DOI: 10.5194/tc-9-179-2015
Scopus记录号: 2-s2.0-84922419618
论文题名: Simulating the Greenland ice sheet under present-day and palaeo constraints including a new discharge parameterization
作者: Calov R ; , Robinson A ; , Perrette M ; , Ganopolski A
刊名: Cryosphere
ISSN: 19940416
出版年: 2015
卷: 9, 期: 1 起始页码: 179
结束页码: 196
语种: 英语
英文关键词: discharge
; glacial hydrology
; ice flow
; ice sheet
; mass balance
; melting
; parameterization
; sea level change
; Arctic
; Greenland
; Greenland Ice Sheet
英文摘要: In this paper, we propose a new sub-grid scale parameterization for the ice discharge into the ocean through outlet glaciers and inspect the role of different observational and palaeo constraints for the choice of an optimal set of model parameters. This parameterization was introduced into the polythermal ice-sheet model SICOPOLIS, which is coupled to the regional climate model of intermediate complexity REMBO. Using the coupled model, we performed large ensemble simulations over the last two glacial cycles by varying two major parameters: a melt parameter in the surface melt scheme of REMBO and a discharge scaling parameter in our parameterization of ice discharge. Our empirical constraints are the present-day Greenland ice sheet surface elevation, the surface mass balance partition (ratio between total ice discharge and total precipitation) and the Eemian interglacial elevation drop relative to present day in the vicinity of the NEEM ice core. We show that the ice discharge parameterization enables us to simulate both the correct ice-sheet shape and mass balance partition at the same time without explicitly resolving the Greenland outlet glaciers. For model verification, we compare the simulated total and sectoral ice discharge with other estimates. For the model versions that are consistent with the range of observational and palaeo constraints, our simulated Greenland ice sheet contribution to Eemian sea-level rise relative to present-day amounts to 1.4 m on average (in the range of 0.6 and 2.5 m). © Author(s) 2015. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75346
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
There are no files associated with this item.
作者单位: Potsdam Institute for Climate Impact Research, Potsdam, Germany; Universidad Complutense Madrid, Madrid, Spain; Instituto de Geociencias, UCM, CSIC, Madrid, Spain
Recommended Citation:
Calov R,, Robinson A,, Perrette M,et al. Simulating the Greenland ice sheet under present-day and palaeo constraints including a new discharge parameterization[J]. Cryosphere,2015-01-01,9(1)