A5040199053- Geology and Paleoclimatology Research
- Cryospheric studies and observations
- Climate change and permafrost
- Landslides and related hazards
- Winter Sports Injuries and Performance
- Methane Hydrates and Related Phenomena
- Ionosphere and magnetosphere dynamics
- Australian History and Society
- Homelessness and Social Issues
- Gambling Behavior and Treatments
- Pleistocene-Era Hominins and Archaeology
- Arctic and Antarctic ice dynamics
- Travel Writing and Literature
- Geological Studies and Exploration
Charles University
2019-2024
University of Sheffield
2021
Sheffield Hallam University
2019
The most recent deglaciation of the North American Ice Sheet Complex (NAISC: comprising Innuitian, Cordilleran, and Laurentide ice sheets) offers a broad perspective from which to analyze timing rate retreat, deglacial sea-level rise, abrupt climate change events. Previous efforts portray retreat NAISC have been focused largely on minimum-limiting radiocarbon ages margin location(s) tied landforms that were not, for part, chronologically constrained. Here, we present first version...
Abstract. Reconstructions of palaeo-ice-stream activity provide insight into the processes governing ice stream evolution over millennial timescales. The northwestern sector Laurentide Ice Sheet experienced a period rapid retreat driven by warming during Bølling–Allerød (14.7–12.9 ka) that may have contributed significantly to global mean sea level rise this time. Therefore, provides an opportunity investigate sheet dynamics phase retreat. Here, we classify coherent groups ice-flow-parallel...
Glacial landforms hold a wealth of information about the evolution large mid-latitude ice sheets during Quaternary. Streamlined subglacial lineations retain past flow, meltwater routes provide sheet hydrology, and ice-marginal that are eroded or deposited along glacier margins delineate former positions. Thus, rich landform records found on now-exposed beds ephemeral Pleistocene important archives palaeo-ice behaviour can be used to reconstruct sheets. Over few years, I have had privilege...
Eskers are useful for reconstructing meltwater drainage systems of glaciers and ice sheets. However, our process understanding eskers suffers from a disconnect between sporadic detailed morpho‐sedimentary investigations abundant large‐scale ancient esker systems, small number modern analogues where formation has been observed. This paper presents the results field high‐resolution remote sensing studies into two that have recently emerged at Hørbyebreen, Svalbard, one Breiðamerkurjökull,...
The majority of the Northwest Territories mainland Canada was covered by Laurentide Ice Sheet during Last Glacial Maximum. increasing coverage high resolution remotely sensed data provides new opportunities to map glacial geomorphology and study history this remote location. Here we present a comprehensive landforms within northern Interior Plains adjacent areas Canadian Shield, comprising around 6% bed. Twelve landform types were mapped from ArcticDEM: ice flow parallel lineations,...
Abstract The effects of recent climate change are accelerating permafrost thaw, including ice‐rich landscapes the western Canadian Arctic. However, regional drivers slope failure in hillslopes with warm, thin remain poorly understood. Repeat satellite imagery (1984–2020) indicates rapid increases retrogressive thaw slumps (RTSs) and deep‐seated landslides (DSPLs) since 2004, indicating a stability thresholds an area that otherwise appeared stable. widespread occurrence DSPL represents...
Abstract. Deglaciation of the northwestern Laurentide Ice Sheet in central Mackenzie Valley opened northern portion deglacial Ice-Free Corridor between and Cordilleran ice sheets a drainage route to Arctic Ocean. In addition, sheet saddle collapse this section has been implicated as mechanism for delivering substantial freshwater influx into Ocean on centennial timescales. However, there is little empirical data constrain deglaciation chronology where slopes were located. Here, we present 30...
Abstract. Reconstructions of palaeo-ice stream activity provide an insight into the processes governing ice evolution over millennial timescales. The northwestern sector Laurentide Ice Sheet experienced a period rapid retreat driven by warming during Bølling–Allerød (14.7 – 12.9 ka) which may have contributed significantly to global mean sea level rise this time. It therefore provides opportunity investigate sheet dynamics phase retreat. Here, we classify coherent groups flow parallel...
Eskers are useful for reconstructing meltwater drainage systems of glaciers and ice sheets. However, our process understanding eskers suffers from a disconnect between sporadic detailed morpho-sedimentary investigations abundant large-scale ancient esker systems, small number modern analogues where formation has been observed. This paper presents the results field high-resolution remote sensing studies into two that have recently emerged at Hørbyebreen, Svalbard, one Breiðamerkurjökull,...
The northwestern sector of the Laurentide Ice Sheet drained ice from Cordilleran-Laurentide saddle and Keewatin dome towards margin on arctic continental shelf during its late local Last Glacial Maximum. glacial geomorphological geological record region documents several massive palaeo-ice streams. However, deglacial dynamics this has not yet been reconstructed in detail questions remain about nature deglaciation region: Did streams operate far up-ice or were they limited to a rather narrow...
Abstract. Deglaciation of the northwestern Laurentide Ice Sheet in central Mackenzie Valley opened northern portion deglacial Ice-Free Corridor between and Cordilleran ice sheets a drainage route to Arctic Ocean. In addition, ice-sheet saddle collapse this section has been implicated as mechanism for delivering substantial freshwater influx into Ocean on centennial timescales. However, there is little empirical data constrain deglaciation chronology where slopes were located. Here, we...
During the Last Glacial Maximum, Mackenzie Mountains region was glaciated by three distinct ice sources; Laurentide Ice Sheet, Cordilleran and independent montane glaciers. Rapid sheet thinning of Laurentide-Cordilleran saddle in south this contributed to rapid sea level rise events influenced style deglaciation north. The current understanding glacial history broader has been established through mapping from aerial imagery early surveys between 1970s 2010s. central portions have not yet...