DOI: 10.1007/s00382-011-1199-6
Scopus记录号: 2-s2.0-84863002601
论文题名: The freshwater balance of polar regions in transient simulations from 1500 to 2100 AD using a comprehensive coupled climate model
作者: Lehner F. ; Raible C.C. ; Hofer D. ; Stocker T.F.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2012
卷: 39, 期: 2017-01-02 起始页码: 347
结束页码: 363
语种: 英语
英文关键词: External forcing
; Freshwater balance
; Hydrological cycle
; Little Ice Age
; Polar climate
英文摘要: The ocean and sea ice in both polar regions are important reservoirs of freshwater within the climate system. While the response of these reservoirs to future climate change has been studied intensively, the sensitivity of the polar freshwater balance to natural forcing variations during preindustrial times has received less attention. Using an ensemble of transient simulations from 1500 to 2100 AD we put present-day and future states of the polar freshwater balance in the context of low frequency variability of the past five centuries. This is done by focusing on different multi-decadal periods of characteristic external forcing. In the Arctic, freshwater is shifted from the ocean to sea ice during the Maunder Minimum while the total amount of freshwater within the Arctic domain remains unchanged. In contrast, the subsequent Dalton Minimum does not leave an imprint on the slow-reacting reservoirs of the ocean and sea ice, but triggers a drop in the import of freshwater through the atmosphere. During the twentieth and twenty-first century the build-up of freshwater in the Arctic Ocean leads to a strengthening of the liquid export. The Arctic freshwater balance is shifted towards being a large source of freshwater to the North Atlantic ocean. The Antarctic freshwater cycle, on the other hand, appears to be insensitive to preindustrial variations in external forcing. In line with the rising temperature during the industrial era the freshwater budget becomes increasingly unbalanced and strengthens the high latitude's Southern Ocean as a source of liquid freshwater to lower latitude oceans. © 2011 The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/55260
Appears in Collections: 过去全球变化的重建
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作者单位: Climate and Environmental Physics, Physics Institute, Oeschger Centre for Climate Change Research, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland
Recommended Citation:
Lehner F.,Raible C.C.,Hofer D.,et al. The freshwater balance of polar regions in transient simulations from 1500 to 2100 AD using a comprehensive coupled climate model[J]. Climate Dynamics,2012-01-01,39(2017-01-02)