DOI: 10.1016/j.quascirev.2013.10.022
Scopus记录号: 2-s2.0-84900450153
论文题名: Arctic Ocean perennial sea ice breakdown during the Early Holocene Insolation Maximum
作者: Stranne C. ; Jakobsson M. ; Björk G.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 92 起始页码: 123
结束页码: 132
语种: 英语
英文关键词: Albedo feedback
; Arctic climate
; Arctic sea ice
; Bølling-Allerød
; Holocene
; Milankovitch cycles
Scopus关键词: Climate models
; Computer simulation
; Glacial geology
; Incident solar radiation
; Oceanography
; Albedo feedbacks
; Arctic climate
; Arctic sea ice
; Holocenes
; Milankovitch cycle
; Sea ice
; albedo
; arctic environment
; atmosphere-ice-ocean system
; climate modeling
; glaciation
; GRIP
; Holocene
; ice breakup
; ice core
; ice cover
; insolation
; Milankovitch cycle
; paleoceanography
; paleoclimate
; sea ice
; Arctic Ocean
英文摘要: Arctic Ocean sea ice proxies generally suggest a reduction in sea ice during parts of the early and middle Holocene (~6000-10,000 years BP) compared to present day conditions. This sea ice minimum has been attributed to the northern hemisphere Early Holocene Insolation Maximum (EHIM) associated with Earth's orbital cycles. Here we investigate the transient effect of insolation variations during the final part of the last glaciation and the Holocene by means of continuous climate simulations with the coupled atmosphere-sea ice-ocean column model CCAM. We show that the increased insolation during EHIM has the potential to push the Arctic Ocean sea ice cover into a regime dominated by seasonal ice, i.e. ice free summers. The strong sea ice thickness response is caused by the positive sea ice albedo feedback. Studies of the GRIP ice cores and high latitude North Atlantic sediment cores show that the Bølling-Allerød period (c. 12,700-14,700 years BP) was a climatically unstable period in the northern high latitudes and we speculate that this instability may be linked to dual stability modes of the Arctic sea ice cover characterized by e.g. transitions between periods with and without perennial sea ice cover. © 2013 The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60303
Appears in Collections: 过去全球变化的重建
There are no files associated with this item.
作者单位: Department of Earth Sciences, University of Gothenburg, 413 20 Göteborg, Sweden; Department of Geological Sciences, Stockholm University, 106 91 Stockholm, Sweden
Recommended Citation:
Stranne C.,Jakobsson M.,Björk G.. Arctic Ocean perennial sea ice breakdown during the Early Holocene Insolation Maximum[J]. Quaternary Science Reviews,2014-01-01,92