Ozone sensitivity and precursor emission reduction scheme in Baoding City in summer
ZHANG Xin-yu, WANG Xiao-qi, WANG Chuan-da, ZHANG Jun-feng
Key Laboratory of Beijing on Regional Air Pollution Control, Department of Environment and Life Sciences, Beijing University of Technology, Beijing 100124, China
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 NOxand 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 NOx: VOCs should be larger than 1.
张新宇, 王晓琦, 王传达, 张俊峰. 保定市夏季臭氧生成敏感性及前体物减排方案[J]. 中国环境科学, 2023, 43(6): 2703-2713.
ZHANG Xin-yu, WANG Xiao-qi, WANG Chuan-da, ZHANG Jun-feng. Ozone sensitivity and precursor emission reduction scheme in Baoding City in summer. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(6): 2703-2713.
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