DOI: 10.1002/2015GL064172
论文题名: Interhemispheric transit time distributions and path-dependent lifetimes constrained by measurements of SF6, CFCs, and CFC replacements
作者: Holzer M. ; Waugh D.W.
刊名: Geophysical Research Letters
ISSN: 0094-9165
EISSN: 1944-8896
出版年: 2015
卷: 42, 期: 11 起始页码: 4581
结束页码: 4589
语种: 英语
英文关键词: interhemispheric
; maximum entropy
; multiple tracers
; transit time distribution
; transport
; troposphere
Scopus关键词: Chemical analysis
; Chlorofluorocarbons
; Entropy
; Maximum entropy methods
; Sulfur hexafluoride
; Tropics
; CFC replacements
; interhemispheric
; Mean transit time
; Northern Hemispheres
; Shape parameters
; Southern Hemisphere
; Transit-time distributions
; transport
; Troposphere
英文摘要: We constrain tropospheric transport from Northern Hemisphere midlatitudes to the Southern Hemisphere (SH) surface using measurements of SF6, CFCs, and CFC replacement gases and a novel maximum-entropy-based inversion approach. We provide the first estimate of the width Δ of the tropospheric interhemispheric transit time distribution (TTD). We find that Δ has a value of ∼1.3 years that varies little with SH latitude, compared to the mean transit time Γ that increases from ∼1.1 years in the SH tropics to ∼1.4 years at the South Pole. The TTD shape parameter Δ/Γ is thus larger in the SH tropics than at middle and high SH latitudes. Our analysis introduces a simple path-dependent lifetime that parameterizes chemical losses. The path-dependent lifetimes are estimated for CFC replacements, and systematic differences between path-dependent and global lifetimes are interpreted. The path-dependent lifetimes have the potential to provide new observational constraints on tropospheric and stratospheric loss processes. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84934343843&doi=10.1002%2f2015GL064172&partnerID=40&md5=4c3d9fbdbb50c5880dde933a0262aaf5
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8781
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Applied Mathematics, School of Mathematics and Statistics, University of New South Wales, Sydney, NSW, Australia
Recommended Citation:
Holzer M.,Waugh D.W.. Interhemispheric transit time distributions and path-dependent lifetimes constrained by measurements of SF6, CFCs, and CFC replacements[J]. Geophysical Research Letters,2015-01-01,42(11).