保定市夏季臭氧生成敏感性及前体物减排方案

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Abstract Based on the datasets of air pollutant concentrations and meteorological conditions of Baoding from 2015 to July 2019, the relationship between O₃ characteristics and meteorological factors in summer season was analyzed. The O₃ sensitivity and the reduction scheme of precursors (NOx and VOCs) emissions was determined combining WRF-CMAQ simulations and EKMA curve. Results indicated that monthly average concentrations of MDA8O₃ in July from 2015 to 2019 ranged from 138 to 179μg/m³. Compared with 2015, the average concentration of MDA8O₃ in July 2019 increased by 10.5%. Among the major meteorological factors, the ozone concentration was positively correlated with temperature (R=0.81 on nonattainment days) and negatively correlated with relative humidity (R=-0.70 on nonattainment days). And higher concentration of O₃ mainly occurred accompanied with west wind, southwest wind, south wind and southeast wind. Ozone formation was in the strong VOCs-limited regime in the main urban, southern and eastern suburban of Baoding city, however, it was in the NO_x and VOCs transition regime in the western and northern suburban. Thus, it was suggested that the reduction of VOCs emissions should be priority considered in VOCs-limited regime regions. As for the western and northern suburban, the reduction ratio of NO_x: VOCs should be larger than 1.

Key words： Baoding City ozone WRF-CMAQ sensitivity analysis emission reduction scheme

Received: 03 November 2022

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X511

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	Articles by authors
	ZHANG Xin-yu
	WANG Xiao-qi
	WANG Chuan-da
	ZHANG Jun-feng

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ZHANG Xin-yu,WANG Xiao-qi,WANG Chuan-da等. Ozone sensitivity and precursor emission reduction scheme in Baoding City in summer[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(6): 2703-2713.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I6/2703

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