8 May 2003 Influence of absorbing aerosols on SeaWiFS-derived marine reflectance during ACE-Asia
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SeaWiFS observation of the East-Asian seas during the Aerosol Characterization Experiment-Asia shows large areas of under-estimated or even negative water-leaving radiance in the blue. To investigate it, three match-up stations were analyzed. 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 field measurements when the effect of sub-micron absorbing particles was considered in the simulation. The error in the retrieved water reflectance was much decreased, with average values of about 6% at 412nm and 443nm for the three stations. The effect of the Asian dust was also simulated in comparison with that of small absorptive aerosols. The under-estimation could not be solely attributed to Asian dust. It was also found that at one of the station, 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. Sub-micron absorbing particles, in addition of the Asian dust, should be considered in the optical remote sensing of East-Asian waters.
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Li-Ping Li, Li-Ping Li, Hajime Fukushima, Hajime Fukushima, Robert J. Frouin, Robert J. Frouin, B. Greg Mitchell, B. Greg Mitchell, Ming-Xia He, Ming-Xia He, Tamio Takamura, Tamio Takamura, Sachio Ohta, Sachio Ohta, } "Influence of absorbing aerosols on SeaWiFS-derived marine reflectance during ACE-Asia", Proc. SPIE 4892, Ocean Remote Sensing and Applications, (8 May 2003); doi: 10.1117/12.467264; https://doi.org/10.1117/12.467264

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