DOI: 10.5194/cp-10-1817-2014
Scopus记录号: 2-s2.0-84908028472
论文题名: Coupled ice sheet-climate modeling under glacial and pre-industrial boundary conditions
作者: Ziemen F.A. ; Rodehacke C.B. ; Mikolajewicz U.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2014
卷: 10, 期: 5 起始页码: 1817
结束页码: 1836
语种: 英语
Scopus关键词: boundary condition
; climate modeling
; deep water formation
; ice sheet
; ice stream
; Last Glacial Maximum
; Northern Hemisphere
; paleoclimate
; sea ice
; Canada
; Hudson Strait
英文摘要: In the standard Paleoclimate Modelling Intercomparison Project (PMIP) experiments, the Last Glacial Maximum (LGM) is modeled in quasi-equilibrium with atmosphere-ocean-vegetation general circulation models (AOVGCMs) with prescribed ice sheets. This can lead to inconsistencies between the modeled climate and ice sheets. One way to avoid this problem would be to model the ice sheets explicitly. Here, we present the first results from coupled ice sheet-climate simulations for the pre-industrial times and the LGM. Our setup consists of the AOVGCM ECHAM5/MPIOM/LPJ bidirectionally coupled with the Parallel Ice Sheet Model (PISM) covering the Northern Hemisphere. The results of the pre-industrial and LGM simulations agree reasonably well with reconstructions and observations. This shows that the model system adequately represents large, non-linear climate perturbations. A large part of the drainage of the ice sheets occurs in ice streams. Most modeled ice stream systems show recurring surges as internal oscillations. The Hudson Strait Ice Stream surges with an ice volume equivalent to about 5 m sea level and a recurrence interval of about 7000 yr. This is in agreement with basic expectations for Heinrich events. Under LGM boundary conditions, different ice sheet configurations imply different locations of deep water formation. © 2014 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49217
Appears in Collections: 气候变化与战略
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Recommended Citation:
Ziemen F.A.,Rodehacke C.B.,Mikolajewicz U.. Coupled ice sheet-climate modeling under glacial and pre-industrial boundary conditions[J]. Climate of the Past,2014-01-01,10(5)