Статья

Dielectric Permittivity of Glacier Ice Measured In Situ by Radar Wide-Angle Reflection

Kenneth C. JezekGeophysical and Polar Research Center, University of Wisconsin, Madison, Wisconsin 53706, U.S.AJohn W. CloughRISP Management Office, University of Nebraska—Lincoln, 135 Bancroft Hall, Lincoln Nebraska 68588, U.S.ACharles R. BentleyGeophysical and Polar Research Center, University of Wisconsin, Madison, Wisconsin 53706, U.S.ASion ShabtaieGeophysical and Polar Research Center, University of Wisconsin, Madison, Wisconsin 53706, U.S.A

1978en

ABI

Аннотация

Abstract Values of relative permittivity measured by the wide-angle reflection technique on the Ross ice Shelf show substantial variations between sites, from 3.09 to 2.89, with estimated errors of ±0.03. The largest values, closest to those normally measured in the laboratory, are found nearest to the grounded ice sheet; values decrease generally in the direction of thinner ice that has been longer on the ice shelf. We believe the variation reflects some real physical phenomenon in the ice shelf, either a true variation in the permittivity of the ice or a complication of the ray-path geometry, but are not able to offer a satisfactory model at present. We hope an explanation will be forthcoming when actual ice core samples from the deep shelf ice are available for examination.

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Идентификаторы

DOI: 10.1017/s0022143000033505

Цитирования и источники

Цитирований: 2Использованных источников: 0

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