Abstract
Abstract. Ground Penetrating Radar (GPR) survey was carried out to estimate the ice thickness and mapping the bedrock topography at Znosko glacier on King George Island, Antarctic Peninsula during 25th Peruvian Antarctic Expedition (2018). GPR surveying did at 5.2 MHz frequency with a 16 m antenna gap (transmitter and receiver). The mean ice thickness profiles vary from 7 to 123 m across the 350 m profile length. This high-resolution survey also identified a different type of ices and glaciological features which will help in modelling the nature of the glaciers in the future.
Highlights
Around 71% of the earth’s water stored in oceans and glaciers
Ground Penetrating Radar (GPR) sections at Znosko Glacier show the ice thickness distribution varies at different parts in the tongue of the glacier
GPR is a non-destructive technique with the potential to estimate the ice thickness directly and identify englacial subsurface features
Summary
Around 71% of the earth’s water stored in oceans and glaciers. Polar regions (Antarctic and Arctic) are crucial for regulating the world climate, but they are vulnerable to the impacts of global warming (Teleti, Luis, 2013). Knowledge on ice volume and ice thickness distribution are essential parameters for glaciological applications especially for simulate glacier dynamics (Farinotti et al, 2009) and may provide information to understand the effect of global warming (Singh et al, 2011; Farinotti et al, 2019). Ground Penetrating Radar (GPR) is a non-destructive technique, based on the propagation and reflection of electromagnetic waves to acquire information from the subsurface materials (air, water, sediment, ice) and the interfaces between them (Gärtner-Roer et al, 2014; Oberreuter et al, 2014, Singh et al, 2011). Preliminary results of the GPR survey carried out to estimate the ice thickness at Znosko glacier on King George Island, Antarctic Peninsula reported.
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