DOI: 10.1002/jgrd.50636
论文题名: Horizontal water vapor transport in the lower stratosphere from subtropics to high latitudes during boreal summer
作者: Ploeger F. ; Günther G. ; Konopka P. ; Fueglistaler S. ; Müller R. ; Hoppe C. ; Kunz A. ; Spang R. ; Grooß J.-U. ; Riese M.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 14 起始页码: 8111
结束页码: 8127
语种: 英语
英文关键词: Asian monsoon
; horizontal transport
; stratosphere-troposphere exchange
; UTLS
; water vapor
; water vapor continuity equation
Scopus关键词: Atmospheric thermodynamics
; Computer simulation
; Lagrange multipliers
; Mixing
; Tropics
; Upper atmosphere
; Asian monsoon
; Continuity equations
; Horizontal transport
; Stratosphere-troposphere exchange
; UTLS
; Water vapor
; annual cycle
; Boreal
; eddy
; microwave limb sounder
; mixing ratio
; Northern Hemisphere
; stratosphere
; summer
; water vapor
; Bivalvia
英文摘要: We compare global water vapor observations from Microwave Limb Sounder (MLS) and simulations with the Lagrangian chemical transport model CLaMS (Chemical Lagrangian Model of the Stratosphere) to investigate the pathways of water vapor into the lower stratosphere during Northern Hemisphere (NH) summer. We find good agreement between the simulation and observations, with an effect of the satellite averaging kernel especially at high latitudes. The Asian and American monsoons emerge as regions of particularly high water vapor mixing ratios in the lower stratosphere during boreal summer. In NH midlatitudes and high latitudes, a clear anticorrelation between water vapor and ozone daily tendencies reveals a large region influenced by frequent horizontal transport from low latitudes, extending up to about 450K during summer and fall. Analysis of the zonal mean tracer continuity equation shows that close to the subtropics, this horizontal transport is mainly caused by the residual circulation. In contrast, at higher latitudes, poleward of about 50°N, eddy mixing dominates the horizontal water vapor transport. Model simulations with transport barriers confirm that almost the entire annual cycle of water vapor in NH midlatitudes above about 360K, with maximum mixing ratios during summer and fall, is caused by horizontal transport from low latitudes. In the model, highest water vapor mixing ratios in this region are clearly linked to horizontal transport from the subtropics. Key Points High H2O in mid-latitude UTLS is horizontally transported from subtropics Annual H2O cycle in NH UTLS (360-450K) is linked to horizontal transport Hor. transport due to residual circ. equatorwards 50N, to eddy mixing polewards ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63544
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: Institute of Energy and Climate Research, Stratosphere (IEK-7), Forschungszentrum Jülich, 52 425 Jülich, Germany; Department of Geosciences, Princeton University, Princeton NJ, United States; Institute for Atmospheric and Climate Science, ETH Zuerich, Zuerich, Switzerland
Recommended Citation:
Ploeger F.,Günther G.,Konopka P.,et al. Horizontal water vapor transport in the lower stratosphere from subtropics to high latitudes during boreal summer[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(14)