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Infrared satellite-derived sea surface skin temperature sensitivity to aerosol vertical distribution ̶ Field data analysis and model simulations
Remote Sensing of Environment ( IF 13.5 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.rse.2020.112151
Bingkun Luo , Peter J. Minnett , Nicholas R. Nalli

Abstract Sea surface temperature is an Essential Climate Variable. The radiative impact of mineral dust is one of the major contributors to inaccuracies in the satellite-retrieved sea surface skin temperature (SSTskin). Different aerosol dust vertical distributions have varying effects on the satellite-derived SSTskin. To further investigate the physical mechanisms of aerosol effects on Terra MODerate-resolution Imaging Spectroradiometers (MODIS) derived SSTskin, the aerosol radiative effects were studied with a field-data match-up analysis and radiative transfer simulations. The field data are measurements of the SSTskin derived from highly accurate ship-based infrared spectrometers vertical atmospheric temperature and water vapor radiosonde profiles. The aerosol dust concentrations in three-dimensions from the NASA Modern-Era Retrospective analysis for Research and Applications, Version 2 have been used as input to radiative transfer simulations. Based on the analysis of field data and simulations, we have empirically determined that the sensitivity of the Terra MODIS retrieved SSTskin accuracies is related to 1) dust concentration in the atmosphere, 2) the dust layer altitude, and 3) the dust layer temperature. As the aerosol altitude increases, the effect on the SSTskin retrievals becomes more negative in proportion to the temperature contrast with the sea surface. SSTskin differences, satellite-derived - surface measurements, for a given aerosol layer optical depth vary between −3 K and 1 K according to our match-up comparisons and radiative transfer simulations.

中文翻译:

红外卫星衍生的海面皮肤温度对气溶胶垂直分布的敏感性 ̶ 现场数据分析和模型模拟

摘要 海面温度是一个重要的气候变量。矿物尘埃的辐射影响是导致卫星获取的海面表皮温度 (SSTskin) 不准确的主要原因之一。不同的气溶胶尘埃垂直分布对卫星衍生的 SSTskin 有不同的影响。为了进一步研究气溶胶效应对 Terra 中分辨率成像光谱仪 (MODIS) 衍生的 SSTskin 的物理机制,通过现场数据匹配分析和辐射传输模拟研究了气溶胶辐射效应。现场数据是从高精度舰载红外光谱仪垂直大气温度和水汽无线电探空仪剖面得出的 SSTskin 测量值。美国宇航局现代时代研究和应用回顾分析第 2 版中的三维气溶胶粉尘浓度已被用作辐射传输模拟的输入。基于对现场数据和模拟的分析,我们根据经验确定,Terra MODIS 反演 SSTskin 精度的灵敏度与 1) 大气中的尘埃浓度、2) 尘埃层高度和 3) 尘埃层温度有关。随着气溶胶高度的增加,与海面温度对比成比例地对 SSTskin 检索的影响变得更加负面。根据我们的匹配比较和辐射传输模拟,SSTskin 差异、卫星衍生的表面测量对于给定的气溶胶层光学深度在 -3 K 和 1 K 之间变化。
更新日期:2021-01-01
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