Results 71 to 80 of about 99 (99)

Lateglacial and Holocene glacier variations in an active volcanic area, northern Jan Mayen (Nord‐Jan), Norway

Boreas, EarlyView.
Glacier evolution and environmental changes in the northern Jan‐Mayen from the early deglaciation and well into the Holocene are discussed. Results are based on a large chronological dataset (TCN and radiocarbon dates), integrated with field data on glacial landforms and sediments, including the use of GPR.
Astrid Lyså, Eiliv A. Larsen, Johanna Anjar, Naki Akçar, Asbjørn Hiksdal, Georgios Tassis   +5 more
wiley   +1 more source

Subglacial processes at the fringe of the last Scandinavian Ice Sheet in central Poland derived from macro‐ and micro‐sedimentological proxies

Boreas, EarlyView.
Here we report on the properties of a glacial sediment succession including various till facies and some subglacial meltwater deposits from a site in central Poland close to the outermost extent of the Scandinavian Ice Sheet during the last glaciation.
Piotr Hermanowski, Jan A. Piotrowski
wiley   +1 more source

The role of inland ice dynamics in controlling the variable maximum extent of the Laurentide Ice Sheet off southeastern Baffin Island

Boreas, EarlyView.
Reconstructions of the maximum extent of the Laurentide Ice Sheet (LIS) and its associated ice flows at the Last Glacial Maximum (LGM) are needed for understanding how marine‐based ice sheets will respond to modern climate change. Here, we provide evidence for the location of the maximal extent of the LIS margin during the LGM in Merchants and ...
Alexis P. Belko, Patrick Lajeunesse, Alexandre Normandeau, Pierre‐Olivier Couette, Etienne Brouard   +4 more
wiley   +1 more source

Cladocera assemblages indicate environmental gradients of lake productivity and morphometry in central Europe

Boreas, Volume 54, Issue 2, Page 258-272, April 2025.
Biological indicators are crucial for understanding lake systems over long temporal scales, requiring a comprehensive grasp of the factors influencing their distribution across environmental gradients. Our analysis of Cladocera assemblages from 64 lakes in NE Poland identified lake trophic state (total phosphorus) and depth as the primary factors ...
Izabela Zawiska, Alex Correa‐Metrio, Monika Rzodkiewicz, Jacek Wolski   +3 more
wiley   +1 more source

Automated delineation and morphometry of unclassified subglacial bedforms

Boreas, EarlyView.
We present an automated tool for mapping and analysing subglacial bedforms using volumetric obscurance, without classification. Tested on ArcticDEM data, the method produces bedform outlines with 75% correspondence compared to manually digitized maps.
Sofyane Hesni, Paul Bessin, Edouard Ravier, Olivier Bourgeois, Jean Vérité, Jean‐François Buoncristiani   +5 more
wiley   +1 more source

Relative sea‐level trends in southern Norway during the last millennium

Boreas, EarlyView.
Relative sea level in southern Norway has been falling since c. 7000 cal. yr BP, but modern tide gauge data show rising relative sea level since at least 1960 CE. In this study, peat cores from a shallow coastal basin were analysed, using a multiproxy approach, to reconstruct relative sea level trends over the last millennium and to identify the onset ...
Max Holthuis, F. Chantel Nixon, Malin E. Kylander, Willem G. M. van der Bilt, Isabel Hong, Kristen M. Joyse, Thomas R. Lakeman, Jake Martin, Maria Peter, Simon Solheim Holme, Benjamin P. Horton   +10 more
wiley   +1 more source

Complex past ice flow from Norway to the North Sea Plateau during the Quaternary: evidence from Marstein Trough and earlier reconstructions using 3D seismic data sets

Boreas, EarlyView.
We have mapped a 60 km long, 30 km wide, 120 m deep buried glacially eroded trough on the North Sea Plateau, west of the Norwegian Channel (59°N, 3°E). The trough was carved out by an ice stream that flowed out from western Norway and crossed the Norwegian Channel in a southwestern direction during the penultimate or Saalian glaciation.
Dag Ottesen, James D. Kirkham, Julian A. Dowdeswell, Harald Brunstad, Morten Halvorsen   +4 more
wiley   +1 more source

The morphosedimentary record of glacial to postglacial environmental changes in West Wiyâshâkimî impact crater lake and adjacent areas, northern Québec, Canada

Boreas, EarlyView.
Crater lakes in core regions of former ice sheets have the potential to preserve long‐term sedimentary archives that are otherwise rare in glaciated landscapes due to pervasive glacial erosion. Lake Wiyâshâkimî, an impact crater lake located in the inner core of the Québec‐Labrador Dome of the Laurentide Ice Sheet, provides a rare example of such a ...
Etienne Brouard, Patrick Lajeunesse
wiley   +1 more source

Palaeoenvironmental changes recorded at the Velika Vrbica loess‐palaeosol sequence, Wallachian Basin, during MIS 3–MIS 1

Boreas, EarlyView.
This study presents a detailed investigation of the Velika Vrbica loess‐palaeosol sequence, situated in the Wallachian Basin of northeastern Serbia, with the aim to reconstruct palaeoenvironmental changes spanning Marine Isotope Stages (MIS) 3 to 1. Using optically stimulated luminescence (OSL) dating, low field magnetic susceptibility (χlf), and mass ...
Zoran M. Perić, Cathal S. Ryan, Warren Thompson, Milica G. Radaković, Petar Krsmanović, Helena Alexanderson, Slobodan B. Marković   +6 more
wiley   +1 more source

Comments on ‘Late Middle Pleistocene Wolstonian Stage (MIS 6) glaciation in lowland Britain and its North Sea regional equivalents – a review’

Boreas, EarlyView.
Divergent views debated over the past 20 years on the Wolstonian depositional record of Fenland and the Peterborough area have centred on whether there is evidence of a single (middle or late) glaciation or of both a middle and a late glaciation. A recent review promoted a single late Wolstonian glaciation, despite there being incontrovertible evidence
Harry E. Langford
wiley   +1 more source