DOI: 10.1175/JCLI-D-15-0014.1
Scopus记录号: 2-s2.0-84980340191
论文题名: Interhemispheric asymmetry of warming in an eddy-permitting coupled sector model
作者: Hutchinson D.K. ; England M.H. ; Hogg A.M. ; Snow K.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 18 起始页码: 7385
结束页码: 7406
语种: 英语
Scopus关键词: Atmospheric thermodynamics
; Heat transfer
; Ocean currents
; Oceanography
; Poles
; Sea ice
; Surface waters
; Atmosphere-ocean interactions
; Boundary currents
; Eddies
; Ocean dynamics
; Ocean model
; Climate models
; air-sea interaction
; asymmetry
; atmosphere-ocean coupling
; boundary current
; climate modeling
; Northern Hemisphere
; oceanic circulation
; regional climate
; sea ice
; Southern Hemisphere
; warming
英文摘要: Climate model projections and observations show a faster rate of warming in the Northern Hemisphere (NH) than the Southern Hemisphere (SH). This asymmetry is partly due to faster rates of warming over the land than the ocean, and partly due to the ocean circulation redistributing heat toward the NH. This study examines the interhemispheric warming asymmetry in an intermediate complexity coupled climate model with eddy-permitting (0.25°) ocean resolution, and results are compared with a similar model with coarse (1°) ocean resolution. The models use a pole-to-pole 60° wide sector domain in the ocean and a 120° wide sector in the atmosphere, with Atlantic-like bathymetry and a simple land model. There is a larger high-latitude ocean temperature asymmetry in the 0.25° model compared with the 1° model, both in equilibrated control runs and in response to greenhouse warming. The larger warming asymmetry is caused by greater melting of NH sea ice in the 0.25° model, associated with faster, less viscous boundary currents transporting heat northward. The SH sea ice and heat transport response is relatively insensitive to the resolution change, since the eddy heat transport differences between the models are small compared with the mean flow heat transport. When a wind shift and intensification is applied in these warming scenarios, the warming asymmetry is further enhanced, with greater upwelling of cool water in the Southern Ocean and enhanced warming in the NH. Surface air temperatures show a substantial but lesser degree of high-latitude warming asymmetry, reflecting the sea surface warming patterns over the ocean but warming more symmetrically over the land regions. © 2015 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50367
Appears in Collections: 气候变化事实与影响
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作者单位: Climate Change Research Centre, University of New South Wales, Sydney, NSW, Australia; ARC Centre of Excellence for Climate Systems Science, Sydney, NSW, Australia; Research School of Earth Sciences, Australian National University, Canberra, ACT, Australia; ARC Centre of Excellence for Climate Systems Science, Canberra, ACT, Australia; Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden
Recommended Citation:
Hutchinson D.K.,England M.H.,Hogg A.M.,et al. Interhemispheric asymmetry of warming in an eddy-permitting coupled sector model[J]. Journal of Climate,2015-01-01,28(18)