DOI: 10.1175/JCLI-D-17-0792.1
Scopus记录号: 2-s2.0-85052945672
论文题名: Connecting the energy and momentum flux response to climate change using the Eliassen-Palm relation
作者: Lachmy O. ; Shaw T.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 18 起始页码: 7401
结束页码: 7416
语种: 英语
英文关键词: Atmospheric circulation
; Climate change
; Energy budget/balance
; Energy transport
; Fluxes
; Momentum
Scopus关键词: Atmospheric movements
; Budget control
; Climate models
; Fluxes
; Molecular physics
; Momentum
; Potential energy
; Storms
; Atmospheric circulation
; CO2 concentration
; Coupled climate model
; Eddy momentum flux
; Energy budget/balance
; Energy transport
; Extratropical storms
; Zonal-mean zonal winds
; Climate change
英文摘要: Coupled climate models project that extratropical storm tracks and eddy-driven jets generally shift poleward in response to increased CO2 concentration. Here the connection between the storm-track and jet responses to climate change is examined using the Eliassen-Palm (EP) relation. The EP relation states that the eddy potential energy flux is equal to the eddy momentumflux times the Doppler-shifted phase speed. The EP relation can be used to connect the storm-track and eddy-driven jet responses to climate change assuming 1) the storm-track and eddy potential energy flux responses are consistent and 2) the response of the Dopplershifted phase speed is negligible. Weexamine the extent to which the EP relation connects the eddy-driven jet (eddy momentum flux convergence) response to climate change with the storm-track (eddy potential energy flux) response in two idealized aquaplanet model experiments. The two experiments, which differ in their radiation schemes, both show a poleward shift of the storm track in response to climate change. However, the eddy-driven jet shifts poleward using the sophisticated radiation scheme but equatorward using the gray radiation scheme. The EP relation gives a good approximation of the momentum flux response and the eddydriven jet shift, given the eddy potential energy flux response, because the Doppler-shifted phase speed response is negligible. According to the EP relation, the opposite shift of the eddy-driven jet for the different radiation schemes is associated with dividing the eddy potential energy flux response by the climatological Doppler-shifted phase speed, which is dominated by the zonal-mean zonal wind. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110703
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Department of Geophysical Sciences, University of Chicago, Chicago, IL, United States; Department of Natural Sciences, The Open University of Israel, Ra'anana, Israel
Recommended Citation:
Lachmy O.,Shaw T.. Connecting the energy and momentum flux response to climate change using the Eliassen-Palm relation[J]. Journal of Climate,2018-01-01,31(18)