DOI: 10.1038/ngeo2489
论文题名: Increased Arctic sea ice volume after anomalously low melting in 2013
作者: Tilling R.L. ; Ridout A. ; Shepherd A. ; Wingham D.J.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2015
卷: 8, 期: 8 起始页码: 643
结束页码: 646
语种: 英语
Scopus关键词: assessment method
; atmospheric circulation
; CryoSat
; heat budget
; melting
; Northern Hemisphere
; sea ice
; volume
; Arctic
; Arctic Ocean
; Greenland
英文摘要: Changes in Arctic sea ice volume affect regional heat and freshwater budgets and patterns of atmospheric circulation at lower latitudes. Despite a well-documented decline in summer Arctic sea ice extent by about 40% since the late 1970s, it has been difficult to quantify trends in sea ice volume because detailed thickness observations have been lacking. Here we present an assessment of the changes in Northern Hemisphere sea ice thickness and volume using five years of CryoSat-2 measurements. Between autumn 2010 and 2012, there was a 14% reduction in Arctic sea ice volume, in keeping with the long-term decline in extent. However, we observe 33% and 25% more ice in autumn 2013 and 2014, respectively, relative to the 2010-2012 seasonal mean, which offset earlier losses. This increase was caused by the retention of thick sea ice northwest of Greenland during 2013 which, in turn, was associated with a 5% drop in the number of days on which melting occurred - conditions more typical of the late 1990s. In contrast, springtime Arctic sea ice volume has remained stable. The sharp increase in sea ice volume after just one cool summer suggests that Arctic sea ice may be more resilient than has been previously considered. © 2015 Macmillan Publishers Limited. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106248
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: Centre for Polar Observation and Modelling, Department of Earth Sciences, University College London, Gower Street, London, United Kingdom; Centre for Polar Observation and Modelling, School of Earth and Environment, University of Leeds, Woodhouse Lane, Leeds, United Kingdom
Recommended Citation:
Tilling R.L.,Ridout A.,Shepherd A.,et al. Increased Arctic sea ice volume after anomalously low melting in 2013[J]. Nature Geoscience,2015-01-01,8(8)