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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Influence of submicron absorptive aerosol on sea-viewing wide field-of-view sensor (SeaWiFS)-derived marine reflectance during Aerosol Characterization Experiment (ACE)-Asia - art. no. 4472
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Influence of submicron absorptive aerosol on sea-viewing wide field-of-view sensor (SeaWiFS)-derived marine reflectance during Aerosol Characterization Experiment (ACE)-Asia - art. no. 4472

机译：亚微米吸收性气溶胶对在气溶胶特征实验（ACE）-亚洲中的海景宽视野传感器（SeaWiFS）衍生的海洋反射率的影响-艺术。没有。 4472

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Sea-viewing Wide Field-of-view Sensor observation of the east Asian seas during the March-April 2001 Aerosol Characterization Experiment-Asia shows large areas of underestimated or even negative water-leaving radiance in the blue. To investigate the cause of the problem, three cloud-free matchup stations around Japan were analyzed, where in situ measurements were made onboard R/V Ronald H. Brown at the time of satellite overpass. Using an optimization method, information on the possible composition of aerosols was obtained from sky radiance data collected onboard the ship. An iterative radiative transfer simulation was carried out in an attempt to reproduce the satellite-measured top-of-atmosphere reflectance. The resulting water reflectance and aerosol optical thickness (AOT) agreed well with in situ measurements when the effect of submicron absorbing particles was considered in the radiative transfer simulation. The error in the retrieved water reflectance was much decreased, with average values of about 6% at 412 and 443 nm for the three stations. The effect of the Asian dust was also simulated in comparison with that of small absorptive aerosols. The underestimation could not be solely attributed to Asian dust. It was also found that at one of the stations, where the presence of dust aerosols was anticipated, an aerosol model mixed with both dust and soot improved the accuracy of the estimated AOT compared with the case of soot as the only absorptive aerosol (error of 13% at 865 nm instead of 44%). Submicron absorbing particles, in addition of the Asian dust, should be considered in the optical remote sensing of east Asian waters. [References: 29]
机译：海洋视野2001年3月至4月的亚洲气溶胶特征实验期间，传感器对东亚海域的观测显示出大片被低估甚至为负水辐射的蓝色区域。为了调查问题的原因，对日本周围的三个无云对位站进行了分析，并在卫星越过时在R / V Ronald H. Brown船上进行了现场测量。使用优化方法，从船上收集的天空辐射数据中获得了有关气溶胶可能成分的信息。进行了迭代辐射传递模拟，以尝试再现卫星测量的大气顶反射率。当在辐射转移模拟中考虑亚微米吸收颗粒的影响时，所得的水反射率和气溶胶光学厚度（AOT）与原位测量吻合得很好。取回的水反射率的误差大大降低，三个站的412和443 nm处的平均值约为6％。与小型吸收性气溶胶相比，还模拟了亚洲尘埃的影响。低估不能完全归因于亚洲的尘埃。还发现，在其中一个预计会出现粉尘气溶胶的站点中，与作为唯一吸收性气溶胶的烟尘情况相比，将粉尘和烟灰混合的气溶胶模型提高了估计的AOT的准确性。在865 nm处为13％，而不是44％）。在东亚水域的光学遥感中，除亚洲尘埃外，还应考虑吸收亚微米颗粒。 [参考：29]

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