DOI: 10.1002/2013GL057694
论文题名: Breakup of the Larsen B Ice Shelf triggered by chain reaction drainage of supraglacial lakes
作者: Banwell A.F. ; MacAyeal D.R. ; Sergienko O.V.
刊名: Geophysical Research Letters
ISSN: 0094-8375
EISSN: 1944-8106
出版年: 2013
卷: 40, 期: 22 起始页码: 5872
结束页码: 5876
语种: 英语
英文关键词: ice shelves
; melting
; surface hydrology
; surface lakes
Scopus关键词: Flexural stress
; Fracture network
; Fracture systems
; Horizontal fractures
; Horizontal spacing
; Hydro-fracture
; Ice shelves
; Surface hydrology
; Explosives
; Fracture
; Lakes
; Melting
; Ice
; drainage
; flexure
; fracture network
; ice breakup
; ice shelf
; melting
; meltwater
; surface water
; Antarctica
; Larsen Ice Shelf
; West Antarctica
英文摘要: The explosive disintegration of the Larsen B Ice Shelf poses two unresolved questions: What process (1) set a horizontal fracture spacing sufficiently small to predispose the subsequent ice shelf fragments to capsize and (2) synchronized the widespread drainage of >2750 supraglacial meltwater lakes observed in the days prior to break up? We answer both questions through analysis of the ice shelf's elastic flexure response to the supraglacial lakes on the ice shelf prior to break up. By expanding the previously articulated role of lakes beyond mere water reservoirs supporting hydrofracture, we show that lake-induced flexural stresses produce a fracture network with appropriate horizontal spacing to induce capsize-driven breakup. The analysis of flexural stresses suggests that drainage of a single lake can cause neighboring lakes to drain, which, in turn, causes farther removed lakes to drain. Such self-stimulating behavior can account for the sudden, widespread appearance of a fracture system capable of driving explosive break up. ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84890496575&doi=10.1002%2f2013GL057694&partnerID=40&md5=1af01d4bac9c7ec842449af27cff50cc
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5639
Appears in Collections: 气候减缓与适应
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作者单位: Department of Geophysical Sciences, University of Chicago, 5734 S. Ellis Ave., Chicago, IL 60637, United States
Recommended Citation:
Banwell A.F.,MacAyeal D.R.,Sergienko O.V.. Breakup of the Larsen B Ice Shelf triggered by chain reaction drainage of supraglacial lakes[J]. Geophysical Research Letters,2013-01-01,40(22).