English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

. We have examined a general expression giving the specularreflection coefficient for a radar wave approaching a reflecting interfacewith normal incidence. The reflecting interface separates two homogeneousisotropic media, the properties of which are fully described by three scalarquantities: dielectric permittivity, magnetic permeability, and electricalconductivity. The derived relationship indicates that electricalconductivity should not be neglected a priori in glaciological investigations ofsubglacial materials and in ground-penetrating radar (GPR) studies of saturated sediments and bedrock,even at the high end of typical linear radar frequencies used in suchinvestigations (e.g., 100–400 MHz). Our own experience in resistivitysurveying in Antarctica, combined with a literature review, suggests that awide range of geologic materials can have electrical conductivity that ishigh enough to significantly impact the value of radar reflectivity.Furthermore, we have given two examples of prior studies in which inclusionof electrical conductivity in calculation of the radar bed reflectivity mayprovide an explanation for results that may be considered surprising if theimpact of electrical conductivity on radar reflection is neglected. Thecommonly made assumption that only dielectric permittivity of the two medianeeds to be considered in interpretation of radar reflectivity can lead toerroneous conclusions.

The role of electrical conductivity in radar wave reflection from glacier beds