globalchange  > 气候减缓与适应
DOI: 10.1016/j.quascirev.2018.06.018
Scopus记录号: 2-s2.0-85048882783
论文题名:
Holocene history of the Helheim Glacier, southeast Greenland
作者: Bjørk A.A.; Larsen N.K.; Olsen J.; Goldsack A.E.; Kjeldsen K.K.; Morlighem M.; Andresen C.S.; Rasmussen P.; Oxfeldt G.; Kjær K.H.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 193
起始页码: 145
结束页码: 158
语种: 英语
Scopus关键词: Glacial geology ; Lakes ; Deglaciations ; Glacial meltwater ; Greenland Ice Sheet ; Holocenes ; Last deglaciation ; Little Ice Age ; Mass balance ; Southeast Greenland ; Ice ; deglaciation ; Holocene ; ice margin ; ice retreat ; Little Ice Age ; mass balance ; meltwater ; threshold ; Arctic ; Greenland ; Greenland Ice Sheet ; Helheim Glacier
英文摘要: Helheim Glacier ranks among the fastest flowing and most ice discharging outlets of the Greenland Ice Sheet (GrIS). After undergoing rapid speed-up in the early 2000s, understanding its long-term mass balance and dynamic has become increasingly important. Here, we present the first record of direct Holocene ice-marginal changes of the Helheim Glacier following the initial deglaciation. By analysing cores from lakes adjacent to the present ice margin, we pinpoint periods of advance and retreat. We target threshold lakes, which receive glacial meltwater only when the margin is at an advanced position, similar to the present. We show that, during the period from 10.5 to 9.6 cal ka BP, the extent of Helheim Glacier was similar to that of todays, after which it remained retracted for most of the Holocene until a re-advance caused it to reach its present extent at c. 0.3 cal ka BP, during the Little Ice Age (LIA). Thus, Helheim Glacier's present extent is the largest since the last deglaciation, and its Holocene history shows that it is capable of recovering after several millennia of warming and retreat. Furthermore, the absence of advances beyond the present-day position during for example the 9.3 and 8.2 ka cold events as well as the early-Neoglacial suggest a substantial retreat during most of the Holocene. © 2018 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112119
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作者单位: Centre for GeoGenetics, Natural History Museum of Denmark, University of Copenhagen, Øster Voldgade 5-7, Copenhagen K, 1350, Denmark; University of California, Irvine, Department of Earth System Science, United States; Department of Geoscience, Aarhus University, Aarhus, Denmark; Aarhus AMS Centre (AARAMS), Department of Physics and Astronomy, Aarhus University, Denmark; College of Science, Swansea University, United Kingdom; DTU –Space, Technical University of Denmark, Denmark; Geological Survey of Denmark and Greenland (GEUS), Copenhagen, Denmark; Environmental Archaeology and Materials Science Unit, The National Museum of Denmark, Denmark

Recommended Citation:
Bjørk A.A.,Larsen N.K.,Olsen J.,et al. Holocene history of the Helheim Glacier, southeast Greenland[J]. Quaternary Science Reviews,2018-01-01,193
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