气候变化领域集成服务门户(CCPortal): Recent ozone trends in the Chinese free troposphere: Role of the local emission reductions and meteorology

CCPortal

DOI	10.5194/acp-21-16001-2021
	Recent ozone trends in the Chinese free troposphere: Role of the local emission reductions and meteorology
	Dufour G.; Hauglustaine D.; Zhang Y.; Eremenko M.; Cohen Y.; Gaudel A.; Siour G.; Lachatre M.; Bense A.; Bessagnet B.; Cuesta J.; Ziemke J.; Thouret V.; Zheng B.
发表日期	2021
ISSN	1680-7316
起始页码	16001
结束页码	16025
卷号	21 期号:20
英文摘要	Free tropospheric ozone (O3) trends in the Central East China (CEC) and export regions are investigated for 2008-2017 using the IASI (Infrared Atmospheric Sounding Interferometer) O3 observations and the LMDZ-OR-INCA model simulations, including the most recent Chinese emission inventory. The observed and modelled trends in the CEC region are-0.07±0.02 and-0.08±0.02DUyr-1, respectively, for the lower free troposphere (3-6km column) and-0.05±0.02 and-0.06±0.02DUyr-1, respectively, for the upper free troposphere (6-9km column). The statistical p value is smaller to 0.01 for all the derived trends. A good agreement between the observations and the model is also observed in the region, including the Korean Peninsula and Japan and corresponding to the region of pollution export from China. Based on sensitivity studies conducted with the model, we evaluate, at 60% and 52%, the contribution of the Chinese anthropogenic emissions to the trend in the lower and upper free troposphere, respectively. The second main contribution to the trend is the meteorological variability (34% and 50%, respectively). These results suggest that the reduction in NOx anthropogenic emissions that has occurred since 2013 in China led to a decrease in ozone in the Chinese free troposphere, contrary to the increase in ozone at the surface. We designed some tests to compare the trends derived by the IASI observations and the model to independent measurements, such as the In-service Aircraft for a Global Observing System (IAGOS) or other satellite measurements (Ozone Monitoring Instrument (OMI)/Microwave Limb Sounder (MLS)). These comparisons do not confirm the O3 decrease and stress the difficulty in analysing short-term trends using multiple data sets with various sampling and the risk of overinterpreting the results. © 2021 Gaëlle Dufour et al.
语种	英语
scopus关键词	computer simulation; emission control; emission inventory; IASI; meteorology; ozone; trend analysis; troposphere; China
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246471
作者单位	Université de Paris, Univ Paris Est Creteil, CNRS, LISA, Paris, 75013, France; Laboratoire des Sciences du Climat et de l'Environnement (LSCE), UMR 8212, CEA-CNRS-UVSQ, Gif-sur-Yvette, France; Univ Paris Est Creteil, Université de Paris, CNRS, LISA, Créteil, 94010, France; CIRES, University of Colorado, NOAA Chemical Sciences Laboratory, Boulder, CO, United States; LMD/IPSL, École Polytechnique, Institut Polytechnique de Paris, ENS, PSL Université, Sorbonne Université, CNRS, Palaiseau, France; Ecole Polytechnique, Institut Polytechnique de Paris, ENS, PSL Université, Sorbonne Université, CNRS, Palaiseau, 91128, France; NASA Goddard SpaceFlight Center, Greenbelt, MD, United States; Morgan State University, Baltimore, MD, United States; Laboratoire d'Aérologie, Université de Toulouse, CNRS, UPS, Toulouse, France; Institute of Environment and Ecology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China; School of Environmental Science and Engineering, Nanjing Univers...
推荐引用方式 GB/T 7714	Dufour G.,Hauglustaine D.,Zhang Y.,et al. Recent ozone trends in the Chinese free troposphere: Role of the local emission reductions and meteorology[J],2021,21(20).
APA	Dufour G..,Hauglustaine D..,Zhang Y..,Eremenko M..,Cohen Y..,...&Zheng B..(2021).Recent ozone trends in the Chinese free troposphere: Role of the local emission reductions and meteorology.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(20).
MLA	Dufour G.,et al."Recent ozone trends in the Chinese free troposphere: Role of the local emission reductions and meteorology".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.20(2021).