DOI: 10.1016/j.quascirev.2017.05.008
论文题名: Strong altitudinal control on the response of local glaciers to Holocene climate change in southwest Greenland
作者: Larsen N.K. ; Strunk A. ; Levy L.B. ; Olsen J. ; Bjørk A. ; Lauridsen T.L. ; Jeppesen E. ; Davidson T.A.
刊名: Quaternary Science Reviews
出版年: 2017
卷: 168 起始页码: 69
结束页码: 78
语种: 英语
英文关键词: Glacier fluctuations
; Greenland
; Holocene
; Paleoclimate
Scopus关键词: Global warming
; Ice
; Lakes
; Sea level
; Glacier fluctuations
; Global sea level rise
; Greenland
; Greenland Ice Sheet
; Holocene climate change
; Holocenes
; Paleoclimates
; Winter precipitation
; Climate change
; air temperature
; altitude
; climate variation
; glacial history
; glacier dynamics
; Holocene
; meltwater
; Neoglacial
; paleoclimate
; twenty first century
; Arctic
; Greenland
; Greenland Ice Sheet
; Kobbefjord
英文摘要: Accelerating ice loss during recent years has made the Greenland Ice Sheet one of the largest single contributors to global sea level rise, accounting for 0.5 of the total 3.2 mm yr−1. This loss is predicted to continue and will most likely increase in the future as a consequence of global warming. However, the sensitivity of glaciers and ice caps (GICs) in Greenland to prolonged warm periods is less well constrained and geological records documenting the long-term glacial history are needed to put recent observations into a broader perspective. Here we report the results from three proglacial lakes where fluctuations in local glaciers located at different altitudes in Kobbefjord, southwest Greenland have been recorded. Our results show that the lakes received meltwater from the initial deglaciation of the area ∼9.2 cal. ka BP until ∼8.7–7.9 cal. ka BP when the meltwater input ceased as the glaciers most likely disappeared. Regrowth of glaciers began again at ∼5.5 cal. ka BP at ∼1370 m a.s.l., ∼3.6 cal. ka at ∼1170 m a.s.l., and ∼1.6 cal. ka BP at ∼1000 m a.s.l., clearly reflecting strong altitudinal control of the GIC response to Neoglacial cooling. Our results highlight that GICs in Kobbefjord, southwest Greenland are primarily influenced by changes in summer air temperatures and winter precipitation and that they are facing a rapid decay that most likely will result in their disappearance within the next centuries as a consequence of global warming. If current 21st Century retreat rates continue, the GICs in the study area will be completely gone in ∼30–90 years, with the smallest GICs disappearing first. © 2017 Elsevier Ltd 资助项目: Larsen, N.K.
; Department of Geoscience, Aarhus University, Høegh Guldbergs Gade 2, Denmark
; 电子邮件: nkl@geo.au.dk
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59199
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Geoscience, Aarhus University, Høegh Guldbergs Gade 2, Aarhus C, Denmark; Centre for GeoGenetics, Natural History Museum of Denmark, University of Copenhagen, Øster Voldgade 5-7, Copenhagen K, Denmark; Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, Aarhus C, Denmark; Department of Earth System Science, University of California Irvine, United States; NASA Jet Propulsion Laboratory, Pasadena, CA, United States; Department of Bioscience, Arctic Research Centre, Aarhus University, Vejlsøvej 25, Silkeborg, Denmark
Recommended Citation:
Larsen N.K.,Strunk A.,Levy L.B.,et al. Strong altitudinal control on the response of local glaciers to Holocene climate change in southwest Greenland[J]. Quaternary Science Reviews,2017-01-01,168