globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2674
论文题名:
Pan-Arctic ice-wedge degradation in warming permafrost and its influence on tundra hydrology
作者: Liljedahl A.K.; Boike J.; Daanen R.P.; Fedorov A.N.; Frost G.V.; Grosse G.; Hinzman L.D.; Iijma Y.; Jorgenson J.C.; Matveyeva N.; Necsoiu M.; Raynolds M.K.; Romanovsky V.E.; Schulla J.; Tape K.D.; Walker D.A.; Wilson C.J.; Yabuki H.; Zona D.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2016
卷: 9, 期:4
起始页码: 312
结束页码: 318
语种: 英语
Scopus关键词: cracking ; decadal variation ; degradation ; hydrological change ; hydrology ; ice ; melting ; permafrost ; polygon ; pond ; remote sensing ; subsidence ; temperature ; trough ; tundra ; Arctic
英文摘要: Ice wedges are common features of the subsurface in permafrost regions. They develop by repeated frost cracking and ice vein growth over hundreds to thousands of years. Ice-wedge formation causes the archetypal polygonal patterns seen in tundra across the Arctic landscape. Here we use field and remote sensing observations to document polygon succession due to ice-wedge degradation and trough development in ten Arctic localities over sub-decadal timescales. Initial thaw drains polygon centres and forms disconnected troughs that hold isolated ponds. Continued ice-wedge melting leads to increased trough connectivity and an overall draining of the landscape. We find that melting at the tops of ice wedges over recent decades and subsequent decimetre-scale ground subsidence is a widespread Arctic phenomenon. Although permafrost temperatures have been increasing gradually, we find that ice-wedge degradation is occurring on sub-decadal timescales. Our hydrological model simulations show that advanced ice-wedge degradation can significantly alter the water balance of lowland tundra by reducing inundation and increasing runoff, in particular due to changes in snow distribution as troughs form. We predict that ice-wedge degradation and the hydrological changes associated with the resulting differential ground subsidence will expand and amplify in rapidly warming permafrost regions. © 2016 Macmillan Publishers Limited. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106043
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: Water and Environmental Research Center, University of Alaska Fairbanks, 306 Tanana Loop, Fairbanks, AK, United States; Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Telegrafenberg A6, Potsdam, Germany; Department of Natural Resources, Division of Geological and Geophysical Surveys, 3354 College Road, Fairbanks, AK, United States; Melnikov Permafrost Institute, 36 Merzlotnaya Street, Yakutsk, Russian Federation; ABR, Inc., Environmental Research and Services, PO Box 80410, Fairbanks, AK, United States; Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Telegrafenberg A45, Potsdam, Germany; International Arctic Research Center, University of Alaska Fairbanks, 930 Koyukuk Drive, Fairbanks, AK, United States; Institute of Arctic Climate and Environmental Research, Japan Agency for Marine-Earth Science and Technology, 2-15 Natsushima-machi, Yokosuka-city, Kanagawa, Japan; Arctic National Wildlife Refuge, 101 12th Avenue, Fairbanks, AK, United States; Komarov Botanical Institute, Russian Academy of Sciences, Popova Street 2, St Petersburg, Russian Federation; Southwest Research Institute, Geosciences and Engineering Division, 6220 Culebra Road, San Antonio, TX, United States; Institute of Arctic Biology, University of Alaska Fairbanks, 902 North Koyukuk Drive, PO Box 757000, Fairbanks, AK, United States; Geophysical Institute, University of Alaska Fairbanks, 903 Koyukuk Drive, Fairbanks, AK, United States; Earth Cryosphere Institute, 86 Malygina Street, Tyumen, Russian Federation; Hydrology Software Consulting, Regensdorferstrasse 162, Zurich, Switzerland; Earth and Environmental Sciences Division, Los Alamos National Laboratory, MS J495, Los Alamos, NM, United States; Department of Environmental Geochemical Cycle Research, Japan Agency for Marine-Earth Science and Technology, 3173-25 Showa-machi, Kanazawa-ku, Yokohama-city, Kanagawa, Japan; Department of Biology, San Diego State University, San Diego, CA, United States; Department of Animal and Plant Sciences, University of Sheffield, Sheffield, United Kingdom

Recommended Citation:
Liljedahl A.K.,Boike J.,Daanen R.P.,et al. Pan-Arctic ice-wedge degradation in warming permafrost and its influence on tundra hydrology[J]. Nature Geoscience,2016-01-01,9(4)
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