京津冀地区气溶胶光学厚度反演及其空间分布特征

doi:10.3969/j.issn.1673-503X.2017.03.007

Abstract

Abstract: Based on Terra/MODIS MOD021KM data from September 1,2014 to May 31,2015,as well as deep blue algorithm and look-up-table methods,aerosol optical depths (AOD) over Jing-Jin-Ji region were retrieved with the spatial resolution of 1 km,the results were compared with NASA products and CE-318 measurements.The results show that the retrieved AODs have higher spatial resolution and relatively good agreements with the products of MOD 04_L2 (10 km×10 km) and MOD 04_3K (3 km×3 km) .The mean absolute error between retrieved AODs and those observed by CE-318 sun-photometer at Shijiazhuang site is about 0.07,with a high correlation coefficient of 0.98.When Terra passed the territory,mean errors of retrieved AOD compared with MOD 04_L2 and MOD 04_3K products were around 0.06 and 0.03,respectively.Further relationship analysis on the spatial contributions of retrieved AODs and the mass concentrations of PM_2.5 and PM₁₀ over Hebei province indicated that the correlation coefficients between AOD and PM_2.5 and PM₁₀ are 0.745 and 0.663,respectively,suggesting that the retrieved AODs with the resolution of 1 km could effectively reflect the mass concentrations of PM_2.5 and PM₁₀.

Key words: MODIS, Aerosol optical depth, Deep blue algorithm, Look-up-table method

CLC Number:

X513

YANG Peng, CHEN Jing, GAO Qi, ZHI Li-hui, ZHAO Li-ping, CUI Sheng-cheng. Retrievals of aerosol optical depths and their spatial distributions over Jing-Jin-Ji region[J]. Journal of Meteorology and Environment, 2017, 33(3): 52-58.

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http://www.jme1984.net.cn/EN/Y2017/V33/I3/52

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Retrievals of aerosol optical depths and their spatial distributions over Jing-Jin-Ji region

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