研究论文
刘蕊,冯涛,郭艳林,王颢樾,明蕊,王珊珊,周斌.基于DOAS地空观测的典型热带地区臭氧敏感性研究[J].环境科学学报,2021,41(6):2262-2271
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
- 基金项目：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）
- 作者
- 单位
- 刘蕊
- 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
- 冯涛
- 云南财经大学信息学院, 昆明 650000
- 郭艳林
- 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
- 王颢樾
- 云南大学地球科学学院, 昆明 650504
- 明蕊
- 云南大学地球科学学院, 昆明 650504
- 王珊珊
- 1. 崇明生态研究院, 上海 202151;2. 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
- 周斌
- 1. 崇明生态研究院, 上海 202151;2. 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
- 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（NO2）和臭氧（O3）进行了立体观测，并基于HCHO/NO2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/NO2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O3浓度主要受NOx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/NO2垂直柱浓度数据验证了OMI/NASA的HCHO/NO2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/NO2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NOx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.
- Abstract：The three-dimensional distributions of formaldehyde (HCHO), nitrogen dioxide (NO2) and ozone (O3) 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/NO2 ratios. Among 353 HCHO/NO2 hourly mean ratios observed by the active LP-DOAS, 118 HCHO/NO2 ratios are less than 1, accounting for 33.4% of the total sample; 89 HCHO/NO2 ratios are between 1 and 2, accounting for 25.2%; 146 HCHO/NO2 ratios are more than 2, accounting for 41.4%. This indicates that the O3 concentration in Xishuangbanna is primarily affected by NOx and the affection mainly takes place daily between 10am and 8pm. The column HCHO/NO2 ratios observed by the passive Zenith-sky DOAS validate the HCHO/NO2 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/NO2 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.
- Key words：differential optical absorption spectroscopy (DOAS) ozone sensitivity formaldehyde (HCHO) nitrogen dioxide (NO2) OMI Xishuangbanna
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