DOI: 10.1175/JCLI-D-17-0520.1
Scopus记录号: 2-s2.0-85054061246
论文题名: The importance of a properly represented stratosphere for Northern Hemisphere surface variability in the atmosphere and the ocean
作者: Haase S. ; Matthes K. ; Latif M. ; Omrani N.-E.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 20 起始页码: 8481
结束页码: 8497
语种: 英语
英文关键词: Atmosphere-ocean interaction
; North Atlantic Oscillation
; Oceanic mixed layer
; Stratosphere-troposphere coupling
Scopus关键词: Atmospheric pressure
; Atmospheric thermodynamics
; Heat flux
; Natural convection
; Oceanography
; Troposphere
; Upper atmosphere
; Atlantic meridional overturning circulations
; Atmosphere-ocean interactions
; Coupled climate model
; North Atlantic oscillations
; Oceanic mixed layers
; Stratosphere-troposphere coupling
; Stratospheric warmings
; Subpolar North Atlantic
; Climate models
英文摘要: Major sudden stratospheric warmings (SSWs) are extreme events during boreal winter, which not only impact tropospheric weather up to three months but also can influence oceanic variability through wind stress and heat flux anomalies. In the North Atlantic region, SSWs have the potential to modulate deep convection in the Labrador Sea and thereby the strength of the Atlantic meridional overturning circulation. The impact of SSWs on the Northern Hemisphere surface climate is investigated in two coupled climate models: a stratosphere-resolving (high top) and a non-stratosphere-resolving (low top) model. In both configurations, a robust link between SSWs and a negative NAO is detected, which leads to shallower-than-normal North Atlantic mixed layer depth. The frequency of SSWs and the persistence of this link is better captured in the high-top model. Significant differences occur over the Pacific region, where an unrealistically persistent Aleutian low is observed in the low-top configuration. An overrepresentation of SSWs during El Niño conditions in the low-top model is the main cause for this artifact. Our results underline the importance of a proper representation of the stratosphere in a coupled climate model for a consistent surface response in both the atmosphere and the ocean, which, among others, may have implications for oceanic deep convection in the subpolar North Atlantic. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110679
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: GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany; Christian-Albrechts-Universität zu Kiel, Kiel, Germany; Geophysical Institute, University of Bergen, Norway; Bjerknes Centre for Climate Research, Bergen, Norway
Recommended Citation:
Haase S.,Matthes K.,Latif M.,et al. The importance of a properly represented stratosphere for Northern Hemisphere surface variability in the atmosphere and the ocean[J]. Journal of Climate,2018-01-01,31(20)