基于DOAS地空观测的典型热带地区臭氧敏感性研究  

Study on ozone sensitivity in typical tropical region from DOAS ground-to-space measurements

作　　者：刘蕊[1,2] 冯涛 郭艳林[5] 王颢樾 明蕊 王珊珊 周斌 LIU Rui;FENG Tao;GUO Yanlin;WANG Haoyue;MING Rui;WANG Shanshan;ZHOU Bin(School of Earth Sciences,Yunnan University,Kunming 650504;Key Laboratory of Atmospheric Environment and Processes in the Boundary Layer over the Low-Latitude Plateau Region,Kunming 650504;School of Information Science,Yunnan University of Finance and Economics,Kunming 650000;Chongming Ecological Research Institute,Shanghai 202151;Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention(LAP),Department of Environmental Science&Engineering,Fudan University,Shanghai 200438)

机构地区：[1]云南大学地球科学学院,昆明650504 [2]云南省高校低纬高原大气环境与边界层过程重点实验室,昆明650504 [3]云南财经大学信息学院,昆明650000 [4]崇明生态研究院,上海202151 [5]复旦大学环境科学与工程系,上海市大气颗粒物污染防治重点实验室,上海200438

出　　处：《环境科学学报》2021年第6期2262-2271,共10页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金(No.41365010,41807308,42061038);上海市大气颗粒物污染防治重点实验室开放课题(No.FDLAP20003);云南省科技厅-云南大学联合基金(No.2018FY001017,2019FY003017)。

摘　　要：利用主动LP-DOAS和被动Zenith-sky DOAS两种地基观测系统,对我国典型热带地区西双版纳的甲醛(HCHO)、二氧化氮(NO_(2))和臭氧(O_(3))进行了立体观测,并基于HCHO/NO_(2)比值法对该地区的臭氧敏感性进行了研究.结果表明,地面主动LP-DOAS观测的353个HCHO/NO_(2)小时均值结果中,有118个样本值<1,占比为33.4%,89个样本值在1~2之间,占25.2%,有146个样本值>2,占总数的41.4%,说明该地区的O_(3)浓度主要受NO_x的影响,且主要集中在上午10:00—晚上8:00.使用Zenith-sky DOAS观测的HCHO/NO_(2)垂直柱浓度数据验证了OMI/NASA的HCHO/NO_(2)比值数据在该地区的准确性,48个有效样本的相关系数为0.72,且变化趋势一致.在此基础上,利用OMI/NASA 2006—2016年的HCHO/NO_(2)比值数据研究了西双版纳臭氧敏感性的时空变化特征,结果表明,无论是季节变化还是年际变化该地区始终处于NO_x控制区,且比值高值区集中在勐海和勐腊县.最后对地空观测结果的差异性和不确定性进行了讨论.The three-dimensional distributions of formaldehyde(HCHO),nitrogen dioxide(NO_(2))and ozone(O_(3))in Xishuangbanna,a typical tropical region of China,are observed using the passive Zenith-sky DOAS and active long-pathlength DOAS(LP-DOAS).The ozone sensitivity to VOCs and NOx in Xishuangbanna is investigated using the HCHO/NO_(2) ratios.Among 353 HCHO/NO_(2) hourly mean ratios observed by the active LP-DOAS,118 HCHO/NO_(2) ratios are less than 1,accounting for 33.4%of the total sample;89 HCHO/NO_(2) ratios are between 1 and 2,accounting for 25.2%;146 HCHO/NO_(2) ratios are more than 2,accounting for 41.4%.This indicates that the O_(3) concentration in Xishuangbanna is primarily affected by NOx and the affection mainly takes place daily between 10 am and 8 pm.The column HCHO/NO_(2) ratios observed by the passive Zenith-sky DOAS validate the HCHO/NO_(2) ratios from OMI/NASA in Xishuagnbanna.The correlation coefficients of 48 valid samples is 0.72.These samples share very similar variations.The temporal and spatial variations of ozone sensitivity in Xishuangbanna during 2006—2016,revealed by the HCHO/NO_(2) ratios from OMI/NASA,show that the ozone in Xishuangbanna are only NOx-affected in all four seasons and all the years during 2006—2016,and high ratios are concentrated in Menghai and Mengla County.The differences and uncertainties of different ground and air observations are also discussed.

关 键 词：差分吸收光谱技术(DOAS) 臭氧敏感性 甲醛(HCHO) 二氧化氮(NO_(2)) OMI 西双版纳 

分 类 号：X831[环境科学与工程—环境工程] X51