DOI: 10.1002/jgrd.50133
论文题名: Air-mass origin as a diagnostic of tropospheric transport
作者: Orbe C. ; Holzer M. ; Polvani L.M. ; Waugh D.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 3 起始页码: 1459
结束页码: 1470
语种: 英语
英文关键词: air-mass fractions
; climate change
; idealized model
; tracers
; tropospheric transport
Scopus关键词: Boundary layers
; Climate change
; Climate models
; Clouds
; Kinetics
; Meteorology
; Radioactive tracers
; air-mass fractions
; Circulation models
; Eddy kinetic energy
; Hadley circulation
; Idealized models
; Industrial pollutants
; Planetary boundary layers
; tropospheric transport
; Troposphere
; air mass
; black carbon
; boundary layer
; climate change
; jet
; kinetic energy
; latitude
; subtropical region
; transport process
; troposphere
英文摘要: We introduce rigorously defined air masses as a diagnostic of tropospheric transport. The fractional contribution from each air mass partitions air at any given point according to either where it was last in the planetary boundary layer or where it was last in contact with the stratosphere. The utility of these air-mass fractions is demonstrated for the climate of a dynamical core circulation model and its response to specified heating. For an idealized warming typical of end-of-century projections, changes in air-mass fractions are in the order of 10% and reveal the model's climate change in tropospheric transport: poleward-shifted jets and surface-intensified eddy kinetic energy lead to more efficient stirring of air out of the midlatitude boundary layer, suggesting that, in the future, there may be increased transport of black carbon and industrial pollutants to the Arctic upper troposphere. Correspondingly, air is less efficiently mixed away from the subtropical boundary layer. The air-mass fraction that had last stratosphere contact at midlatitudes increases all the way to the surface, in part due to increased isentropic eddy transport across the tropopause. Correspondingly, the air-mass fraction that had last stratosphere contact at high latitudes is reduced through decreased downwelling across the tropopause. A weakened Hadley circulation leads to decreased interhemispheric transport in the model's future climate. ©2013. American Geophysical Union. All Rights Reserved. 资助项目: ATM-0854711
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63947
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY 10027, United States; Department of Applied Mathematics, School of Mathematics and Statistics, University of New South Wales, Sydney, NSW, Australia; Department of Earth and Environmental Sciences, Columbia University, New York, NY, United States; Department of Earth and Planetary Sciences, Johns Hopkins University, Baltimore, MD, United States
Recommended Citation:
Orbe C.,Holzer M.,Polvani L.M.,et al. Air-mass origin as a diagnostic of tropospheric transport[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(3)