DOI: 10.1175/JCLI-D-12-00546.1
Scopus记录号: 2-s2.0-84882983700
论文题名: Greenland ice sheet mass balance reconstruction. Part III: Marine ice loss and total mass balance (1840-2010)
作者: Box J.E. ; Colgan W.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 18 起始页码: 6990
结束页码: 7002
语种: 英语
Scopus关键词: Decadal timescale
; Glacier discharges
; Greenland Ice Sheet
; Marine environment
; Mass balance
; Mass budget
; Sea level rise
; Semi-empirical
; Melting
; Sea ice
; Sea level
; Glaciers
; glacier
; ice sheet
; iceberg calving
; mass balance
; meltwater
; runoff
; sea level change
; Arctic
; Greenland
; Greenland Ice Sheet
英文摘要: Greenland ice sheet mass loss to the marine environment occurs by some combination of iceberg calving and underwater melting (referred to here as marine ice loss, LM). This study quantifies the relation between LM and meltwater runoff(R) at the ice sheet scale. A theoretical basis is presented explaining how variability in R can be expected to govern much of the LM variability over annual to decadal time scales. It is found that R enhances LM through three processes: 1) increased glacier discharge by ice warming-softening and basal lubrication-sliding; 2) increased calving susceptibility through undercutting glacier front geometry and reducing ice integrity; and 3) increased underwater melting from forcing marine convection. Applying a semiempirical LM f(R) parameterization to a surfacemass balance reconstruction enables total ice sheet mass budget closure over the 1840-2010 period. The estimated cumulative 171-yr net ice sheet sea level contribution is 25±10mm, the rise punctuated by periods of ice sheet netmass gain (sea level drawdown) (1893-1900, 1938-47, and 1972-98). The sea level contribution accelerated at 27.6mmyr-1 century-1 over the entire reconstruction, reaching a peak sea level rise contribution of 6.1mmdecade-1 during 2002-10. © 2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51664
Appears in Collections: 气候变化事实与影响
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作者单位: Byrd Polar Research Center, The Ohio State University, Columbus, OH, United States; Geological Survey of Denmark and Greenland (GEUS), Copenhagen, Denmark; Cooperative Institute for Research in Environmental Sciences, Boulder, CO, United States; Geological Society of Denmark and Greenland, Copenhagen, Denmark
Recommended Citation:
Box J.E.,Colgan W.. Greenland ice sheet mass balance reconstruction. Part III: Marine ice loss and total mass balance (1840-2010)[J]. Journal of Climate,2013-01-01,26(18)