DOI: 10.1002/2017JC013605
Scopus记录号: 2-s2.0-85043351960
论文题名: Land Ice Freshwater Budget of the Arctic and North Atlantic Oceans: 1. Data, Methods, and Results
作者: Bamber J.L. ; Tedstone A.J. ; King M.D. ; Howat I.M. ; Enderlin E.M. ; van den Broeke M.R. ; Noel B.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 3 起始页码: 1827
结束页码: 1837
语种: 英语
英文关键词: Arctic
; freshwater budget
; North Atlantic
Scopus关键词: biogeochemistry
; climate modeling
; coastal water
; convection
; fjord
; freshwater ecosystem
; glacier flow
; melting
; regional climate
; satellite data
; sea ice
; seasonal variation
; water flux
; Arctic
; Arctic Ocean
; Atlantic Ocean
; Atlantic Ocean (North)
; Baffin Bay [Arctic Ocean]
; Davis Strait
; Greenland
; Greenland Ice Sheet
英文摘要: The freshwater budget of the Arctic and sub-polar North Atlantic Oceans has been changing due, primarily, to increased river runoff, declining sea ice and enhanced melting of Arctic land ice. Since the mid-1990s this latter component has experienced a pronounced increase. We use a combination of satellite observations of glacier flow speed and regional climate modeling to reconstruct the land ice freshwater flux from the Greenland ice sheet and Arctic glaciers and ice caps for the period 1958–2016. The cumulative freshwater flux anomaly exceeded 6,300 ± 316 km3 by 2016. This is roughly twice the estimate of a previous analysis that did not include glaciers and ice caps outside of Greenland and which extended only to 2010. From 2010 onward, the total freshwater flux is about 1,300 km3/yr, equivalent to 0.04 Sv, which is roughly 40% of the estimated total runoff to the Arctic for the same time period. Not all of this flux will reach areas of deep convection or Arctic and Sub-Arctic seas. We note, however, that the largest freshwater flux anomalies, grouped by ocean basin, are located in Baffin Bay and Davis Strait. The land ice freshwater flux displays a strong seasonal cycle with summer time values typically around five times larger than the annual mean. This will be important for understanding the impact of these fluxes on fjord circulation, stratification, and the biogeochemistry of, and nutrient delivery to, coastal waters. © 2018. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114364
Appears in Collections: 气候减缓与适应
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作者单位: School of Geographical Sciences, University of Bristol, Bristol, United Kingdom; Byrd Polar Research Center, Ohio State University, Columbus, OH, United States; School of Earth and Climate Sciences, University of Maine, Orono, ME, United States; Institute for Marine and Atmospheric Research, Utrecht University, Utrecht, Netherlands
Recommended Citation:
Bamber J.L.,Tedstone A.J.,King M.D.,et al. Land Ice Freshwater Budget of the Arctic and North Atlantic Oceans: 1. Data, Methods, and Results[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(3)