Vertical profiles characteristics of near surface layer ozone in Shangyu Economic Development Zone of Hangzhou Bay based on unmanned aerial vehicle
DAI Shang1, ZHOU Cheng-xiang2, PANG Xiao-bing1, LI Jing-jing3, CHEN Lang1, WU Zhen-tao1, YUAN Kai-bin1, HAN Zhang-liang1, WANG Qiang1, WANG Shuai-qi1, CHEN Jian-meng1
1. College of Environment, Zhejiang University of Technology, Hangzhou 310014, China; 2. Zhejiang Aikele Environment Protection Co., Ltd., Hangzhou 310030, China; 3. Shaoxing Ecological Environment Monitoring Center of Zhejiang Province, Shaoxing 312099, China
Abstract：In order to understand the air pollution in chemical parks, the vertical profiles of ozone (O3) in chemical park were studied bya self-developed miniature atmospheric detector combined withan unmanned aerial vehicle(UAV), a 12-day UAV field observations was carried out in Shangyu Economic Development Zone of Hangzhou Bay during August 2020 to January 2021. Flight observations were conducted every 1h from 08:00 to 18:00 on each observation day, the concentrations of O3, TVOCs and NO2 were obtained at 0, 50, 100, 200, 300, 400 and 500m above the ground for each observation. The results showed that the concentrations of TVOCs and NO2 usually decreased with increasing height due to meteorological factors, ground-level plant emissions and peak travel, and the concentrations of NO2 decreased more significantly with increasing height, ranged from 19.7~59.1μg/m3 at 0m to 5.9~21.7μg/m3 at 500m, with a decreased rate of 40%~70%.The concentrations of TVOCs and NO2 showed a daily trend of high in the morning and evening, low in the noon. In addition, the concentrations of NO2 increased at 400~500m in some days caused by inversion layer. The concentrations of O3 increased with height affected by the photochemical reaction of precursors, solar radiation intensity and stratospheric input, the average concentrations were 49.2μg/m3 at 0m and 98.4μg/m3 at 500m, and the peak value of daily variations reached at 15:00~17:00. TVOCs and O3, NO2 and O3 were negatively correlated at all heights. The seasonal change of O3 concentrations were summer>autumn>winter, and the concentrations of TVOCs and NO2 were winter>autumn>summer, affected by the difference of meteorological factors in different seasons and the increase of heating emissions in winter. Backward trajectory cluster analysis showed that the local O3 concentrations in chemical industry park would be affected by regional transport, and the local O3 concentrations in winter was less influenced by the regional transport than in summer because the low temperature was not conducive to the generation of O3 from precursors.
戴上, 周呈祥, 庞小兵, 李晶晶, 陈浪, 吴振涛, 袁锴彬, 韩张亮, 王强, 王帅奇, 陈建孟. 基于无人机观测研究杭州湾化工园区近地面层臭氧垂直廓线[J]. 中国环境科学, 2022, 42(6): 2514-2522.
DAI Shang, ZHOU Cheng-xiang, PANG Xiao-bing, LI Jing-jing, CHEN Lang, WU Zhen-tao, YUAN Kai-bin, HAN Zhang-liang, WANG Qiang, WANG Shuai-qi, CHEN Jian-meng. Vertical profiles characteristics of near surface layer ozone in Shangyu Economic Development Zone of Hangzhou Bay based on unmanned aerial vehicle. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(6): 2514-2522.
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