Satellite UV-Vis spectroscopy: implications for air quality trends and their driving forces in China during 2005–2017

Chengxin Zhang; Cheng Liu; Qihou Hu; Zhaonan Cai; Wenjing Su; Congzi Xia; Yizhi Zhu; Siwen Wang; Jianguo Liu

doi:10.1038/s41377-019-0210-6

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Satellite UV-Vis spectroscopy: implications for air quality trends and their driving forces in China during 2005–2017

Article

- Satellite UV-Vis spectroscopy: implications for air quality trends and their driving forces in China during 2005–2017
- Light: Science & Applications Vol. 8, Issue 6, Pages: 998-1009(2019)
- Affiliations：
  
  1.School of Earth and Space Sciences, University of Science and Technology of China, 230026 Hefei, China
  2.Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, 230026 Hefei, China
  3.Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, 230031 Hefei, China
  4.Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, 361021 Xiamen, China
  5.Key Laboratory of Precision Scientific Instrumentation of Anhui Higher Education Institutes, University of Science and Technology of China, 230026 Hefei, China
  6.Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, 100029 Beijing, China
  7.Multiphase Chemistry Department, Max Planck Institute for Chemistry, 55128 Mainz, Germany
- Author bio：
  
  Cheng Liu (chliu81@ustc.edu.cn)
  Qihou Hu (qhhu@aiofm.ac.cn)
  Zhaonan Cai (caizhaonan@mail.iap.ac.cn)
- Funds：
- DOI：10.1038/s41377-019-0210-6
  CLC：
- Published：2019，
  
  Published Online：13 November 2019，
  
  Received：05 June 2019，
  
  Revised：11 October 2019，
  
  Accepted：29 October 2019
- Accepted：
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Zhang, C. X. et al. Satellite UV-Vis spectroscopy: implications for air quality trends and their driving forces in China during 2005–2017. Light: Science & Applications, 8, 998-1009 (2019).
DOI：

Zhang, C. X. et al. Satellite UV-Vis spectroscopy: implications for air quality trends and their driving forces in China during 2005–2017. Light: Science & Applications, 8, 998-1009 (2019). DOI： 10.1038/s41377-019-0210-6.

摘要

Abstract

Abundances of a range of air pollutants can be inferred from satellite UV-Vis spectroscopy measurements by using the unique absorption signatures of gas species. Here

we implemented several spectral fitting methods to retrieve tropospheric NO

and HCHO from the ozone monitoring instrument (OMI)

with radiative simulations providing necessary information on the interactions of scattered solar light within the atmosphere. We analyzed the spatial distribution and temporal trends of satellite-observed air pollutants over eastern China during 2005–2017

especially in heavily polluted regions. We found significant decreasing trends in NO

and SO

since 2011 over mos

t regions

despite varying temporal features and turning points. In contrast

an overall increasing trend was identified for tropospheric HCHO over these regions in recent years. Furthermore

generalized additive models were implemented to understand the driving forces of air quality trends in China and assess the effectiveness of emission controls. Our results indicated that although meteorological parameters

such as wind

water vapor

solar radiation and temperature

mainly dominated the day-to-day and seasonal fluctuations in air pollutants

anthropogenic emissions played a unique role in the long-term variation in the ambient concentrations of NO

and HCHO in the past 13 years. Generally

recent declines in NO

and SO

could be attributed to emission reductions due to effective air quality policies

and the opposite trends in HCHO may urge the need to control anthropogenic volatile organic compound (VOC) emissions.

关键词

Keywords

references

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