Trends and drivers of anthropogenic NOx emissions in China since 2020

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外文摘要：Nitrogen oxides(NOx),significant contributors to air pollution and climate change,form aerosols and ozone in the atmosphere.Accurate,timely,and transparent information on NOx emissions is essential for decision-making to mitigate both haze and ozone pollution.However,a comprehensive understanding of the trends and drivers behind anthropogenic NOx emissions from China—the world's largest emit-ter—has been lacking since 2020 due to delays in emissions reporting.Here we show a consistent decline in China's NOx emissions from 2020 to 2022,despite increased fossil fuel consumption,utilizing satellite observations as constraints for NOx emission estimates through atmospheric inversion.This reduction is corroborated by data from two independent spaceborne instruments:the TROPOspheric Monitoring Instrument(TROPOMI)and the Ozone Monitoring Instrument(OMI).Notably,a reduction in transport emissions,largely due to the COVID-19 lockdowns,slightly decreased China's NOx emissions in 2020.In subsequent years,2021 and 2022,reductions in NOx emissions were driven by the industry and transport sectors,influenced by stringent air pollution controls.The satellite-based inversion system developed in this study represents a significant advancement in the real-time monitoring of regional air pollution emissions from space.

外文关键词：

China's NOx emissionsPollution controlSocio-economic driversAtmospheric inversion

作者：

Hui Li、Bo Zheng、Yu Lei、Didier Hauglustaine、Cuihong Chen、Xin Lin、Yi Zhang、Qiang Zhang、Kebin He

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作者单位：

Shenzhen Key Laboratory of Ecological Remediation and Carbon Sequestration,Institute of Environment and Ecology,Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,China

State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex,Beijing 100084,China

State Environmental Protection Key Laboratory of Environmental Planning and Policy Simulation and Center of Air Quality Simulation and System Analysis,Chinese Academy of Environmental Planning,Beijing 100041,China

Laboratoire des Sciences du Climat et de l'Environnement,LSCE/IPSL,CEA-CNRS-UVSQ,Université Paris-Saclay,Gif-sur-Yvette,France

Center for Satellite Application on Ecology and Environment,Ministry of Ecology and Environment of China,Beijing 100094,China

Institute of Future Human Habitats,Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,China

Ministry of Education Key Laboratory for Earth System Modeling,Department of Earth System Science,Tsinghua University,Beijing,100084,China

State Key Joint Laboratory of Environment Simulation and Pollution Control,School of Environment,Tsinghua University,Beijing 100084,China

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出版年：

2024

DOI：

10.1016/j.ese.2024.100425

环境科学与生态技术(英文)

ISSN：

年,卷(期)：2024.21(5)