川南城市群大气灰霾时空分布特征及成因分析

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Abstract This study checked the quality of MODIS 3km AOD daily data using the local CE318 data in southern Sichuan. After ensuring the availability of MODIS AOD product, the relationship model of MODIS AOD and PM_2.5/10 was set up. And the temporal-spatial characteristics of atmospheric haze in the city group of Southern Sichuan were analyzed. The correlation coefficient between CE318AOD data and MODIS AOD product was 0.779, and the optimal correlation coefficient between PM_2.5, PM₁₀ and MODIS AOD was 0.894, 0.83 respectively. Spatially, the value of average AOD in the northern region was higher than the southern region of southern Sichuan, and the cities with highest AOD were Neijiang and Zigong. Temporally, the averaged AOD had no significant change from 2006 to 2013, but decreased obviously after 2013. Also the averaged AOD was higher in spring and winter, but lower in summer and autumn, and the largest proportion of high value was in spring. The monthly variation features showed that the AOD value was high from February to April and September and low in other months. The temporal and spatial distribution of AOD in Southern Sichuan were affected by terrain, industrial, wind speed and direction, flow field, PBL and other factors, among which, the terrain and flow field were the most prominent factors.

Key words： MODIS aerosol haze the spatial-temporal distribution the southern city-group of Sichuan

Received: 19 June 2016

PACS:

X513

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	Articles by authors
	HE Mu-quan
	LIU Zhi-hong
	ZHANG Ying
	ZHANG Yang
	YAN Yan
	HUANG Guan
	ZHANG Juan
	CHEN Jun-hui
	HE Min
	FAN Wu-bo

Cite this article:

HE Mu-quan,LIU Zhi-hong,ZHANG Ying等. Analyses on the spatial-temporal distribution features and causing factors of atmospheric haze in the southern city-group of Sichuan[J]. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(2): 432-442.

URL:

http://manu36.magtech.com.cn/Jweb_zghjkx/EN/ OR http://manu36.magtech.com.cn/Jweb_zghjkx/EN/Y2017/V37/I2/432

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