DOI: 10.1002/2013GL058486
论文题名: Last Glacial Maximum ice sheet impacts on North Atlantic climate variability: The importance of the sea ice lid
作者: Vettoretti G. ; Peltier W.R.
刊名: Geophysical Research Letters
ISSN: 0094-8286
EISSN: 1944-8017
出版年: 2013
卷: 40, 期: 24 起始页码: 6378
结束页码: 6383
语种: 英语
英文关键词: glacial
; modeling
; paleoclimate
Scopus关键词: Atlantic meridional overturning circulations
; glacial
; Ice sheet reconstruction
; Interannual variability
; Laurentide ice sheets
; Paleoclimate modelling
; Paleoclimates
; Sea ice concentration
; Climatology
; Experiments
; Glacial geology
; Glaciers
; Models
; Repair
; Sea ice
; annual variation
; climate modeling
; climate variation
; glacial-interglacial cycle
; ice cover
; Last Glacial Maximum
; Laurentide Ice Sheet
; meridional circulation
; overturn
; paleoclimate
; polar region
; reconstruction
; sea ice
; Atlantic Ocean
; Atlantic Ocean (North)
英文摘要: Last Glacial Maximum (LGM) ICE-5G (VM2), ICE-6G (VM5a), and Paleoclimate Modelling Intercomparison Project Phase 3 ice sheet reconstructions are employed in high-resolution coupled climate model simulations to investigate the changes they induce in North Atlantic climate variability. An initial ICE-5G (VM2) experiment develops a rapid increase of sea ice extent once a thermal threshold is exceeded in this multimillennial simulation. Subpolar sea ice concentration and thickness are found to be strongly impacted by topographically induced downstream thermal effects from the Laurentide Ice Sheet in each of the reconstructions. However, in the two additional LGM perturbation experiments, the modeled changes in sea ice area are sufficiently similar to the LGM ICE-5G (VM2) experiment to lead to an equilibrium Atlantic Meridional Overturning Circulation strength that is also reduced by the same ~40% from preindustrial even though we find significant variation among the models in the deep convection regions of the subpolar glacial North Atlantic. Model-predicted sea ice concentrations in this critical region exceed those based upon multiproxy reconstructions, and we trace these significant differences to the intensity of the interannual variability of sea ice cover predictions. ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84890915128&doi=10.1002%2f2013GL058486&partnerID=40&md5=c9eef897f599edb7670995308d15d8a9
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5550
Appears in Collections: 气候减缓与适应
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作者单位: Department of Physics, University of Toronto, 60 St. George St., Toronto, ON M5R 3B9, Canada
Recommended Citation:
Vettoretti G.,Peltier W.R.. Last Glacial Maximum ice sheet impacts on North Atlantic climate variability: The importance of the sea ice lid[J]. Geophysical Research Letters,2013-01-01,40(24).