DOI: 10.1007/s00382-017-3722-x
Scopus记录号: 2-s2.0-85019560735
论文题名: Poleward energy transport: is the standard definition physically relevant at all time scales?
作者: Liang M. ; Czaja A. ; Graversen R. ; Tailleux R.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 50, 期: 2018-05-06 起始页码: 1785
结束页码: 1797
语种: 英语
英文关键词: Climate variability
; Heat transport
Scopus关键词: climate modeling
; climate variation
; eddy
; energy budget
; heat transfer
; mass transport
; regional climate
英文摘要: Poleward energy transport in the atmosphere and oceans constitutes an important branch of the global energy budget, and its role in the climate system has been the subject of many studies. In the atmosphere, the transport is affected by “eddies” and large scale meridional cells, both with zero net mass transport across latitude circles, but also partly by processes associated with a net transport of mass across latitude circles. The latter must cease to operate in steady state, but they may be significant when time variability of the heat budget is considered. Indeed, examination of reanalysis data on short (daily to monthly) timescales shows that mass variations on these timescales result in surprisingly large fluctuations (in excess of 10 15 W = 1 PW) in the poleward heat transport. These fluctuations are referred to as “extensive”, for they primarily alter the mass integrated energy of the region considered, but not its averaged value. It is suggested that extensive fluctuations mask more meaningful climate signals present in the heat transport variability on monthly and interannual timescales, and a new formulation is proposed to isolate the latter. This new formulation is applied successfully to reanalysis data and climate model simulations. © 2017, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109413
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 Physics, Imperial College London, London, United Kingdom; Department of Physics and Technology, University of Tromsø, Tromsø, Norway; Department of Meteorology, University of Reading, Reading, United Kingdom
Recommended Citation:
Liang M.,Czaja A.,Graversen R.,et al. Poleward energy transport: is the standard definition physically relevant at all time scales?[J]. Climate Dynamics,2018-01-01,50(2018-05-06)