气候变化领域集成服务门户(CCPortal): Accelerating methane growth rate from 2010 to 2017: Leading contributions from the tropics and East Asia

CCPortal

DOI	10.5194/acp-21-12631-2021
	Accelerating methane growth rate from 2010 to 2017: Leading contributions from the tropics and East Asia
	Yin Y.; Chevallier F.; Ciais P.; Bousquet P.; Saunois M.; Zheng B.; Worden J.; Bloom A.A.; Parker R.J.; Jacob D.J.; Dlugokencky E.J.; Frankenberg C.
发表日期	2021
ISSN	1680-7316
起始页码	12631
结束页码	12647
卷号	21 期号:16
英文摘要	After stagnating in the early 2000s, the atmospheric methane growth rate has been positive since 2007 with a significant acceleration starting in 2014. While the causes for previous growth rate variations are still not well determined, this recent increase can be studied with dense surface and satellite observations. Here, we use an ensemble of six multi-species atmospheric inversions that have the capacity to assimilate observations of the main species in the methane oxidation chain - namely, methane, formaldehyde, and carbon monoxide - to simultaneously optimize both the methane sources and sinks at each model grid. We show that the surge of the atmospheric growth rate between 2010-2013 and 2014-2017 is most likely explained by an increase of global CH4 emissions by 17.5±1.5 Tg yr-1 (mean ± 1σ), while variations in the hydroxyl radicals (OH) remained small. The inferred emission increase is consistently supported by both surface and satellite observations, with leading contributions from the tropical wetlands (∼35 %) and anthropogenic emissions in China (∼20 %). Such a high consecutive atmospheric growth rate has not been observed since the 1980s and corresponds to unprecedented global total CH4 emissions. © Copyright:
语种	英语
scopus关键词	atmospheric chemistry; carbon monoxide; formaldehyde; growth rate; hydroxyl radical; methane; 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/246633
作者单位	Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, United States; Laboratoire des Sciences du Climat et de l'Environnement, CEA-CNRS-UVSQ, Gif-sur-Yvette, France; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; National Centre for Earth Observation, University of Leicester, Leicester, United Kingdom; School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, United States; NOAA, Global Monitoring Laboratory, Boulder, CO, United States
推荐引用方式 GB/T 7714	Yin Y.,Chevallier F.,Ciais P.,et al. Accelerating methane growth rate from 2010 to 2017: Leading contributions from the tropics and East Asia[J],2021,21(16).
APA	Yin Y..,Chevallier F..,Ciais P..,Bousquet P..,Saunois M..,...&Frankenberg C..(2021).Accelerating methane growth rate from 2010 to 2017: Leading contributions from the tropics and East Asia.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(16).
MLA	Yin Y.,et al."Accelerating methane growth rate from 2010 to 2017: Leading contributions from the tropics and East Asia".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.16(2021).