基于多轴差分吸收光谱的合肥市甲醛和乙二醛的研究

doi:10.3969/j.issn.1673-6141.2025.04.005

大气与环境光学学报 ›› 2025, Vol. 20 ›› Issue (4): 470-483.doi: 10.3969/j.issn.1673-6141.2025.04.005

基于多轴差分吸收光谱的合肥市甲醛和乙二醛的研究

冯家璇 , 李启华 *, 常博文 , 雒晋谊

安徽大学物质科学与信息技术研究院, 安徽合肥 230601

收稿日期:2023-02-13 修回日期:2023-03-24 出版日期:2025-07-28 发布日期:2025-07-25
通讯作者: E-mail: lqh628@ahu.edu.cn E-mail:lqh628@ahu.edu.cn
作者简介:冯家璇 (1997- ), 女, 湖北黄石人, 硕士研究生, 主要从事地基遥感方面的研究。E-mail: Arapay@163.com
基金资助:
中国科学院环境光学与技术重点实验室开放基金项目 (2005DP173065-2021-06), 安徽省自然科学基金项目 (2208085QD117)

Research of formaldehyde and glyoxal in Hefei based on multi-axis differential optical absorption spectroscopy

FENG Jiaxuan , LI Qihua *, CHANG Bowen , LUO Jinyi

Institute of Physical Science and Information Technology, Anhui University, Hefei 230601, China

Received:2023-02-13 Revised:2023-03-24 Online:2025-07-28 Published:2025-07-25
Contact: Qi-Hua LI E-mail:lqh628@ahu.edu.cn

摘要/Abstract

摘要： 甲醛 (HCHO) 与乙二醛 (CHOCHO) 作为大气光化学反应的中间产物，常被当作大气挥发性有机化合物 (VOCs) 的重要示踪剂，对他们的监测在区域大气污染监测方面发挥着重要作用。本研究基于2021 年7―9 月安徽大学磬苑校区 (117.18°E， 31.77°N) 多轴差分吸收光谱 (MAX-DOAS) 观测站点的HCHO和CHOCHO数据，首先选择辐射传输模型SCIATRAN作为正演模型，通过最优化估计算法对垂直廓线进行反演，随后通过与哨兵5 号卫星搭载的对流层观测仪 (TROPOMI) 观测数据的对比并结合气象数据分析了该区域HCHO 和CHOCHO 的分布与演化特征。与 TROPOMI 观测数据的强相关性证明了MAX-DOAS 数据的高置信度。进一步的分析结果表明研究区域近地面的 HCHO廓线具有明显的日变化规律，表现为中午和晚上较高；其周变化曲线与居民活动存在联系，周五至周日的 HCHO体积分数比其他工作日高出20.13%，存在明显周末效应。由于CHOCHO和HCHO作为示踪剂具有不同的形成途径，因此还研究了CHOCHO和HCHO的比率 (RGF) 来获取VOCs前体排放来源信息。RGF曲线的分析表明合肥市的VOCs排放中生物排放更为普遍，在观测期间，生物排放主导的时间段约占总观测时间的72.29%。本工作探究了合肥市HCHO和CHOCHO的分布与行为演化规律，为该地区的大气污染监测与防治提供了借鉴。

关键词: 甲醛, 多轴差分吸收光谱, 垂直廓线, 乙二醛和甲醛比率, 合肥市

Abstract: As intermediates of atmospheric photochemical reactions, formaldehyde (HCHO) and glyoxal (CHOCHO) are often used as important tracers of atmospheric volatile organic compounds (VOCs), and monitoring and investigating their distribution and evolution plays an important role in regional air pollution monitoring. This study is based on the HCHO and CHOCHO data of the multi-axis differential optical absorption spectroscopy (MAX-DOAS) observation station in Qingyuan campus of Anhui University (117.18°E, 31.77°N), Hefei, China, from July to September in 2021. Firstly, the radiative transfer model SCIATRAN is selected as the forward model, and the vertical profiles of HCHO and CHOCHO are retrieved by the optimization estimation algorithm. Then, the distribution and evolution characteristics of HCHO and CHOCHO in this region are analyzed by comparing with the observation data of Tropospheric Monitoring Instrument (TROPOMI) carried on Sentinel-5 satellite and combining with the meteorological data. The strong correlation with TROPOMI observation data proves the high confidence level of the MAXDOAS data. The results indicate that the HCHO profile near the ground has obvious diurnal variation, with higher levels at noon and at night. The weekly variation curve of HCHO is related to the activities of the residents, and it is shown that the HCHO concentration from Friday to Sunday is 20.13% higher than that of other working days, demonstrating an obvious weekend effect. Because CHOCHO and HCHO have different formation pathways as tracers, the ratio of CHOCHO to HCHO (RGF) is also studied to determine the emission source of VOC precursors. The analysis of RGF curve shows that biological VOC emissions are more prevalent in Hefei City. During the observation period, periods dominated by biological VOC emissions accounted for approximately 72.29% of the total observation time. This work explores the distribution and behavior evolution of HCHO and CHOCHO in Hefei, which provides a reference for the monitoring and prevention of air pollution in this area.

Key words: formaldehyde, multi-axis differential optical absorption spectroscopy, vertical profile, the ratio of glyoxal to formaldehyde, Hefei City

中图分类号:

P407

冯家璇, 李启华, 常博文, 雒晋谊. 基于多轴差分吸收光谱的合肥市甲醛和乙二醛的研究[J]. 大气与环境光学学报, 2025, 20(4): 470-483.

FENG Jiaxuan , LI Qihua , CHANG Bowen , LUO Jinyi. Research of formaldehyde and glyoxal in Hefei based on multi-axis differential optical absorption spectroscopy[J]. Journal of Atmospheric and Environmental Optics, 2025, 20(4): 470-483.

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基于多轴差分吸收光谱的合肥市甲醛和乙二醛的研究

Research of formaldehyde and glyoxal in Hefei based on multi-axis differential optical absorption spectroscopy

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