Maxwell–Wagner Relaxation in Two Desert Soils at Medium and High Water Contents: Interpretation From Modeling of Time Domain Reflectometry Data

Arcone, Steven A.; Grant, Stephanie; Boitnott, Ginger

doi:10.1109/jstars.2015.2436822

Cited by 10 publications

(1 citation statement)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Inversely, in more porous areas, the depth scale should be expanded relative to what is shown with = 3. Estimating the effect of porosity using formulation of the Complex Refractive Index Method (CRIM, Equation 1, Arcone et al, 2016), whereby…”

Section: Absence Of Interfacementioning

confidence: 99%

The response of supraglacial debris to elevated, high frequencyGPR: Volumetric scatter and interfacial dielectric contrastsinterpreted from field and experimental studies

Giese

Arcone

Hawley

et al. 2019

Preprint

View full text Add to dashboard Cite

Abstract. The thickness of supraglacial debris affects the surface energy balance and retreat patterns of mountain glaciers. Therefore, knowing a debris layer’s thickness is crucial for understanding the magnitude and timeframe of glacier melt. Field- based ground-penetrating radar (GPR) has recently gained attention as a possible method for measuring debris thickness. Airborne assessments achieve extensive coverage and characterization, but the use of GPR for such platforms remains relatively unexplored. We investigated the performance of 960 MHz and 2.6 GHz GPR signals through dry laboratory rock debris, and of 960 MHz over ∼ 2 km of transects on the debris cover of Changri Nup Glacier, Nepal Himalaya. On the glacier, 960 MHz profiles were characterized by no clear reflection from the ice interface and volumetric backscatter from within ∼ 10–40 cm, a depth that corresponds to approximate ground-truth debris thicknesses on all transects. The laboratory results show that the lack of an ice-debris interface return in field data was likely caused by a weak dielectric contrast between solid ice and porous dry debris and that surface scatter is coherent but weak. This suggests that the debris-ice interface reflection was also likely coherent, supporting our conclusion of a weak dielectric contrast. The laboratory 2.6 GHz results show significant penetration for only smaller clast sizes up to 4 cm. We used a statistical approach to estimate ice depth from volumetric scatter, which gave reasonable agreement with ground-truth depth measurements. We conclude that a remote system operating near 1 GHz could successfully estimate dry debris cover thicknesses based on depth of volumetric backscatter.

show abstract

Section: Absence Of Interfacementioning

confidence: 99%