DOI: 10.1038/ngeo1829
论文题名: Contribution of ice sheet and mountain glacier melt to recent sea level rise
作者: Chen J.L. ; Wilson C.R. ; Tapley B.D.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2013
卷: 6, 期: 7 起始页码: 549
结束页码: 552
语种: 英语
Scopus关键词: Argo
; GRACE
; ice sheet
; satellite altimetry
; satellite data
; sea level change
; sea surface salinity
; sea surface temperature
; spatiotemporal analysis
英文摘要: Changes in global mean sea level primarily reflect the sum of three contributions: water mass changes in the oceans, water density changes, and variations in the volume of the ocean basins. Satellite altimetry data suggest that sea level rose by about 2.39±0.48 mm yr-1 between 2005 and 2011. However, previous estimates of sea level rise from density and ocean mass changes were lower than the altimeter data indicate. Here we show that the gap in the sea level budget disappears when we combine gravity data from the GRACE (Gravity Recovery and Climate Experiment) satellite mission and temperature and salinity observations from the Argo programme collected between 2005 and 2011. The Argo data indicate a density-driven sea level rise of 0.60±0.27 mm yr-1 throughout this period. To estimate ocean mass change from the gravity data, we developed a forward modelling technique that reduces the bleeding of terrestrial signals into the ocean data. Our reassessment suggests an ocean mass contribution of 1.80±0.47 mm yr-1, for a total sea level rise of 2.40±0.54 mm yr-1, in agreement with the altimeter-based estimates. On the basis of the GRACE data, we conclude that most of the change in ocean mass is caused by the melting of polar ice sheets and mountain glaciers. This contribution of ice melt is larger than previous estimates, but agrees with reports of accelerated ice melt in recent years. © 2013 Macmillan Publishers Limited. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106745
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: Center for Space Research, University of Texas, Austin, 78759, United States; Department of Geological Sciences, Jackson School of Geosciences, University of Texas, Austin 78712, United States
Recommended Citation:
Chen J.L.,Wilson C.R.,Tapley B.D.. Contribution of ice sheet and mountain glacier melt to recent sea level rise[J]. Nature Geoscience,2013-01-01,6(7)