Paths forward in radioglaciology

Schroeder, Dustin M.

doi:10.1017/aog.2023.3

Cited by 4 publications

(2 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With this is mind, the framework could be applied to other regions with similar conditions to distinguish frozen and thawed bed patches, though choosing bounds for processing, labeling, and thresholding would need to be updated for the new region. The framework could also be applied to focused data (Heliere et al., 2007; Peters et al., 2007) or other types of ice penetrating radar data (Schlegel et al., 2023), or used to classify other subglacial environments including grounding zone locations or subglacial lake detection. Additionally, the framework's ability to assess uncertainty could be further exploited, either by tracing individual influences from subsampling existing surveys or adding synthetic data.…”

Section: Discussionmentioning

confidence: 99%

Heterogeneous Basal Thermal Conditions Underpinning the Adélie‐George V Coast, East Antarctica

Dawson,

Schroeder,

Chu

et al. 2024

Geophysical Research Letters

Self Cite

View full text Add to dashboard Cite

Adélie‐George V Land in East Antarctica, encompassing the vast Wilkes Subglacial Basin, has a configuration that could be prone to ice sheet instability: the basin's retrograde bed slope could make its marine terminating glaciers vulnerable to warm seawater intrusion and irreversible retreat under predicted climate forcing. However, future projections are uncertain, due in part to limited subglacial observations near the grounding zone. Here, we develop a novel statistical approach to characterize subglacial conditions from radar sounding observations. Our method reveals intermixed frozen and thawed bed within 100 km of the grounding‐zone near the Wilkes Subglacial Basin outflow, and enables comparisons to ice sheet model‐inferred thermal states. The signs of intermixed or near thawed conditions raises the possibility that changes in basal thermal state could impact the stability of Adélie‐George V Land, adding to the region's potentially vulnerable topographic configuration and sensitivity to ocean forcing driven grounding line retreat.

show abstract

Section: Discussionmentioning

confidence: 99%

Heterogeneous Basal Thermal Conditions Underpinning the Adélie‐George V Coast, East Antarctica

Dawson,

Schroeder,

Chu

et al. 2024

Geophysical Research Letters

Self Cite

View full text Add to dashboard Cite

show abstract

“…Since the early 1970s, radar echo sounding (RES) has been the primary means of measuring ice thickness, inferring thickness based on two-way travel times of transmitted radio waves reflected off the ice-bed interface. Over the past two decades, significant advances in radar technology and processing workflows for both surface and airborne surveys have revealed unprecedented detail into the morphology of Greenland's bed, though much uncertainty remains [210,211]. With the launch of NASA's Operation IceBridge (2009-2019), airborne radar coverage of Greenland increased by more than threefold, adding more…”

Section: Bed Topography and Compositionmentioning

confidence: 99%

Advances in monitoring glaciological processes in Kalallit Nunaat (Greenland) over the past decades

Fahrner,

Catania,

Shahin

et al. 2024

PLOS Clim

View full text Add to dashboard Cite

Greenland’s glaciers have been retreating, thinning and accelerating since the mid-1990s, with the mass loss from the Greenland Ice Sheet (GrIS) now being the largest contributor to global sea level rise. Monitoring changes in glacier dynamics using in-situ or remote sensing methods has been and remains therefore crucial to improve our understanding of glaciological processes and the response of glaciers to changes in climate. Over the past two decades, significant advances in technology have provided improvements in the way we observe glacier behavior and have helped to reduce uncertainties in future projections. This review focuses on advances in in-situ monitoring of glaciological processes, but also discusses novel methods in satellite remote sensing. We further highlight gaps in observing, measuring and monitoring glaciers in Greenland, which should be addressed in order to improve our understanding of glacier dynamics and to reduce in uncertainties in future sea level rise projections. In addition, we review coordination and inclusivity of science conducted in Greenland and provide suggestion that could foster increased collaboration and co-production.

show abstract

Development of a drone-based ground-penetrating radar system for efficient and safe 3D and 4D surveying of alpine glaciers

Ruols,

Baron,

Irving

2023

J. Glaciol.

View full text Add to dashboard Cite

Recent research has highlighted the potential for high-resolution, high-density, 3D and 4D ground-penetrating radar (GPR) acquisitions on alpine glaciers. When carried out on foot, such surveys are laborious and time consuming, which limits their application to small domains of limited glaciological interest. Further, crevasses and other hazards make the data acquisition risky. To address these issues, we have developed a drone-based GPR system. The system has a payload weight of 2.2 kg and a data output rate of 14 traces per second. An 80-MHz antenna and a recording time of 2800 ns mean that depths of over 100 m can be reached in temperate ice. Differential GPS positioning assures accurate flight paths. At a speed of 4 m s−1 and height of 5 m above the glacier surface, our system can acquire over 4 line-km of GPR data in 20 min on a single set of drone batteries. After presenting the technical specifications of the system and tests required to optimize its performance, we showcase a recently acquired 3D dataset from the Otemma glacier in Switzerland, where 462 parallel GPR profiles were surveyed at a 1-m line spacing, totaling over 112 line-km of data, in only 4 days.

show abstract

Paths forward in radioglaciology

Cited by 4 publications

References 52 publications

Heterogeneous Basal Thermal Conditions Underpinning the Adélie‐George V Coast, East Antarctica

Heterogeneous Basal Thermal Conditions Underpinning the Adélie‐George V Coast, East Antarctica

Advances in monitoring glaciological processes in Kalallit Nunaat (Greenland) over the past decades

Development of a drone-based ground-penetrating radar system for efficient and safe 3D and 4D surveying of alpine glaciers

Contact Info

Product

Resources

About