| Title: | First global observation of tropospheric formaldehyde from Chinese GaoFen-5 satellite: Locating source of volatile organic compounds |
| Author(s): | Su W; Liu C; Hu Q; Zhang C; Liu H; Xia C; Zhao F; Liu T; Lin J; Chen Y; |
| Address: | "Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei, 230026, China. Key Lab of Environmental Optics & Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, 230031, China; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, 230026, China; Key Laboratory of Precision Scientific Instrumentation of Anhui Higher Education Institutes, University of Science and Technology of China, Hefei, 230026, China. Electronic address: chliu81@ustc.edu.cn. 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. Institute of Physical Science and Information Technology, Anhui University, Hefei, 230601, China. School of Earth and Space Sciences, University of Science and Technology of China, Hefei, 230026, China" |
| DOI: | 10.1016/j.envpol.2021.118691 |
| ISSN/ISBN: | 1873-6424 (Electronic) 0269-7491 (Linking) |
| Abstract: | "Satellite remote sensing is an important technique providing long-term and large-scale information of formaldehyde (HCHO), which plays a crucial role in atmospheric chemistry. Low signal-to-noise ratio and poor stability of the Environmental Trace Gases Monitoring Instrument (EMI) On board Gaofen-5 satellite, the first Chinese space-borne spectrometer, make HCHO retrieval extremely difficult. Here we firstly retrieved HCHO vertical column densities (VCDs) from EMI through in-flight spectral calibration, retrieval setting optimization and stripe correction. Retrieved EMI HCHO VCDs correlate well with those measured by Multi-AXis Differential Optical Absorption Spectroscopy (MAX-DOAS) with normalize mean bias (NMB) below 25%. EMI HCHO VCDs are comparable with those observed by Ozone Monitoring Instrument (OMI) and TROPOspheric Monitoring Instrument (TROPOMI). This study reveals that HCHO can be observed successfully by algorithm optimization despite of poor performance of space-borne spectrometer. The retrieved EMI HCHO VCDs are applied to locate emission sources of volatile organic compounds (VOCs)" |
| Keywords: | *Air Pollutants/analysis China Formaldehyde/analysis Nitrogen Dioxide/analysis *Ozone/analysis *Volatile Organic Compounds Emi GaoFen-5 satellite HCHO retrieval VOCs emission Source; |
| Notes: | "MedlineSu, Wenjing Liu, Cheng Hu, Qihou Zhang, Chengxin Liu, Haoran Xia, Congzi Zhao, Fei Liu, Ting Lin, Jinan Chen, Yujia eng England 2021/12/19 Environ Pollut. 2022 Mar 15; 297:118691. doi: 10.1016/j.envpol.2021.118691. Epub 2021 Dec 15" |
