DOI: 10.1002/2016GL069551
论文题名: Climate model biases in jet streams, blocking and storm tracks resulting from missing orographic drag
作者: Pithan F. ; Shepherd T.G. ; Zappa G. ; Sandu I.
刊名: Geophysical Research Letters
ISSN: 0094-8941
EISSN: 1944-8672
出版年: 2016
卷: 43, 期: 13 起始页码: 7231
结束页码: 7240
语种: 英语
英文关键词: extratropical circulation
; model biases
; orographic drag
Scopus关键词: Drag
; Storms
; Atmospheric circulation
; Coupled Model Intercomparison Project
; Extratropical circulation
; Important features
; Large-scale circulation
; Model bias
; Orographic blocking
; Southern Annular Mode
; Climate models
英文摘要: State-of-the art climate models generally struggle to represent important features of the large-scale circulation. Common model deficiencies include an equatorward bias in the location of the midlatitude westerlies and an overly zonal orientation of the North Atlantic storm track. Orography is known to strongly affect the atmospheric circulation and is notoriously difficult to represent in coarse-resolution climate models. Yet how the representation of orography affects circulation biases in current climate models is not understood. Here we show that the effects of switching off the parameterization of drag from low-level orographic blocking in one climate model resemble the biases of the Coupled Model Intercomparison Project Phase 5 ensemble: An overly zonal wintertime North Atlantic storm track and less European blocking events, and an equatorward shift in the Southern Hemispheric jet and increase in the Southern Annular Mode time scale. This suggests that typical circulation biases in coarse-resolution climate models may be alleviated by improved parameterizations of low-level drag. ©2016. The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84978284917&doi=10.1002%2f2016GL069551&partnerID=40&md5=f87cab87e7e0e2a1e005a5e85bc234f4
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9904
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 Meteorology, University of Reading, Reading, United Kingdom
Recommended Citation:
Pithan F.,Shepherd T.G.,Zappa G.,et al. Climate model biases in jet streams, blocking and storm tracks resulting from missing orographic drag[J]. Geophysical Research Letters,2016-01-01,43(13).