气候变化领域集成服务门户(CCPortal): Short Black Carbon lifetime inferred from a global set of aircraft observations

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DOI	10.1038/s41612-018-0040-x
	Short Black Carbon lifetime inferred from a global set of aircraft observations
	Lund M.T.; Samset B.H.; Skeie R.B.; Watson-Parris D.; Katich J.M.; Schwarz J.P.; Weinzierl B.
发表日期	2018
ISSN	23973722
卷号	1 期号:1
英文摘要	Black Carbon (BC) aerosols substantially affect the global climate. However, accurate simulation of BC atmospheric transport remains elusive, due to shortcomings in modeling and a shortage of constraining measurements. Recently, several studies have compared simulations with observed vertical concentration profiles, and diagnosed a global-mean BC atmospheric residence time of <5 days. These studies have, however, been focused on limited geographical regions, and used temporally and spatially coarse model information. Here we expand on previous results by comparing a wide range of recent aircraft measurements from multiple regions, including the Arctic and the Atlantic and Pacific oceans, to simulated distributions obtained at varying spatial and temporal resolution. By perturbing BC removal processes and using current best-estimate emissions, we confirm a constraint on the global-mean BC lifetime of <5.5 days, shorter than in many current global models, over a broader geographical range than has so far been possible. Sampling resolution influences the results, although generally without introducing major bias. However, we uncover large regional differences in the diagnosed lifetime, in particular in the Arctic. We also find that only a weak constraint can be placed in the African outflow region over the South Atlantic, indicating inaccurate emission sources or model representation of transport and microphysical processes. While our results confirm that BC lifetime is shorter than predicted by most recent climate models, they also cast doubt on the usability of the concept of a “global-mean BC lifetime” for climate impact studies, or as an indicator of model skill. © 2018, The Author(s).
语种	英语
scopus关键词	accuracy assessment; aerosol; airborne survey; atmospheric transport; black carbon; climate modeling; computer simulation; numerical model; spatial variation; temporal variation; Arctic Ocean; Atlantic Ocean; Pacific Ocean
来源期刊	npj Climate and Atmospheric Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178185
作者单位	CICERO – Center for International Climate Research, Oslo, Norway; Department of Physics, Atmospheric, Oceanic and Planetary Physics, University of Oxford, Oxford, United Kingdom; Chemical Science Division, NOAA Earth System Research Laboratory, Boulder, CO, United States; Cooperative Institute for Research in Environmental Science, Boulder, CO, United States; Aerosol Physics and Environmental Physics, University of Vienna, Vienna, Austria
推荐引用方式 GB/T 7714	Lund M.T.,Samset B.H.,Skeie R.B.,et al. Short Black Carbon lifetime inferred from a global set of aircraft observations[J],2018,1(1).
APA	Lund M.T..,Samset B.H..,Skeie R.B..,Watson-Parris D..,Katich J.M..,...&Weinzierl B..(2018).Short Black Carbon lifetime inferred from a global set of aircraft observations.npj Climate and Atmospheric Science,1(1).
MLA	Lund M.T.,et al."Short Black Carbon lifetime inferred from a global set of aircraft observations".npj Climate and Atmospheric Science 1.1(2018).