A5081389094- Cryospheric studies and observations
- Winter Sports Injuries and Performance
- Landslides and related hazards
- Seismic Waves and Analysis
- Polar Research and Ecology
- Geology and Paleoclimatology Research
- Climate change and permafrost
- Geophysical Methods and Applications
- Arctic and Antarctic ice dynamics
- Adventure Sports and Sensation Seeking
- Icing and De-icing Technologies
- Conferences and Exhibitions Management
- Geological and Geochemical Analysis
- Botany and Geology in Latin America and Caribbean
- Indigenous Studies and Ecology
- Geological and Tectonic Studies in Latin America
- Structural Health Monitoring Techniques
- Seismic Imaging and Inversion Techniques
Swansea University
2020-2025
University of Tübingen
2025
Natural Environment Research Council
2024-2025
British Antarctic Survey
2024-2025
University of Leeds
2020
Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
2019
University of Stuttgart
1995
Abstract Three holes were drilled to the bed of Rutford Ice Stream, through ice up 2154 m thick, investigate basal processes and conditions associated with fast flow glacial history West Antarctic Sheet. A narrative drilling, measuring sampling activities, as well some preliminary results initial interpretations subglacial conditions, is given. These deepest access ever using hot-water drilling method. Samples englacial sediments recovered, a number instruments installed in column bed. The...
ABSTRACT We compared elastic moduli in polar firn derived from diving wave refraction seismic velocity analysis, firn-core density measurements and microstructure modelling based on data. The data were obtained with a small electrodynamic vibrator source near Kohnen Station, East Antarctica. analysis of waves resulted velocity–depth profiles for different types (P-, SH- SV-waves). Dynamic by combining P- S-wave velocities densities measurements. structural finite-element method (FEM) was...
Abstract Microseismicity, induced by the sliding of a glacier over its bed, can be used to characterize frictional properties ice‐bed interface, which are key parameter controlling ice stream flow. We use naturally occurring seismicity monitor spatiotemporally varying bed at Rutford Ice Stream, West Antarctica. locate 230,000 micro‐earthquakes with local magnitudes from −2.0 −0.3 using 90 days recordings 35‐station seismic network located ∼40 km upstream grounding line. Events exclusively...
Basal conditions that facilitate fast ice flow are still poorly understood and their parameterization in models results high uncertainties consequent sea-level rise projections. One approach to understanding basal is through investigating the landscape of streams glaciers, which has been shaped by over underlying substrate.In this study, we map subglacial identify Rutford Ice Stream (West Antarctica) using different visualisation techniques on high-resolution 3D radar data. Our novel reveals...
Movement of glaciers over (soft) sediment beds can deform the underlying sediment, transporting it in direction glacier flow. This subglacial discharge vary spatially, leading to net erosion some areas and deposition others—stripping free while others accumulate thick deposits—thereby forming a diverse array landforms. The rules currently employed landscape evolution models lack an empirical basis, which limits their predictive capabilities. We propose new rule informed...
The near-surface stratigraphy of ice sheets provides a unique archive past specific surface mass balance (SMB), usually on the order years to millennia. In context ongoing climate change, warming atmosphere is expected increase SMB over East Antarctic plateau due enhanced snowfall. However, scarcity observational data across this vast region complicates quantification recent changes, contributing uncertainties in future sea level projections.In study, we reconstruct last millennium along...
Understanding Antarctic subglacial hydrology is crucial for assessing ice sheet dynamics and their contributions to global sea-level rise. Subglacial water modulates basal friction, influencing flow glacier stability, as shown in studies of Thwaites Glacier other West systems. Here, we present new insights into derived from geophysical observations. By integrating radar-derived bed reflectivity with topography analysis, the geometry englacial layers identify potential pathways. Our study...
Sea level rise projections for the second half of this century exhibit considerable uncertainties, which complicates implementation climate change adaptation strategies. These uncertainties stem, in part, from reliance ice-flow models on insufficiently constrained parameters such as englacial temperature and state ice-bed interface. In principle, both can be inferred radar measurements attenuation signal ice is a proxy strength basal reflection depends conditions at Here, we focus developing...
We all got to do it: pee and poo in the wilderness, far from toilet facilities. When doing fieldwork remote places, fulfilling these basic personal needs can become a challenge. Often, conversations about topics are non-existent or limited, leaving individuals feel isolated with their concerns. For women, this challenge be even greater, especially when managing menstruation environments little privacy, running water, waste disposal options. It's time break silence normalize...
Basal terraces are characteristic stepped features with steep, near-vertical walls which interspersed by smooth horizontal sections. They occur beneath many Antarctic ice shelves and their genesis has been linked to stable ocean stratification the sections ceases near where ocean-induced melt rates intensify. However, how initially form they evolve over time is poorly observed understood. Here, we present temporal changes in basal topography from densely spaced GPR profiles imaging 3D...
Basal conditions that facilitate fast ice flow are still poorly understood and their parameterization in ice‐flow models results high uncertainties consequent sea‐level rise projections. Direct observations of basal beneath modern streams limited due to the inaccessibility bed. One approach understanding is through investigating landscape glaciers, which has been shaped by over underlying substrate. Bedform variation together with properties can reveal glaciological geological present during...
Abstract. Radio-echo sounding (RES) has revealed an internal architecture within Antarctica’s ice sheets that records their depositional, deformational and melting histories. Crucially, spatially-widespread RES-imaged internal-reflecting horizons, tied to ice-core age-depth profiles, can be treated as isochrones record the structure across Antarctic sheets. These enable reconstruction of past climate ice-dynamical processes on large scales, which are complementary but more...
Abstract Basal properties beneath ice streams and glaciers are known to be a control for flow dynamics, hence knowledge of them is crucial predicting sea level due changes in glacial dynamics. properties, processes topography also drive the formation subglacial landforms. Bed Rutford Ice Stream (West Antarctica) have previously been described using seismic acoustic impedance measurements at sparse spatial coverage. Here, we derive bed 15 × 17 km grid surface radar data with coverage sampling...
Abstract Over the past 70 years, many different components of cryosphere have been imaged with a variety radar systems using increasingly sophisticated processing techniques. These use various pulse lengths, signal frequencies and, in some cases, modulated signals. The increasing diversity has created potential for confusion due to non-consistent terminology. Here we provide an overview state-of-the-science technologies and suggest simplified unified terminology by community. We recommend...
The accuracy of sea-level rise predictions is highly dependent on reliably understanding the subglacial environment beneath ice streams. Bedforms result from interaction between and its substrate, therefore have potential to shed light poorly understood basal conditions influencing dynamics. However, theoretical models bedform formation are often based observations deglaciated areas or sparsely-sampled geophysical surveys over glaciated regions. Here, we use high-resolution three-...
Earth and Space Science Open Archive This preprint has been submitted to is under consideration at Journal of Geophysical Research - Surface. ESSOAr a venue for early communication or feedback before peer review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are viewing the latest version by default [v2]Not all icequakes created equal: basal suggest diverse bed deformation mechanisms Rutford Ice Stream, West AntarcticaAuthorsSofia-KaterinaKufneriDAlex...
Earth and Space Science Open Archive This work has been accepted for publication in Journal of Geophysical Research - Surface. Version RecordESSOAr is a venue early communication or feedback before peer review. Data may be preliminary. Learn more about preprints. preprintOpen AccessYou are viewing the latest version by default [v2]Radar derived Subglacial Properties Landforms beneath Rutford Ice Stream, West AntarcticaAuthorsRebeccaSchlegeliDTaviMurrayiDAndrew MarkSmithiDAlex...
Ekström Ice Shelf is a representative ice shelf for the ice-shelf belt of Dronning Maud Land Coast in East Antarctica. It has cold ocean-cavity with moderate basal melt rates averaging a few meters per year across shelf. In spite comparatively small average rates, we find terraces ground-penetrating radar dataset revealing near-vertical walls more than 30 height. Such features have also been observed  elsewhere and linked to large localized which parts oriented...
Earth and Space Science Open Archive This preprint has been submitted to is under consideration at Journal of Geophysical Research - Surface. ESSOAr a venue for early communication or feedback before peer review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are viewing an older version [v1]Go new versionSpatial Variation in Radar-Derived Basal Properties Rutford Ice Stream, West AntarcticaAuthorsRebeccaSchlegeliDTaviMurrayiDAndrew MarkSmithiDAlex...
Earth and Space Science Open Archive This preprint has been submitted to is under consideration at Journal of Geophysical Research - Surface. ESSOAr a venue for early communication or feedback before peer review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are viewing an older version [v1]Go new versionNot all icequakes created equal: Diverse bed deformation mechanisms Rutford Ice Stream, West Antarctica, inferred from basal...