Spatio-Temporal Variations of Aerosol Optical Depth over Areas Around Beijing in Recent 14 Years

Abstract:

Based on the monthly data of MODIS Level 3, the spatio-temporal variabilities of Aerosol Optical Depth (AOD) over areas around Beijing have been analyzed from March 2000 to December 2013. The results presented that: (1) In the past 14 years , the annual mean AODs vary between 0.428 and 0.550; The recent 14 years can be divided into two stages, the first stage is 2000-2007, which shows an increasing trend with an increase rate of 1.349%, while the second stage is 2008-2013, which shows an decreasing trend with a decrease rate of 1.483%; Summer has the maximum AOD, but shows a decreasing trend, while winter has the minimum AOD, but shows an increasing trend. (2) AODs over the south are higher than the north, high AODs are mainly distributed along the southwest of Hebei and southwest of Shandong with an AOD of 0.72, while low AODs are mainly distributed along the north of Hebei and the north of Shanxi with an AOD of 0.23; The spatial distribution of AOD varies with the seasons, AODs are high in spring, and are maximized in summer, then show a significant decrease from summer to autumn, while are minimized in winter.

• Periodical: Advanced Materials Research (Volume 997)
• Pages: 843-846
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.997.843
• Online since: August 2014
• Authors: Hao Liu*, Xin Ming Tang, Wei Cao, Zhi Ying Xie, Jing Han Lei, Ming Li, Yang Gao
• Keywords: Aerosol Optical Depth, Areas around Beijing, MODIS, Spatio-Temporal Variation

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