Study of aerosol characteristics and sources using MAX-DOAS measurement during haze at an urban site in the Fenwei Plain
Study of aerosol characteristics and sources using MAX-DOAS measurement during haze at an urban site in the Fenwei Plain
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汾渭平原城区雾霾天气气溶胶特征及来源研究
DOI：
10.1016/j.jes.2020.12.015
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发表时间：
2021-09-01
影响因子：
6.9
通讯作者：
Li, Jie
中科院分区：
文献类型：
--
作者：
Li, Xiaomei;Xie, Pinhua;Li, Jie
大气气溶胶对大气辐射评估、全球气候变化、当地空气质量和能见度都有影响。特别是，气溶胶更容易在冬季转化和积聚。本文利用多轴差分光学吸收光谱（MAX-DOAS）仪器，研究了PM2.5化学成分对气溶胶消光（AE）、气溶胶垂直分布和来源的贡献。2018年12月30日至2019年1月27日，我们对三门峡进行了MAX-DOAS观测。PM2.5占PM10的比例为69.48% ~ 95.39%，说明气溶胶颗粒以细颗粒物为主。通过对离子数据的分析，并对保护视觉环境的机构间监测（Interagency Monitoring of Protected Visual Environments， IMPROVE）方法进行修正，我们发现硝酸盐是最大的AE贡献者，在重污染日、污染日和清洁日分别占AE的31.51%、28.98%和27.95%。NH4+、OC和SO42-也是AE的主要贡献者。无人机（UAV）对PM2.5和PM10浓度的MAX-DOAS测量反演的近地表气溶胶消光值在垂直分布上具有相同的趋势。500 m处声发射增大约3倍。利用雾霾期间气团的反向运动轨迹，我们还发现持续重污染主要是由东北地区的污染空气输送引起的，其次是持续稳定天气条件下的局部工业排放和其他排放源。(c) 2021中国科学院生态环境科学研究中心。Elsevier B.V.出版
Atmospheric aerosols have effects on atmospheric radiation assessments, global climate change, local air quality and visibility. In particular, aerosols are more likely transformed and accumulated in winter. In this paper, we used the Multi-Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) instrument to study the characteristics of aerosol type and contributions of PM2.5 chemical components to aerosol extinction (AE), vertical distribution of aerosols, and source. From December 30, 2018 to January 27, 2019, we conducted MAX-DOAS observations on Sanmenxia. The proportion of PM2.5 to PM10 was 69.48%-95.39%, indicating that the aerosol particles were mainly fine particles. By analyzing the ion data and modifying Interagency Monitoring of Protected Visual Environments (IMPROVE) method, we found that nitrate was the largest contributor to AE, accounting for 31.51%, 28.98%, and 27.95% of AE on heavily polluted, polluted, and clean days, respectively. NH4+, OC, and SO42- were also major contributors to AE. The near-surface aerosol extinction retrieved from MAX-DOAS measurement the PM2.5 and PM10 concentrations measured by an Unmanned Aerial Vehicle (UAV) have the same trend in vertical distribution. AE increased about 3 times from surface to 500 m. With the backward trajectory of the air mass during the haze, we also found that the continuous heavy pollution was mainly caused by transport of polluted air from the northeast, then followed by local industrial emissions and other sources of emissions under continuous and steady weather conditions. (c) 2021 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.