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  

Vertical profiles characteristics of near surface layer ozone in Shangyu Economic Development Zone of Hangzhou Bay based on unmanned aerial vehicle

作　　者：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 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(College of Environment,Zhejiang University of Technology,Hangzhou 310014,China;Zhejiang Aikele Environment Protection Co.,Ltd.,Hangzhou 310030,China;Shaoxing Ecological Environment Monitoring Center of Zhejiang Province,Shaoxing 312099,China)

机构地区：[1]浙江工业大学环境学院,浙江杭州310014 [2]浙江爱科乐环保有限公司,浙江杭州310030 [3]浙江省绍兴生态环境监测中心,浙江绍兴312099

出　　处：《中国环境科学》2022年第6期2514-2522,共9页China Environmental Science

基　　金：浙江领雁研发攻关计划项目(2022C03073);浙江省重点研发计划(2021C03165);浙江省自然科学基金(LZ20D050002);绍兴市科技计划项目(2020B3303)。

摘　　要：为了解化工园区大气污染情况,使用自主研制的微型大气检测仪结合无人机研究化工园区臭氧(O_(3))垂直廓线,在2020年8月~2021年1月于杭州湾上虞经济技术开发区开展了12d无人机外场观测实验.各观测日从08:00~18:00每隔1h进行一次飞行观测,每次观测分别获得了离地面0,50,100,200,300,400,500m的O_(3)、总挥发性有机物(TVOCs)和二氧化氮(NO_(2))浓度.结果表明:受气象因素、地面工厂排放以及早晚出行高峰的影响,TVOCs和NO_(2)浓度整体随高度增加而下降,其中NO_(2)浓度随高度上升而下降的幅度较明显,在0m处浓度为19.7~59.1μg/m^(3),500m处为5.9~21.7μg/m^(3),下降率为40~70%,TVOCs和NO_(2)浓度都呈现出早晚高、正午低的日变化趋势,此外可能受逆温层的影响导致个别天数NO_(2)浓度在400~500m不降反升;O_(3)受前体物光化学反应、太阳辐射强度及平流层输送的影响,其浓度随高度增加而下降,平均浓度在0m处为49.2μg/m^(3),500m处为98.4μg/m^(3),O_(3)日变化浓度在15:00~17:00达到峰值.TVOCs和O_(3)、NO_(2)和O_(3)在各高度浓度均呈负相关,受不同季节气象因素差异和冬季取暖排放增加的影响,O_(3)浓度季节变化为夏>秋>冬,TVOCs和NO_(2)浓度为冬季>秋季>夏季.后向轨迹聚类分析表明化工园区本地O_(3)浓度会受区域输送影响升高,在冬季时由于气温低不利于前体物生成O_(3),本地O_(3)浓度受区域输送影响较夏季小.In order to understand the air pollution in chemical parks,the vertical profiles of ozone(O_(3))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 O_(3),TVOCs and NO_(2) 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 NO_(2) usually decreased with increasing height due to meteorological factors,ground-level plant emissions and peak travel,and the concentrations of NO_(2) decreased more significantly with increasing height,ranged from 19.7~59.1μg/m^(3) at 0m to 5.9~21.7μg/m^(3) at 500m,with a decreased rate of 40%~70%.The concentrations of TVOCs and NO_(2) showed a daily trend of high in the morning and evening,low in the noon.In addition,the concentrations of NO_(2) increased at 400~500m in some days caused by inversion layer.The concentrations of O_(3) increased with height affected by the photochemical reaction of precursors,solar radiation intensity and stratospheric input,the average concentrations were 49.2μg/m^(3) at 0m and 98.4μg/m^(3) at 500m,and the peak value of daily variations reached at 15:00~17:00.TVOCs and O_(3),NO_(2) and O_(3) were negatively correlated at all heights.The seasonal change of O_(3) concentrations were summer>autumn>winter,and the concentrations of TVOCs and NO_(2) 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 O_(3) concentrations in chemical industry park would be affected by regional transport,and the local O_(3) concentrations in winter was less influenced by the regional transport than in summer because the low

关 键 词：臭氧 无人机 垂直廓线 化工园区 后向轨迹 

分 类 号：X515[环境科学与工程—环境工程]