DOI: 10.1007/s00382-016-3047-1
Scopus记录号: 2-s2.0-84960366058
论文题名: Interannual variability of the Arctic freshwater cycle in the second half of the twentieth century in a regionally coupled climate model
作者: Niederdrenk A.L. ; Sein D.V. ; Mikolajewicz U.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2016
卷: 47, 期: 12 起始页码: 3883
结束页码: 3900
语种: 英语
英文关键词: Arctic freshwater cycle
; Regionally coupled climate model
; River runoff variability
英文摘要: We use a regionally coupled ocean-sea ice-atmosphere-hydrological discharge model to investigate the influence of changes in the atmospheric large-scale circulation on the interannual variability of the Arctic freshwater (FW) components. This model includes all sinks and sources of FW and allows for the analysis of a closed FW cycle in the Arctic. We show that few atmospheric winter modes explain large parts of the interannual variability of the Arctic FW cycle. A strong Icelandic low causing anomalous strong westerlies over the North Atlantic leads to warmer and wetter conditions over Eurasia. The ocean circulation is then characterized by a strong transpolar drift leading to increased export of FW in liquid and solid form into the North Atlantic. In contrast to this, a weaker than usual Icelandic low and a strong Siberian high is associated with a strong Beaufort Gyre and thus an accumulation of FW within the Arctic Ocean. Not only specific winter conditions but also increased precipitation in late spring and summer, caused by enhanced cyclone activity over land, lead to increased Eurasian runoff, which is responsible for most of the variability in Arctic river runoff. © 2016, The Author(s). 资助项目: MPG, Max-Planck-Gesellschaft
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53451
Appears in Collections: 过去全球变化的重建
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作者单位: Max Planck Institute for Meteorology, Bundesstrasse 53, Hamburg, Germany; Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Am Handelshafen 12, Bremerhaven, Germany; P.P. Shirshov Institute of Oceanology, Russian Academy of Sciences, 30, 1 Limiya, St.-Petersburg, Russian Federation
Recommended Citation:
Niederdrenk A.L.,Sein D.V.,Mikolajewicz U.. Interannual variability of the Arctic freshwater cycle in the second half of the twentieth century in a regionally coupled climate model[J]. Climate Dynamics,2016-01-01,47(12)