DOI: 10.1007/s00382-013-1811-z
Scopus记录号: 2-s2.0-84897573800
论文题名: Evaluation of pan-Arctic melt-freeze onset in CMIP5 climate models and reanalyses using surface observations
作者: Mortin J. ; Graversen R.G. ; Svensson G.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 42, 期: 2017-07-08 起始页码: 2239
结束页码: 2257
语种: 英语
英文关键词: Arctic climate change
; Arctic melt-freeze transitions
; Arctic ocean
; Climate model evaluation
; CMIP5 future projections
; Reanalysis
英文摘要: The seasonal melt-freeze transitions are fundamental features of the Arctic climate system. The representation of the pan-Arctic melt and freeze onset (north of 60°N) is assessed in two reanalyses and eleven CMIP5 global circulation models (GCMs). The seasonal melt-freeze transitions are retrieved from surface air temperature (SAT) across the land and sea-ice domains and evaluated against surface observations. While monthly averages of SAT are reasonably well represented in models, large model-observation and model-model disparities of timing of melt and freeze onset are evident. The evaluation against surface observations reveals that the ERA-Interim reanalysis performs the best, closely followed by some of the climate models. GCMs and reanalyses capture the seasonal melt-freeze transitions better in the central Arctic than in the marginal seas and across the land areas. The GCMs project that during the 21st century, the summer length-the period between melt and freeze onset-will increase over land by about 1 month at all latitudes, and over sea ice by 1 and 3 months at low and high latitudes, respectively. This larger summer-length increase over sea ice at progressively higher latitudes is related to a retreat of summer sea ice during the 21st century, since open water freezes roughly 40 days later than ice-covered ocean. As a consequence, by the year 2100, the freeze onset is projected to be initiated within roughly 10 days across the whole Arctic Ocean, whereas this transition varies by about 80 days today. © 2013 Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54610
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Meteorology and the Bolin Centre for Climate Research, Stockholm University, Svante Arrhenius Väg 16C, S-106 91 Stockholm, Sweden
Recommended Citation:
Mortin J.,Graversen R.G.,Svensson G.. Evaluation of pan-Arctic melt-freeze onset in CMIP5 climate models and reanalyses using surface observations[J]. Climate Dynamics,2014-01-01,42(2017-07-08)