DOI: 10.1029/2012GL054197
论文题名: Marine ice deformation experiments: An empirical validation of creep parameters
作者: Dierckx M. ; Tison J.-L.
刊名: Geophysical Research Letters
ISSN: 0094-9403
EISSN: 1944-9134
出版年: 2013
卷: 40, 期: 1 起始页码: 134
结束页码: 138
语种: 英语
Scopus关键词: Creep parameters
; Deformation curves
; Empirical temperatures
; Empirical validation
; Experimental validations
; Rheological relationship
; Stress condition
; Uni-axial compression
; Deformation
; Experiments
; Rheology
; Salinity measurement
; Ice
; creep
; deformation mechanism
; empirical analysis
; ice mechanics
; ice shelf
; power law
; rheology
; sea ice
; viscosity
; Antarctica
英文摘要: Marine ice is increasingly recognized as an important component of ice shelves in Antarctica. Because it mainly accretes in "weak" locations, it plays a crucial role in ice shelf stability. Little is known however on the rheology of this particular material (low salinity, no bubbles, specific fabrics). We present marine ice deformation experiments in unconfined uniaxial compression at -10 °C, -6 °C, and -3 °C. Generally, marine ice samples confirm the value of n=3 for Glen's power law. It also appears to behave systematically "harder" than artificial or meteoric isotropic ice samples used in the past, in the studied stress condition. Bulk salinity does not seem to have a significant impact on the viscosity. All deformation curves compare well with a generalized empirical temperature/viscosity relationship. They represent the first experimental validation of the lower boundary of this rheological relationship recommended for use in modeling ice dynamics. © 2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84874897032&doi=10.1029%2f2012GL054197&partnerID=40&md5=f8be42a08d1b1067e14f9c908f8574fe
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6667
Appears in Collections: 气候减缓与适应
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作者单位: Laboratoire de Glaciologie, Département des Sciences de la Terre et de l'Environnement, Université Libre de Bruxelles, CP 160/03, Avenue F.D. Roosevelt 50, B-1050 Brussels, Belgium
Recommended Citation:
Dierckx M.,Tison J.-L.. Marine ice deformation experiments: An empirical validation of creep parameters[J]. Geophysical Research Letters,2013-01-01,40(1).