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Assessment of the Aerosol Products From the SeaWiFS and MODIS Ocean-Color Missions

机译:评估SeaWiFS和MODIS海洋色彩任务的气溶胶产品

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The aerosol products derived from the ocean-color missions Sea-viewing Wide Field-of-View Sensor (SeaWiFS) and Moderate-Resolution Spectroradiometer (MODIS) Aqua and Terra are compared with field measurements from globally distributed Aerosol Robotic Network (AERONET) sites. Validation statistics are found consistent for the three missions. The median absolute relative difference between SeaWiFS and AERONET aerosol optical thickness $tau_{a}$ is approximately 20% at all bands while it is slightly higher for both MODIS products (between 20% and 28%). This is associated with a larger relative bias (median of relative differences between satellite and AERONET $tau_{a}$) on the order of $+$15% for these missions. With respect to previous processing versions, a noticeable improvement is seen in the representation of the spectral dependence of $tau_{a}$. The bias found for the Ångström exponent varies from $-$0.08 to $+$ 0.13 for the three missions.
机译:将海洋任务“海洋宽视野传感器(SeaWiFS)”和“中分辨率光谱辐射仪(MODIS)Aqua和Terra”派生的气溶胶产品与全球分布的气溶胶机器人网络(AERONET)站点的现场测量结果进行了比较。确认统计数据与这三个任务一致。在所有频段上,SeaWiFS和AERONET气溶胶光学厚度之间的中值绝对相对差 $ tau_ {a} $ 大约为20%两种MODIS产品的价格都略高一些(介于20%和28%之间)。这与较大的相对偏差(卫星和AERONET之间的相对差异中位数 $ tau_ {a} $ )有关。这些任务的 $ + $ 的顺序为15%。与以前的处理版本相比,在 $ tau_ {a} $ 的光谱依赖性表示中,可以看到明显的改进。 。发现Ångström指数的偏差从 $-$ 0.08到 $ + $ 公式为0.13。

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