Journal of Ecology and Rural Environment ›› 2018, Vol. 34 ›› Issue (1): 54-63.doi: 10.11934/j.issn.1673-4831.2018.01.007

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Study of Aerosol Direct Radiation Effects in the Yangtze River Delta Based on MODIS Data

ZHOU Jie1, CHEN Jian1, ZHANG Hai-long2, WANG Wen-jun1   

  1. 1. School of Geography & Remote Sensing, Nanjing University of Information Science & Technology, Nanjing 210044, China;
    2. School of Marine Science, Nanjing University of Information Science & Technology, Nanjing 210044, China
  • Received:2017-04-06 Online:2018-01-25 Published:2018-01-26

Abstract:

Based on relevant MODIS data and the 6S atmospheric radiation transfer model, aerosol direct radiation effects (ADRE) on the surface of the Yangtze River Delta and the top layer of the atmosphere were simulated and calculated, and then validated for accuracy with reference to the measured data by CE-318 of the Beichen Building Station of the Nanjing University of Information Science & Technology. On such a basis, analysis was conducted of spatio-temporal distribution of ADRE in the Yangtze River Delta region, Results show that the MODIS data could be used to inverse ADRE on land surface and on top of the atmosphere with results approximate to the measured data, reaching 0.92 and 0.95 in fitting accuracy (R2). In terms of spatial distribution and variation, ADREs on land surface (-31.60--20.54 W·m-2) and on top of the atmosphere (-3.48--2.61 W·m-2) tended to be similar with absolute values being high in the north and lower towards the south. The ADREs in Suzhou, Wuxi and Changzhou of South Jiangsu increased significantly; In terms of temporal variation, absolute ADREs fluctuated downwards year by year, varying in the range of -21.78--5.94 and -2.45--0.73 W·m-2, respectively, on land surface and on top of the atmosphere, and varied quite significantly with the season in Jiangsu and Shanghai and relatively less in Zhejiang in the range of -10-0 W·m-2 on land surface and -1-0 W·m-2 on top of the atmosphere.

Key words: aerosol, direct radiation effects, Yangtze River Delta, MODIS

CLC Number: