| Title: | Identification of volatile organic compound emissions from anthropogenic and biogenic sources based on satellite observation of formaldehyde and glyoxal |
| Author(s): | Chen Y; Liu C; Su W; Hu Q; Zhang C; Liu H; Yin H; |
| Address: | "Key Lab of Environmental Optics & Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China. Key Lab of Environmental Optics & Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China; Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230026, China; Centre for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Key Laboratory of Precision Scientific Instrumentation of Anhui Higher Education Institutes, University of Science and Technology of China, Hefei 230026, China; Anhui Province Key Laboratory of Polar Environment and Global Change, University of Science and Technology of China, Hefei 230026, China. Electronic address: chliu81@ustc.edu.cn. Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, China; Key Laboratory of Atmospheric Chemistry, China Meteorological Administration, Beijing 100089, China. Electronic address: swj1993@ustc.edu.cn. Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230026, China. Institute of Physical Science and Information Technology, Anhui University, Hefei 230601, China" |
| DOI: | 10.1016/j.scitotenv.2022.159997 |
| ISSN/ISBN: | 1879-1026 (Electronic) 0048-9697 (Linking) |
| Abstract: | "Anthropogenic volatile organic compounds (VOCs) are serious pollutants in the atmosphere because of their toxicity and as precursors of secondary organic aerosols and ozone pollution. Although in-situ measurements provide accurate information on VOCs, their spatial coverage is limited and insufficient. In this study, we provide a global perspective for identifying anthropogenic VOC emission sources through the ratio of glyoxal to formaldehyde (RGF) based on satellite observations. We assessed typical cities and polluted areas in the mid latitudes and found that some Asian cities had higher anthropogenic VOC emissions than cities in Europe and America. For heavily polluted areas, such as the Yangtze River Delta (YRD), the areas dominated by anthropogenic VOCs accounted for 23 % of the total study areas. During the COVID-19 pandemic, a significant decline in RGF values was observed in the YRD and western United States, corresponding to a reduction in anthropogenic VOC emissions. Furthermore, developing countries appeared to have higher anthropogenic VOC emissions than developed countries. These observations could contribute to optimising industrial structures and setting stricter pollution standards to reduce anthropogenic VOCs in developing countries" |
| Keywords: | Humans *Volatile Organic Compounds/analysis *Air Pollutants/analysis Glyoxal Pandemics Environmental Monitoring *COVID-19/epidemiology Respiratory Aerosols and Droplets *Ozone/analysis Formaldehyde China Anthropogenic emission Ratio of glyoxal and formald; |
| Notes: | "MedlineChen, Yujia Liu, Cheng Su, Wenjing Hu, Qihou Zhang, Chengxin Liu, Haoran Yin, Hao eng Netherlands 2022/11/12 Sci Total Environ. 2023 Feb 10; 859(Pt 1):159997. doi: 10.1016/j.scitotenv.2022.159997. Epub 2022 Nov 9" |
