2005~2018年河南省NO<sub>2</sub>柱浓度变化特征

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Abstract The temporal-spatial characteristics of NO₂ column concentration over Henan province in 2005~2018 were analyzed using OMI remote sensing data. The change characteristics of NO₂ column concentration after 2013 were analyzed according to the implementation time of the Action Plan of Air Pollution Prevention and Control. NO₂ column concentration over Henan province was high in northeast and low in southwest. The large values appeared over the area of Anyang-Xinxiang-Jiaozuo (>18.0×10¹⁵molec/cm²), while the low values appeared over the border of Luoyang, Sanmenxia and Nanyang cities. As to seasons, NO₂ column concentration in winter was significantly higher than that in spring and summer. The concentration of high value center in winter was 50%~70% higher than that in spring and summer. Before 2011, the concentration of NO₂ had an increasing trend over Henan province, and the concentration was growing faster over north. The concentration of NO₂ was decreasing over the whole province in 2011~2018, with the fastest deceleration over the area of Jiaozuo-Xinxiang-Anyang. The reduction of the total pollutants emission and implementation of the Action Plan of Air Pollution Prevention and Control promoted the reduction of concentrations effectively. Compared with the cities located in the Beijing-Tianjin-Hebei transmission channel of air pollution, the NO₂ column concentration of other cities decreased slowly or even increased after 2013. Therefore, the prevention and control of air pollution should be strengthened outside the transmission channel.

Key words： OMI NO₂ column concentration Henan province temporal-spatial characteristics

Received: 09 March 2020

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	YAN Li
	HE Jin-yu
	YANG Xiao-yue
	WANG Yan-chao
	LEI Yu

Cite this article:

YAN Li,HE Jin-yu,YANG Xiao-yue等. Variation of NO₂ column concentration over Henan province in 2005~2018[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(10): 4259-4264.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I10/4259

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