DOI: 10.1175/JCLI-D-15-0860.1
Scopus记录号: 2-s2.0-84991219458
论文题名: North Atlantic storm-track sensitivity to projected sea surface temperature: Local versus remote influences
作者: Ciasto L.M. ; Li C. ; Wettstein J.J. ; Kvamstø N.G.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 19 起始页码: 6973
结束页码: 6991
语种: 英语
Scopus关键词: Atmospheric structure
; Atmospheric temperature
; Atmospheric thermodynamics
; Climate models
; Earth (planet)
; Earth atmosphere
; Global warming
; Greenhouse gases
; Mechanical waves
; Sea ice
; Storms
; Submarine geophysics
; Surface properties
; Surface waters
; Tropics
; Upper atmosphere
; Atmosphere-ocean interactions
; Geographic location
; North Atlantic Ocean
; Storm track
; Upper troposphere
; Oceanography
英文摘要: This study investigates the sensitivity of the North Atlantic storm track to future changes in local and global sea surface temperature (SST) and highlights the role of SST changes remote to the North Atlantic. Results are based on three related coupled climate models: the Community Climate System Model, version 4 (CCSM4), the Community Earth System Model, version 1 (Community Atmosphere Model, version 5) [CESM1(CAM5)], and the Norwegian Earth System Model, version 1 (intermediate resolution) (NorESM1-M). Analysis reveals noticeable intermodel differences in projected storm-track changes from the coupled simulations [i.e., the difference in 200-hPa eddy activity between the representative concentration pathway 8.5 (RCP8.5) and historical scenarios]. In the CCSM4 coupled simulations, the North Atlantic storm track undergoes a poleward shift and eastward extension. In CESM1(CAM5), the storm-track change is dominated by an intensification and eastward extension. In NorESM1-M, the storm-track change is characterized by a weaker intensification and slight eastward extension. Atmospheric experiments driven only by projected local (North Atlantic) SST changes from the coupled models fail to reproduce the magnitude and structure of the projected changes in eddy activity aloft and zonal wind from the coupled simulations. Atmospheric experiments driven by global SST and sea ice changes do, however, reproduce the eastward extension. Additional experiments suggest that increasing greenhouse gas (GHG) concentrations do not directly influence storm-track changes in the coupled simulations, although they do through GHG-induced changes in SST. The eastward extension of the North Atlantic storm track is hypothesized to be linked to western Pacific SST changes that influence tropically forced Rossby wave trains, but further studies are needed to isolate this mechanism from other dynamical adjustments to global warming. © 2016 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50085
Appears in Collections: 气候变化事实与影响
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作者单位: Geophysical Institute, University of Bergen, Bergen, Norway; Bjerknes Centre for Climate Research, Bergen, Norway; College of Earth, Ocean, Oregon State University, Corvallis, OR, United States; Atmospheric Sciences, Oregon State University, Corvallis, OR, United States
Recommended Citation:
Ciasto L.M.,Li C.,Wettstein J.J.,et al. North Atlantic storm-track sensitivity to projected sea surface temperature: Local versus remote influences[J]. Journal of Climate,2016-01-01,29(19)