DOI: 10.1002/2013GL058295
论文题名: Isotropic thaw subsidence in undisturbed permafrost landscapes
作者: Shiklomanov N.I. ; Streletskiy D.A. ; Little J.D. ; Nelson F.E.
刊名: Geophysical Research Letters
ISSN: 0094-8282
EISSN: 1944-8013
出版年: 2013
卷: 40, 期: 24 起始页码: 6356
结束页码: 6361
语种: 英语
英文关键词: active layer
; Alaska
; climate change
; permafrost
; thaw subsidence
Scopus关键词: Active Layer
; Alaska
; Differential global positioning systems
; Ice-rich permafrost
; Near surface air temperature
; Observation techniques
; Physiographic regions
; Vertical movement
; Climate change
; Subsidence
; Thawing
; Permafrost
; active layer
; air temperature
; arctic environment
; climate change
; GPS
; ice movement
; ice thickness
; landscape evolution
; permafrost
; subsidence
; surface area
; terrain
; thawing
; vertical movement
; Alaska
; United States
英文摘要: Observations in undisturbed terrain within some regions of the Arctic reveal limited correlation between increasing air temperature and the thickness of the seasonally thawed layer above ice-rich permafrost. Here we describe landscape-scale, thaw-induced subsidence lacking the topographic contrasts associated with thermokarst terrain. A high-resolution, 11 year record of temperature and vertical movement at the ground surface from contrasting physiographic regions of northern Alaska, obtained with differential global positioning systems technology, indicates that thaw of an ice-rich layer at the top of permafrost has produced decimeter-scale subsidence extending over the entire landscapes. Without specialized observation techniques the subsidence is not apparent to observers at the surface. This "isotropic thaw subsidence" explains the apparent stability of active layer thickness records from some landscapes of northern Alaska, despite warming near-surface air temperatures. Integrated over extensive regions, it may be responsible for thawing large volumes of carbon-rich substrate and could have negative impacts on infrastructure. ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84890398748&doi=10.1002%2f2013GL058295&partnerID=40&md5=0fff2d481a143008f3fbdcce6f1086ca
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5546
Appears in Collections: 气候减缓与适应
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作者单位: Department of Geography, George Washington University, 1922 F Street NW, Washington, DC 20052, United States
Recommended Citation:
Shiklomanov N.I.,Streletskiy D.A.,Little J.D.,et al. Isotropic thaw subsidence in undisturbed permafrost landscapes[J]. Geophysical Research Letters,2013-01-01,40(24).