气候变化领域集成服务门户(CCPortal): Effects of Chemical Feedbacks on Decadal Methane Emissions Estimates

CCPortal

DOI	10.1029/2019GL085706
	Effects of Chemical Feedbacks on Decadal Methane Emissions Estimates
	Nguyen N.H.; Turner A.J.; Yin Y.; Prather M.J.; Frankenberg C.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:3
英文摘要	The coupled chemistry of methane, carbon monoxide (CO), and hydroxyl radical (OH) can modulate methane's 9-year lifetime. This is often ignored in methane flux inversions, and the impacts of neglecting interactive chemistry have not been quantified. Using a coupled-chemistry box model, we show that neglecting the effect of methane source perturbation on [OH] can lead to a 25% bias in estimating abrupt changes in methane sources after only 10 years. Further, large CO emissions, such as from biomass burning, can increase methane concentrations by extending the methane lifetime through impacts on [OH]. Finally, we quantify the biases of including (or excluding) coupled chemistry in the context of recent methane and CO trends. Decreasing CO concentrations, beginning in the 2000's, have notable impacts on methane flux inversions. Given these nonnegligible errors, decadal methane emissions inversions should incorporate chemical feedbacks for more robust methane trend analyses and source attributions. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Carbon monoxide; Chemical analysis; Biomass-burning; CO concentrations; Coupled chemistry; Hydroxyl radicals; Methane concentrations; Methane emissions; Source attribution; Source perturbation; Methane; carbon monoxide; chemical composition; concentration (composition); feedback mechanism; hydroxyl radical; methane; perturbation
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170763
作者单位	Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, United States; Department of Earth and Planetary Sciences, University of California, Berkeley, CA, United States; College of Chemistry, University of California, Berkeley, CA, United States; NASA Jet Propulsion Lab, California Institute of Technology, Pasadena, CA, United States; Department of Earth System Science, University of California, Irvine, CA, United States
推荐引用方式 GB/T 7714	Nguyen N.H.,Turner A.J.,Yin Y.,et al. Effects of Chemical Feedbacks on Decadal Methane Emissions Estimates[J],2020,47(3).
APA	Nguyen N.H.,Turner A.J.,Yin Y.,Prather M.J.,&Frankenberg C..(2020).Effects of Chemical Feedbacks on Decadal Methane Emissions Estimates.Geophysical Research Letters,47(3).
MLA	Nguyen N.H.,et al."Effects of Chemical Feedbacks on Decadal Methane Emissions Estimates".Geophysical Research Letters 47.3(2020).