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首页> 外文会议>Conference on Ocean Remote Sensing and Imaging II; Aug 5-6, 2003; San Diego, California, USA >Optical properties of Asian dust aerosol by SeaWiFS and contemporaneous ground observation data
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Optical properties of Asian dust aerosol by SeaWiFS and contemporaneous ground observation data

机译：SeaWiFS和同期地面观测数据对亚洲粉尘气溶胶的光学性质

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摘要

Asian dust aerosol layer of 4-6 km altitude accompanied by low clouds was observed with a LIDAR in Tokyo urban area on April 10 2001. In addition, column-integrated size distribution of aerosol was measured with a SkyRadiometer. To synthesize the top of atmosphere (TOA) reflectance, radiative transfer simulation was conducted assuming aerosol/cloud vertical structure and aerosol size distribution that were estimated after the ground observations. The refractive index of Asian dust was derived from a laboratory measurement of sampled Chinese soil particles. The synthesized TOA reflectance was compared to the SeaWiFS-derived one sampled at the low cloud pixels whose airmass is the same as the one passed at the observation site. TOA reflectance of the one of Asian dust models compare generally well with few percent difference in reflectance. We estimated an affect of Asian dust aerosol to ocean color remote sensing. Simulated TOA radiance absorbed by Asian dust was 20.0 W/m~2/μm/sr in 443 nm. It is suggest that the existence of Asian dust occurs to derive negative water-leaving radiance.
机译：2001年4月10日在东京市区的LIDAR观测到4-6 km高度的亚洲粉尘气溶胶层，并伴有低云。此外，使用SkyRadiometer测量了气柱的整体粒径分布。为了合成大气层顶部（TOA）的反射率，假设在地面观测后估算了气溶胶/云垂直结构和气溶胶尺寸分布，进行了辐射传输模拟。亚洲尘埃的折射率来自对中国土壤样本采样的实验室测量。将合成的TOA反射率与从SeaWiFS得出的在低云像素处采样的反射率进行比较，该低云像素的空气质量与在观察点通过的相同。亚洲粉尘模型之一的TOA反射率通常可以很好地与反射率差异相差不大。我们估计了亚洲粉尘气溶胶对海洋颜色遥感的影响。亚洲尘埃吸收的模拟TOA辐射在443 nm处为20.0 W / m〜2 /μm/ sr。这表明亚洲尘埃的存在是为了产生负的水分辐射。

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