基于卫星的城市VOCs高值区识别及长时序变化

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摘要基于卫星等多源数据研究了臭氧污染季(5~9月)城市VOCs高值区识别方法,并结合卫星监测HCHO柱浓度对北京臭氧污染季VOCs空间分布和2005~2023年长时序变化特征进行讨论.结果表明,北京VOCs浓度在京津冀范围内处于较高水平,其分布受人类活动影响显著,人为源主要影响区的HCHO总量是自然源主要影响区的3.4倍.固定源VOCs高值区多出现在北京城区的北部、中偏东和西南部,其中61%为工艺过程源和工业溶剂使用源,主要分布在五环以外;39%为汽车维修、物流仓储等,主要沿高速路分布.该识别方法为精准监管提供了范围和对象,提升了2023年夏季臭氧污染防治工作效率.从年际变化来看,2005~2018年北京VOCs浓度呈升高趋势,与人类活动增长关系密切,去温度依赖后的HCHO柱浓度升高幅度约26%;2018~2023年呈下降趋势,柱浓度下降幅度约11%,体现了近年VOCs治理成效.

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	王新辉
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	沈秀娥
	王琴
	余超

关键词 ：卫星遥感, HCHO, VOCs, 高值区识别, 时空变化特征

Abstract：This paper combined multi-source data to develop the identification approach of VOCs high-emission areas during ozone pollution season (from May to September). At the same time, the spatial distribution pattern and long-term change trend of VOCs during the ozone pollution season in Beijing from 2005 to 2023 was examined and discussed based on satellite-derived HCHO column concentration. The results showed that the concentration of VOCs in Beijing is at a high level within the Beijing-Tianjin-Hebei region, and its distribution was significantly affected by human activities. The total amount of HCHO in the areas of anthropogenic sources dominated was 3.4times of that of natural sources dominated. The high emission areas of anthropogenic sources mostly appeared in the northern, central eastern, and southwestern parts of the urban area of Beijing City. Approximately 61% of the areas were sources of industrial production process and solvent usage, and mainly distributed outside the Fifth Ring Road. Approximately 39% of them were sources of automobile maintenance, logistics warehousing etc., and mainly distributed along highways. This identification method has improved the effectiveness of ozone pollution prevention and control work in the summer of 2023, offering technical support for locating key regulatory objects and areas. From the perspective of interannual variations, the column concentration of VOCs in Beijing showed an increasing trend from 2005 to 2018, with an increase of about 26% (after correction of temperature), while it showed a downward trend from 2018 to 2023, with a decrease of about 11%, reflecting the effectiveness of VOCs emission control in recent years.

Key words： satellite remote sensing HCHO VOCs high emission area spatiotemporal variations

收稿日期: 2024-06-17

PACS:

X511

基金资助:北京市科技计划项目(Z231100003823018)

通讯作者: 李金香,教授级高工,lijinxiang@bjmemc.com.cn E-mail: lijinxiang@bjmemc.com.cn

作者简介: 王新辉(1990-),女,山东泰安人,高级工程师,硕士,主要从事大气环境遥感定量化及应用方面的研究.发表论文2篇.wangxinhui1@126.com.

引用本文:

王新辉, 李金香, 姜磊, 鹿海峰, 沈秀娥, 王琴, 余超. 基于卫星的城市VOCs高值区识别及长时序变化[J]. 中国环境科学, 2025, 45(1): 66-77. WANG Xin-hui, LI Jin-xiang, JIANG Lei, LU Hai-feng, SHEN Xiu-e, WANG Qin, YU Chao. Identification of VOCs high-emission areas and analysis of long-term changes in urban area based on satellite observation. CHINA ENVIRONMENTAL SCIENCECE, 2025, 45(1): 66-77.

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http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2025/V45/I1/66

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