A5085294385- Geology and Paleoclimatology Research
- Cryospheric studies and observations
- Climate change and permafrost
- Pleistocene-Era Hominins and Archaeology
- Geological formations and processes
- Methane Hydrates and Related Phenomena
- Landslides and related hazards
- Karst Systems and Hydrogeology
- Geological Studies and Exploration
- Marine and environmental studies
- Polar Research and Ecology
- Groundwater and Isotope Geochemistry
- Geotechnical and Geomechanical Engineering
- Winter Sports Injuries and Performance
- Aeolian processes and effects
- Maritime and Coastal Archaeology
- Image Processing and 3D Reconstruction
- earthquake and tectonic studies
- Geological and Geochemical Analysis
- Paleontology and Stratigraphy of Fossils
- Atmospheric and Environmental Gas Dynamics
- Isotope Analysis in Ecology
- High-pressure geophysics and materials
- Geological Modeling and Analysis
- Cruise Tourism Development and Management
Bjerknes Centre for Climate Research
2012-2024
University of Bergen
2015-2024
Washington State University Vancouver
2001
Five regionally significant Weichselian glacial events, each separated by terrestrial and marine interstadial conditions, are described from northwestern Russia. The first event took place in the Early Weichselian. An ice sheet centred Kara Sea area dammed up a large lake Pechora lowland. Water was discharged across threshold on Timan Ridge via an ice‐free corridor between Scandinavian Ice Sheet to west north into Barents Sea. next glaciation occurred around 75–70 kyr BP after episode that...
A detailed climate proxy record based on δ 18 O, 13 and grey index of a well‐dated stalagmite from Cold Air Cave in the Makapansgat Valley north‐eastern South Africa suggests that regional precipitation, temperatures vegetation oscillated markedly rapidly over last ∼6500 years centennial multi‐decadal scales. The mid‐Holocene prior to 5200 ago was humid warm. fundamental transition occurred 3200 ago, leading drier cooler conditions culminated at 1750 AD. Comparisons with ice core records...
Synthetic aperture radar interferometry (InSAR) measurements demonstrate that lobate, blocky depositional landforms, located in southern Norway at an altitude of ~530 m above sea level, with estimated mean annual air temperature ~1.6°C, currently exhibit deformation attributed to viscous creep. Five years InSAR for six lobes average surface velocities 1.2–22.0 mm/year maximum rates 17.5–55.6 mm/year. New Schmidt-hammer exposure-age dating (SHD) two proximal reveals mid-Holocene ages (7.6 ±...
We present 23 cosmogenic surface exposure ages from 10 localities in southern S weden. The new B e allow a direct correlation between the east and west coasts of weden, based on same dating technique, provide information about deglaciation F ennoscandian I ce heet circum‐ altic area. In western kåne, southernmost single sample gave an age 16.8±1.0 ka, whereas two samples central part kåne 17.0±0.9 14.1±0.8 ka. Further northeast, måland, ranging 15.2±0.8 to 16.9±0.9 ka (n=5) indicating...
ABSTRACT Three relict talus‐foot rock glaciers at Øyberget, upper Ottadalen, were dated using high‐precision Schmidt hammer exposure‐age dating (SHD). A SHD calibration curve was constructed for the local banded gneiss two control points: (1) fresh bedrock in a road cutting; and (2) glacially scoured surfaces deglaciated c . 9.7 ka. Two alternative hypotheses are suggested to explain ages (± 95% confidence intervals) of 10 340 ± 1280, 9920 1385 8965 1700 years obtained three located ~ 1000 m...
Abstract Glaciers create some of Earth’s steepest topography; yet, many areas that were repeatedly overridden by ice sheets in the last few million years include extensive plateaus. The distinct geomorphic contrast between plateaus and glacial troughs dissect them has sustained two long-held hypotheses: first, perform insignificant erosion beyond troughs, and, second, represent ancient pre-glacial landforms bearing information tectonic history prior to Pliocene–Pleistocene global cooling...
We employ U-Pb calcite dating of structurally-controlled fracture fills within crystalline Caledonian basement in western Norway to reveal subtle large-scale tectonic events that affected this rifted continental margin. The ages (15 total) fall into four distinct groups with mainly ranging from latest Cretaceous Pleistocene. (1) three oldest (Triassic-Jurassic) refine the complex faulting history a reactivated fault strand originated collapse and broadly correlate known rifting offshore. (2)...
The Late W eichselian ice sheet of western S valbard was characterized by streams and inter‐ice‐stream areas. To reconstruct its geometry dynamics we investigated the glacial geology two areas on island Prins Karls Forland Mitrahalvøya peninsula. Cosmogenic 10 B e surface exposure dating erratics bedrock used to constrain past thickness, providing minimum estimates in both Contrary previous studies, found that P rins K arls F orland experienced a westward flux from pitsbergen. Ice thickness...
Cosmogenic nuclides are typically used to either constrain an exposure age, a burial or erosion rate. Constraining the landscape history and past rates in previously glaciated terrains is, however, notoriously difficult because it involves large number of unknowns. The potential use cosmogenic landscapes with complex is therefore often quite limited. Here, we present novel multi-nuclide approach study evolution history, particularly focusing on regions that were repeatedly covered by...
Surface exposure–age dating was applied to rock surfaces associated with ice‐marginal moraines at elevations of ~1520–1780 m a.s.l. on the slopes Galdhøpiggen and Glittertinden, two highest mountains in Scandinavia located Jotunheimen central southern Norway. This is important for understanding pattern timing wastage Scandinavian Ice Sheet Younger Dryas–Holocene transition. Cosmogenic exposure (here 10 Be dating) boulders from moraine ridges yielded overall mean ages (corrected...
Blockfields, weathering boundaries and marginal moraines have been mapped along a longitudinal transect from northern Andøya to Skånland in Norway. The degree of rock‐surface above below glacial trimlines, clay‐mineral assemblages surface exposure dating based on situ cosmogenic 10 Be used reconstruct the vertical dimensions timing Last Glacial Maximum (LGM) Scandinavian Ice Sheet this region. dates suggest that lower blockfield boundary/trimline Andøya‐Skånland represents upper limit Late...
Abstract. The sensitivity of terrestrial environments to past changes in heat transport is expected be manifested Holocene climate proxy records on millennial seasonal timescales. Stalagmite formation the Okshola cave near Fauske (northern Norway) began at about 10.4 ka, soon after valley was deglaciated. Past monitoring and surface has revealed stable modern conditions with uniform drip rates, relative humidity temperature. Stable isotope from two stalagmites provide time-series spanning c....
Abstract In this study we have obtained 17 cosmogenic exposure ages from three well‐developed moraine systems – Halland Coastal Moraines (HCM), Göteborg Moraine (GM) and Levene (LM) which were formed during the last deglaciation in southwest Sweden by Scandinavian Ice Sheet (SIS). The inferred of inner HCM, GM LM are 16.7 ± 1.6, 16.1 1.4 13.6 ka, respectively, is slightly older than previous estimates based on minimum limiting radiocarbon pollen stratigraphy. During short interval 1.6 to ka...