Journal Highlights

Ice fabric in an Antarctic ice stream interpreted from seismic anisotropy

Editors’ Highlight—

Large-scale ice flow models assume that ice is isotropic, but this study suggests the presence of highly anisotropic ice within a fast-flowing ice stream in West Antarctica. The authors analyzed the shear wave splitting of events generated on the bed of the ice stream. From the delay time, they derived the deviation of the shear wave velocity to the isotropic velocity, and from this they inferred that the fabric is a mix of horizontal partial girdle and cluster fabric. This anisotropic fabric type has not been observed in glaciers before. 

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