的了解。计划的气溶胶遥感中缺少的主要成分是气溶胶剖面的星载和地面激光雷达观测。 [参考：67]

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