DOI: 10.1002/2016GL070278
论文题名: Ice-flow reorganization in West Antarctica 2.5 kyr ago dated using radar-derived englacial flow velocities
作者: Kingslake J. ; Martín C. ; Arthern R.J. ; Corr H.F.J. ; King E.C.
刊名: Geophysical Research Letters
ISSN: 0094-8696
EISSN: 1944-8427
出版年: 2016
卷: 43, 期: 17 起始页码: 9103
结束页码: 9112
语种: 英语
英文关键词: field observations
; ice flow
; ice sheets
; ice-penetrating radar
; inverse methods
; past ice flow
Scopus关键词: Flow velocity
; Glaciers
; Inverse problems
; Radar
; Field observations
; Ice flow
; Ice sheet
; Inverse methods
; Penetrating radar
; Ice
; englacial process
; field method
; flow velocity
; glacial history
; Holocene
; ice flow
; ice retreat
; ice sheet
; inverse analysis
; radar
; two-dimensional flow
; Antarctica
; Southern Ocean
; Weddell Sea
; West Antarctica
英文摘要: We date a recent ice-flow reorganization of an ice divide in the Weddell Sea Sector, West Antarctica, using a novel combination of inverse methods and ice-penetrating radars. We invert for two-dimensional ice flow within an ice divide from data collected with a phase-sensitive ice-penetrating radar while accounting for the effect of firn on radar propagation and ice flow. By comparing isochronal layers simulated using radar-derived flow velocities with internal layers observed with an impulse radar, we show that the divide's internal structure is not in a steady state but underwent a disturbance, potentially implying a regional ice-flow reorganization, 2.5 (1.8–2.9) kyr B.P. Our data are consistent with slow ice flow in this location before the reorganization and the ice divide subsequently remaining stationary. These findings increase our knowledge of the glacial history of a region that lacks dated constraints on late-Holocene ice-sheet retreat and provides a key target for models that reconstruct and predict ice-sheet behavior. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84987933677&doi=10.1002%2f2016GL070278&partnerID=40&md5=1e3013e63ebe6e89c21731c6c0c620af
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9659
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Lamont-Doherty Earth Observatory, Palisades, NY, United States
Recommended Citation:
Kingslake J.,Martín C.,Arthern R.J.,et al. Ice-flow reorganization in West Antarctica 2.5 kyr ago dated using radar-derived englacial flow velocities[J]. Geophysical Research Letters,2016-01-01,43(17).