globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo1898
论文题名:
Heat flux variations beneath central Greenland's ice due to anomalously thin lithosphere
作者: Petrunin A.G.; Rogozhina I.; Vaughan A.P.M.; Kukkonen I.T.; Kaban M.K.; Koulakov I.; Thomas M.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2013
卷: 6, 期:9
起始页码: 746
结束页码: 750
语种: 英语
Scopus关键词: basal ice ; basal melting ; crustal structure ; crustal thinning ; deep drilling ; geothermal energy ; heat flow ; heat flux ; ice sheet ; lithosphere ; Proterozoic ; reconstruction ; thermal structure ; upper crust ; Arctic ; Greenland ; Greenland Ice Sheet ; Calluna vulgaris
英文摘要: At the Earth's surface, heat fluxes from the interior are generally insignificant compared with those from the Sun and atmosphere, except in areas permanently blanketed by ice. Modelling studies show that geothermal heat flux influences the internal thermal structure of ice sheets and the distribution of basal melt water, and it should be taken into account in planning deep ice drilling campaigns and climate reconstructions. Here we use a coupled ice-lithosphere model driven by climate and show that the oldest and thickest part of the Greenland Ice Sheet is strongly influenced by heat flow from the deep Earth. We find that the geothermal heat flux in central Greenland increases from west to east due to thinning of the lithosphere, which is only about 25-66% as thick as is typical for terrains of early Proterozoic age. Complex interactions between geothermal heat flow and glaciation-induced thermal perturbations in the upper crust over glacial cycles lead to strong regional variations in basal ice conditions, with areas of rapid basal melting adjoining areas of extremely cold basal ice. Our findings demonstrate the role that the structure of the solid Earth plays in the dynamics of surface processes. © 2013 Macmillan Publishers Limited. All rights reserved.
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被引频次[WOS]:43   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106718
Appears in Collections:气候减缓与适应
科学计划与规划

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作者单位: Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Section 1.3: Earth System Modelling, Telegrafenberg A20, D-14473 Potsdam, Germany; Schmidt Institute of Physics of the Earth, B. Gruzinskaya 10, 123995 Moscow, Russian Federation; Trinity College Dublin, College Green, Dublin 2, Ireland; British Antarctic Survey, Environmental Change and Evolution, High Cross, Madingley Road, Cambridge CB3 0ET, United Kingdom; Geological Survey of Finland (GTK), Betonimiehenkuja 4, 02150 Espoo, Finland; Institute of Petroleum Geology and Geophysics, SB RAS, Novosibirsk, 3, Prospekt Koptyuga, 630090 Novosibirsk, Russian Federation; Berlin Free University, Institute of Meteorology, Faculty of Geosciences, Carl-Heinrich-Becker-Weg 6-10, 12165 Berlin, Germany; Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Section 2.5: Geodynamic Modelling, Telegrafenberg A20, D-14473 Potsdam, Germany

Recommended Citation:
Petrunin A.G.,Rogozhina I.,Vaughan A.P.M.,et al. Heat flux variations beneath central Greenland's ice due to anomalously thin lithosphere[J]. Nature Geoscience,2013-01-01,6(9)
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