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《大气和海洋科学快报(英文版)》 2014-06
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An Empirical Model for Estimating the Zonal Mean Aerosol Extinction Profiles from SAGE II Measurements

YANG Jing-Mei;ZONG Xue-Mei;Key Laboratory of Middle Atmosphere and Global Environment Observation,Institute of Atmospheric Physics,Chinese Academy of Sciences;  
This paper presents an empirical model for estimating the zonal mean aerosol extinction profiles in the stratosphere over 10°-wide latitude bands between 60°S and 60°N, on the basis of Stratospheric Aerosol and Gas Experiment(SAGE) II aerosol extinction measurements at 1.02, 0.525, and 0.452 μm during the volcanically quiescent period between 1998–2004. First, an empirical model is developed for calculating the stratospheric aerosol extinction profiles at 1.02 μm. Then, starting from the 1.02 μm extinction profile and an exponential spectral dependence, an empirical algorithm is developed that allows the aerosol extinction profiles at other wavelengths to be calculated. Comparisons of the model-calculated aerosol extinction profiles at the wavelengths of 1.02, 0.525, and 0.452 μm and the SAGE II measurements show that the model-calculated aerosol extinction coefficients conform well with the SAGE II values, with the relative differences generally being within 15% from 2 km above the tropopause to 40 km. The model-calculated stratospheric aerosol optical depths at the three wavelengths are also in good agreement with the corresponding optical depths derived from the SAGE II measurements, with the relative differences being within 0.9% for all latitude bands. This paper provides a useful tool in simulating zonal mean aerosol extinction profiles, which can be used as representative background stratospheric aerosols in view of atmospheric modeling and remote sensing retrievals.
【Fund】: supported by the National Natural Science Foundation of China (Grant No. 41275047);; the National Basic Research Program of China (Grant No. 2013CB955801);; the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDA05100300)
【CateGory Index】: P407;X513
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【Citations】
Chinese Journal Full-text Database 3 Hits
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Chinese Journal Full-text Database 10 Hits
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