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Seismic wave propagation in anisotropic ice - Part 1: Elasticity tensor and derived quantities from ice-core properties

Diez, A. 1; Eisen, O.
1 Karlsruher Institut für Technologie (KIT)


A preferred orientation of the anisotropic ice crystals influences the viscosity of the ice bulk and the dynamic behaviour of glaciers and ice sheets. Knowledge about the distribution of crystal anisotropy is mainly provided by crystal orientation fabric (COF) data from ice cores. However, the developed anisotropic fabric influences not only the flow behaviour of ice but also the propagation of seismic waves. Two effects are important: (i) sudden changes in COF lead to englacial reflections, and (ii) the anisotropic fabric induces an angle dependency on the seismic velocities and, thus, recorded travel times. A framework is presented here to connect COF data from ice cores with the elasticity tensor to determine seismic velocities and reflection coefficients for cone and girdle fabrics.We connect the microscopic anisotropy of the crystals with the macroscopic anisotropy of the ice mass, observable with seismic methods. Elasticity tensors for different fabrics are calculated and used to investigate the influence of the anisotropic ice fabric on seismic velocities and reflection coefficients, englacially as well as for the ice–bed contact. ... mehr

Volltext §
DOI: 10.5445/IR/1000058108
DOI: 10.5194/tc-9-367-2015
Zitationen: 37
Web of Science
Zitationen: 22
Zitationen: 39
Cover der Publikation
Zugehörige Institution(en) am KIT Geophysikalisches Institut (GPI)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2015
Sprache Englisch
Identifikator ISSN: 1994-0416, 1994-0424
KITopen-ID: 1000058108
Erschienen in The Cryosphere
Verlag Copernicus Publications
Band 9
Heft 1
Seiten 367-384
Nachgewiesen in Scopus
Web of Science
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