Retrieval of aerosol optical properties over the Beijing area using POLDER/PARASOL satellite polarization measurements |
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| Authors: | Xuehua Fan Hongbin Chen Longfu Lin Zhigang Han Philippe Goloub |
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| Institution: | (1) NASA Goddard Space Flight Center, Code 428 Earth Science Mission Operations (ESMO) Project, Mission Validation and Operations Branch, Greenbelt, MD 20771, USA;(2) Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109-8099, USA;(3) SGT Inc, Greenbelt, MD 20770, USA;(4) CNES – DCT/ OP/M2, 31401 Toulouse, France |
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| Abstract: | Aerosol optical properties over Beijing and Xianghe under several typical weather conditions
(clear sky, light haze, heavy pollution and dust storm) are derived from POLDER (POLarization and
Directionality of the Earths Reflectances)/PARASOL (Polarization and Anisotropy of Reflectances for
Atmospheric Sciences coupled with Observations from a Lidar) multi-directional, multi-spectral polarized
signals using a more reliable retrieval algorithm as proposed in this paper. The results are compared with
those of the operational retrieval algorithm of POLDER/PARASOL group and the ground-based AERONET (AErosol
RObotic NETwork)/PHOTONS (PHOtometrie pour le Traitement Operational de Normalisation Satellitaire)
measurements. It is shown that the aerosol optical parameters derived from the improved algorithm agree well
with AERONET/PHOTONS measurement. The retrieval accuracies of aerosol optical thickness (AOT) and effective
radius are 0.06 and 0.05 mu m respectively, which are close to or better than the required accuracies (0.04
for AOT and 0.1 mu m for effective radius) for estimating aerosol direct forcing. |
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| Keywords: | POLDER/PARASOL polarized reflectance aerosol optical properties AERONET/PHOTONS |
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