DOI: 10.1016/j.quascirev.2016.09.030
论文题名: Early Holocene deglaciation of Drangajökull, Vestfirðir, Iceland
作者: Harning D.J. ; Geirsdóttir Á. ; Miller G.H. ; Zalzal K.
刊名: Quaternary Science Reviews
出版年: 2016
卷: 153 起始页码: 192
结束页码: 198
语种: 英语
英文关键词: Deglaciation
; Drangajökull
; Iceland
; Threshold lakes
Scopus关键词: Catchments
; Lakes
; Sediments
; Snow
; Biological productivity
; Deglaciations
; Early Holocene
; Holocene thermal maximums
; Icelands
; Last glacial period
; Natural climate variabilities
; North Atlantic
; Ice
; biological production
; core analysis
; deglaciation
; glacial lake
; Holocene
; ice cap
; lacustrine deposit
; Last Glacial
; paleoclimate
; summer
; threshold
; Atlantic Ocean
; Atlantic Ocean (North)
; Drangajokull
; Iceland
; Vestfirdir
英文摘要: The status of Icelandic ice caps during the early Holocene provides important constraints on North Atlantic climate and the mechanisms behind natural climate variability. A recent study postulates that Drangajökull on Vestfirðir, Iceland, persisted through the Holocene Thermal Maximum (HTM, 7.9–5.5 ka) and may be a relic from the last glacial period. We test this hypothesis with a suite of sediment cores from threshold lakes both proximal and distal to the ice cap's modern margin. Distal lakes document rapid early Holocene deglaciation from the coast and across the highlands south of the glacier. Sediment from Skorarvatn, a lake to the north of Drangajökull, shows that the northern margin of the ice cap reached a size comparable to its contemporary limit by ∼10.3 ka. Two southeastern lakes with catchments extending well beneath modern Drangajökull confirm that by ∼9.2 ka, the ice cap was reduced to ∼20% of its current area. A continuous 10.3ka record of biological productivity from Skorarvatn's sediment indicates local peak warmth occurred between 9 and 6.9 ka. The combination of warm and dry summers on Vestfirðir suggests that Drangajökull very likely melted completely shortly after 9.2 ka, similar to most other Icelandic ice caps. © 2016 Elsevier Ltd 资助项目: Harning, D.J.
; Faculty of Earth Sciences, University of IcelandIceland
; 电子邮件: David.Harning@colorado.edu
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59385
Appears in Collections: 过去全球变化的重建
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作者单位: Faculty of Earth Sciences, University of Iceland, Reykjavík, Iceland; INSTAAR and Department of Geological Sciences, University of Colorado Boulder, Boulder, CO, United States
Recommended Citation:
Harning D.J.,Geirsdóttir Á.,Miller G.H.,et al. Early Holocene deglaciation of Drangajökull, Vestfirðir, Iceland[J]. Quaternary Science Reviews,2016-01-01,153