A5032728653- Geology and Paleoclimatology Research
- Cryospheric studies and observations
- Climate change and permafrost
- Landslides and related hazards
- Geological formations and processes
- Pleistocene-Era Hominins and Archaeology
- Polar Research and Ecology
- Methane Hydrates and Related Phenomena
- Geological Studies and Exploration
- earthquake and tectonic studies
- Geological and Geochemical Analysis
- Winter Sports Injuries and Performance
- Geochemistry and Geologic Mapping
- Paleontology and Stratigraphy of Fossils
- Scientific Research and Discoveries
- Tree-ring climate responses
- Marine and environmental studies
- Hydrocarbon exploration and reservoir analysis
- Geological Modeling and Analysis
- Geological Formations and Processes Exploration
- Remote Sensing and Land Use
- Geotechnical and Geomechanical Engineering
- Radioactive contamination and transfer
- Arctic and Antarctic ice dynamics
- Science and Climate Studies
Stockholm University
2014-2024
Bolin Centre for Climate Research
2014-2024
University of Glasgow
2007-2010
Utrecht University
1989
To provide a new reconstruction of the deglaciation Fennoscandian Ice Sheet, in form calendar-year time-slices, which are particularly useful for ice sheet modelling, we have compiled and synthesized published geomorphological data eskers, ice-marginal formations, lineations, marginal meltwater channels, striae, ice-dammed lakes, geochronological from radiocarbon, varve, optically-stimulated luminescence, cosmogenic nuclide dating. This is summarized as map Sheet with isochrons marking every...
The Eurasian ice sheet complex (EISC) was the third largest mass during Last Glacial Maximum with a span of over 4500 km and responsible for around 20 m eustatic sea-level lowering. Whilst recent terrestrial marine empirical insights have improved understanding chronology, pattern rates retreat this vast sheet, concerted attempt to model deglaciation EISC honouring these new constraints is conspicuously lacking. Here, we apply first-order, thermomechanical model, validated against diverse...
The Eurasian ice-sheet complex (EISC) was the third largest ice mass during Last Glacial Maximum (LGM), after Antarctic and North American sheets. Despite its global significance, a comprehensive account of evolution from independent nucleation centres to maximum extent is conspicuously lacking. Here, first-order, thermomechanical model, robustly constrained by empirical evidence, used investigate dynamics EISC throughout build-up configuration. flow model coupled reference climate applied...
Abstract The evolution of ice-sheet configuration and flow pattern in Fennoscandia through the last glacial cycle was reconstructed using a geological inversion model, i.e. theoretical model that formalises procedure landform record to reconstruct ice sheets. uses mapped traces deglacial melt-water landforms, as well relative chronologies derived from cross-cutting striae till lineations, input data. Flow-trace systems were classified into four types: (i) time-transgressive wet-bed fans,...
Abstract Between 3 June 1982 and 8 July 1985, a stake net consisting of up to 32 stakes covering the greater part Storglaciären was surveyed 70 times, yielding roughly 2000 separate determinations vertical horizontal velocity. The time interval between surveys averaged about 1 week during summer 2 months winter. Horizontal velocities were normally highest periods high daily temperature or heavy rain early in melt season. Comparable sometimes higher temperatures rainfalls later season usually...
Disappearance of an ice sheet The Cordilleran Ice Sheet is thought to have covered westernmost Canada until about 13,000 years ago, even though the warming and sea level rise last deglaciation had begun more than a thousand earlier. This out-of-phase behavior has puzzled glaciologists because it not clear what mechanisms could account for it. Menounos et al. report measurements ages cirque valley glaciers that show much western was ice-free as early 14,000 ago—a finding better agrees with...
The timing of past glaciation across the Tian Shan provides a proxy for climate change in this critical area. Correlating glacial stages region is difficult but cosmogenic exposure ages have considerable potential. A drawback large observed scatter 10Be surface data. To quantify robustness dating, we compile, recalculate, and perform statistical analyses on sets from 25 moraines, consisting 114 new previously published ages. We assess boulder age by dividing groups into quality classes...
Abstract Ice can sculpt extraordinary landscapes, yet the efficacy of, and controls governing, glacial erosion on geological timescales remain poorly understood contended, particularly across Polar continental shields. Here, we assimilate geophysical data with modelling of Eurasian Sheet — third largest Quaternary ice mass that spanned 49°N to 82°N decipher its erosional footprint during entire last ~100 ka cycle. Our results demonstrate extreme spatial temporal heterogeneity in subglacial...
Abstract. After more than a century of geological research, the Cordilleran ice sheet North America remains among least understood in terms its former extent, volume, and dynamics. Because mountainous topography on which formed, studies have often had only local or regional relevance shown such complexity that ice-sheet-wide spatial reconstructions advance retreat patterns are lacking. Here we use numerical model calibrated against field-based evidence to attempt quantitative reconstruction...
The C ordilleran I ce S heet ( CIS ) covered much of the mountainous northwestern part N orth A merica at least several times during P leistocene. pattern and timing its growth decay are, however, poorly understood. Here, we present a reconstruction ice‐sheet retreat in central B ritish olumbia end last glaciation based on palaeoglaciological interpretation ice‐marginal meltwater channels, eskers deltas mapped from satellite imagery digital elevation models. consistent spatial high‐elevation...