气候变化领域集成服务门户(CCPortal): Transport of short-lived halocarbons to the stratosphere over the Pacific Ocean

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DOI	10.5194/acp-20-1163-2020
	Transport of short-lived halocarbons to the stratosphere over the Pacific Ocean
	Filus M.T.; Atlas E.L.; Navarro M.A.; Meneguz E.; Thomson D.; Ashfold M.J.; Carpenter L.J.; Andrews S.J.; Harris N.R.P.
发表日期	2020
ISSN	16807316
起始页码	1163
结束页码	1181
卷号	20 期号:2
英文摘要	The effectiveness of transport of short-lived halocarbons to the upper troposphere and lower stratosphere remains an important uncertainty in quantifying the supply of ozone-depleting substances to the stratosphere. In early 2014, a major field campaign in Guam in the western Pacific, involving UK and US research aircraft, sampled the tropical troposphere and lower stratosphere. The resulting measurements of CH3I, CHBr3 and CH2Br2 are compared here with calculations from a Lagrangian model. This methodology benefits from an updated convection scheme that improves simulation of the effect of deep convective motions on particle distribution within the tropical troposphere. We find that the observed CH3I, CHBr3 and CH2Br2 mixing ratios in the tropical tropopause layer (TTL) are consistent with those in the boundary layer when the new convection scheme is used to account for convective transport. More specifically, comparisons between modelled estimates and observations of short-lived CH3I indicate that the updated convection scheme is realistic up to the lower TTL but is less good at reproducing the small number of extreme convective events in the upper TTL. This study consolidates our understanding of the transport of short-lived halocarbons to the upper troposphere and lower stratosphere by using improved model calculations to confirm consistency between observations in the boundary layer, observations in the TTL and atmospheric transport processes. Our results support recent estimates of the contribution of short-lived bromocarbons to the stratospheric bromine budget. © Author(s) 2020.
关键词	air sampling atmospheric convection atmospheric transport bromine compound halocarbon stratosphere tropical environment tropopause Guam Mariana Islands Pacific Ocean Pacific Ocean (West)
语种	英语
来源机构	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132267
推荐引用方式 GB/T 7714	Filus M.T.,Atlas E.L.,Navarro M.A.,et al. Transport of short-lived halocarbons to the stratosphere over the Pacific Ocean[J]. Atmospheric Chemistry and Physics,2020,20(2).
APA	Filus M.T..,Atlas E.L..,Navarro M.A..,Meneguz E..,Thomson D..,...&Harris N.R.P..(2020).Transport of short-lived halocarbons to the stratosphere over the Pacific Ocean.,20(2).
MLA	Filus M.T.,et al."Transport of short-lived halocarbons to the stratosphere over the Pacific Ocean".20.2(2020).