Browsing Department of Earth Science by Author "Haflidason, Haflidi"
Now showing items 1-20 of 23
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Atlantic inflow and low sea-ice cover in the Nordic Seas promoted Fennoscandian Ice Sheet growth during the Last Glacial Maximum
Simon, Margit Hildegard; Rutledal, Sunniva; Menviel, Laurie; Zolles, Tobias; Haflidason, Haflidi; Born, Andreas; Berben, Sarah Miche Patricia; Dokken, Trond Martin (Journal article; Peer reviewed, 2023)The Atlantic water inflow into the Nordic Seas has proven difficult to reconstruct for the Last Glacial Maximum. At that time, the Fennoscandian Ice Sheet grew potentially to its maximum extent. Sea-ice free conditions in ... -
The Cenozoic western Svalbard margin: sediment geometry and sedimentary processes in an area of ultraslow oceanic spreading
Amundsen, Ingrid Marie Hasle; Blinova, Maria; Hjelstuen, Berit Oline; Mjelde, Rolf; Haflidason, Haflidi (Peer reviewed; Journal article, 2011-04-17)The northeastern high-latitude North Atlantic is characterised by the Bellsund and Isfjorden fans on the continental slope off west Svalbard, the asymmetrical ultraslow Knipovich spreading ridge and a 1,000 m deep rift ... -
Climate, glacial and vegetation history of the Polar Ural Mountains since early MIS 2 inferred from a 54-m-long sediment core from Lake Bolshoye Shuchye
Lenz, Marlene M.; Andreev, Andrei; Nazarova, Larisa; Syrykh, Liudmila S.; Scheidt, Stephanie; Haflidason, Haflidi; Meyer, Hanno; Brill, Dominik; Wagner, Bernd; Gromig, Raphael; Lenz, Matthias; Rolf, Christian; Kuhn, Gerhard; Fedorov, Grigoriy; Svendsen, John Inge; Melles, Martin (Journal article; Peer reviewed, 2021)Because continuous and high-resolution records are scarce in the polar Urals, a multiproxy study was carried out on a 54 m long sediment succession (Co1321) from Lake Bolshoye Shchuchye. The sedimentological, geochemical, ... -
A climatic trigger for the giant Troll pockmark field in the northern North Sea
Mazzini, Adriano; Svensen, Henrik; Forsberg, Carl Fredrik; Linge, Henriette; Lauritzen, Stein-Erik; Haflidason, Haflidi; Hammer, Øyvind; Planke, Sverre; Tjelta, Tor-Inge (Peer reviewed; Journal article, 2017-04)Pockmarks are seafloor craters usually formed during methane release on continental margins. However, the mechanisms behind their formation and dynamics remain elusive. Here we report detailed investigations on one of the ... -
Clitellate worms (Annelida) in late-glacial and Holocene sedimentary DNA records from the Polar Urals and northern Norway
Lammers, Youri; Clarke, Charlotte; Erséus, Christer; Brown, Antony Gavin; Edwards, Mary Elizabeth; Gielly, Ludovic; Haflidason, Haflidi; Mangerud, Jan; Rota, E; Svendsen, John-Inge; Alsos, Inger Greve (Peer reviewed; Journal article, 2018-11-26)While there are extensive macro‐ and microfossil records of a range of plants and animals from the Quaternary, earthworms and their close relatives amongst annelids are not preserved as fossils and therefore the knowledge ... -
A conceptual geological model for offshore wind sites in former ice stream settings: The Utsira Nord site, North Sea
Petrie, Hannah Elizabeth; Eide, Christian Haug; Haflidason, Haflidi; Watton, Timothy (Journal article; Peer reviewed, 2022)Conceptual geological models of the shallow subsurface that integrate geological and geotechnical information are important for more strategic data acquisition and engineering at offshore wind sites. Utsira Nord is an ... -
A continuous tephrostratigraphic record from the Labrador Sea spanning the last 65 ka
Rutledal, Sunniva; Haflidason, Haflidi; Berben, Sarah Miche Patricia; Griem, Lisa; Jansen, Eystein (Journal article; Peer reviewed, 2020)Volcanic ash preserved in marine sediment sequences is key for independent synchronization of palaeoclimate records within and across different climate archives. Here we present a continuous tephrostratigraphic record from ... -
Deglaciation of the Scandinavian Ice Sheet and a Younger Dryas ice cap in the outer Hardangerfjorden area, southwestern Norway
Regnéll, Carl; Briner, Jason P.; Haflidason, Haflidi; Mangerud, Jan; Svendsen, John Inge (Journal article; Peer reviewed, 2021)Understanding past responses of ice sheets to climate change provides an important long-term context for observations of present day, and projected future, ice-sheet change. In this work, we reconstruct the deglaciation ... -
Eight-hundred-year temperature variability from the Norwegian continental margin and the North Atlantic thermohaline circulation
Kristensen, Dorthe Klitgaard; Sejrup, Hans Petter; Haflidason, Haflidi; Berstad, I. M.; Mikalsen, G. (Journal article, 2004-04-17)Four cores raised from the eastern Norwegian Sea and adjacent Norwegian fjords at sites influenced by Atlantic water have been investigated. Oxygen isotope analyses in benthic and planktonic foraminifera are used as a proxy ... -
Eurasian Ice Sheet collapse was a major source of Meltwater Pulse 1A 14,600 years ago
Brendryen, Jo; Haflidason, Haflidi; Yokoyama, Yusuke; Haaga, Kristian Agasøster; Hannisdal, Bjarte (Journal article; Peer reviewed, 2020)Rapid sea-level rise caused by the collapse of large ice sheets is a threat to human societies. In the last deglacial period, the rate of global sea-level rise peaked at more than 4 cm yr−1 during Meltwater Pulse 1A, which ... -
Glacigenic sedimentation pulses triggered postglacial gas hydrate dissociation
Karstens, Jens; Haflidason, Haflidi; Becker, Lukas; Berndt, Christian; Rüpke, Lars Helmuth; Planke, Sverre; Liebetrau, Volker; Schmidt, Markus; Mienert, Jurgen (Peer reviewed; Journal article, 2018-02-12)Sediment cores from the south-eastern Nordic Seas simultaneously archive the variability of the Fennoscandian Ice Sheet (FIS), the British-Irish Ice Sheet (BIIS) and the regional oceanic conditions. This study aims to ... -
High‐resolution chronology of 24 000‐year long cores from two lakes in the Polar Urals, Russia, correlated with palaeomagnetic inclination records with a distinct event about 20 000 years ago
Haflidason, Haflidi; Brendryen, Jo; Eldegard, Reidun Fagerheim; Mangerud, Jan; Ólafsdóttir, Sædis; Regnéll, Carl; Svendsen, John Inge (Journal article; Peer reviewed, 2021)Based on radiocarbon dating, a tephra horizon, varve counts and palaeomagnetism, detailed age models covering the last ~24 k cal a bp, have been developed for the stratigraphy in the lakes Bolshoye Shchuchye and Maloye ... -
An integrated geological characterization of the Mid-Pleistocene to Holocene geology of the Sørlige Nordsjø II offshore wind site, southern North Sea
Petrie, Hannah Elizabeth; Eide, Christian Haug; Haflidason, Haflidi; Brendryen, Jo; Watton, Timothy (Journal article; Peer reviewed, 2024)Subsurface deposits in recently glaciated marine areas are highly heterogeneous, representing a range of glacial and postglacial environments and processes including glacitectonism, overconsolidation, fluvial and lacustrine ... -
A new high-resolution stratigraphic and palaeoenvironmental record spanning the End-Permian Mass Extinction and its aftermath in central Spitsbergen, Svalbard
Zuchuat, Valentin; Sleveland, Arve; Twitchett, Richard; Svensen, Henrik; Turner, Holly E; Augland, Lars Eivind; Jones, Morgan Thomas; Hammer, Øyvind; Hauksson, Bjarki; Haflidason, Haflidi; Midtkandal, Ivar; Planke, Sverre (Journal article; Peer reviewed, 2020-09-15)Research on the Permian-Triassic boundary (PTB) along the northern margins of Pangaea (exposed today in the Arctic region) has been heavily reliant on field observations, where data resolution was consequently determined ... -
Northward shifts in the polar front preceded Bølling and Holocene warming in southwestern Scandinavia
Cowling, Owen C.; Thomas, Elizabeth K.; Svendsen, John-Inge; Mangerud, Jan; Vasskog, Kristian; Haflidason, Haflidi (Journal article; Peer reviewed, 2020)The last deglaciation in northern Europe provides an opportunity to study the hydrologic component of abrupt climate shifts in a region with complex interactions between ice sheets and oceanic and atmospheric circulation. ... -
Norwegian margin outer shelf cracking: a consequence of climate-induced gas hydrate dissociation?
Mienert, Jurgen; Vanneste, Maarten; Haflidason, Haflidi; Bünz, Stefan (Peer reviewed; Journal article, 2010)A series of en echelon cracks run nearly parallel to the outer shelf edge of the mid-Norwegian margin. The features can be followed in a *60-km-long and *5-km-wide zone in which up to 10-m-deep cracks developed in the ... -
Palaeo-productivity record from Norwegian Sea enables North Atlantic Oscillation (NAO) reconstruction for the last 8000 years
Becker, Lukas; Sejrup, Hans Petter; Hjelstuen, Berit Oline Blihovde; Haflidason, Haflidi; Kjennbakken, Heidi; Werner, Johannes (Journal article; Peer reviewed, 2020)The North Atlantic Oscillation is the dominant atmospheric driver of North Atlantic climate variability with phases corresponding to droughts and cold spells in Europe. Here, we exploit a suggested anti-correlation of North ... -
Persistence of arctic-alpine flora during 24,000 years of environmental change in the Polar Urals
Clarke, Charlotte, L.; Edwards, Mary, E.; Gielly, L; Ehrich, Dorothee; Hughes, P.D.M.; Morozova, L.M.; Haflidason, Haflidi; Mangerud, Jan; Svendsen, John-Inge; Alsos, Inger Greve (Peer reviewed; Journal article, 2019-12-23)Plants adapted to extreme conditions can be at high risk from climate change; arctic-alpine plants, in particular, could “run out of space” as they are out-competed by expansion of woody vegetation. Mountain regions could ... -
Postglacial mass movements and depositional environments in a high-latitude fjord system – Hardangerfjorden, Western Norway
Bellwald, Benjamin; Hjelstuen, Berit Oline Blihovde; Sejrup, Hans Petter; Haflidason, Haflidi (Peer reviewed; Journal article, 2016-09)High resolution acoustic data and a 15.7 m long sediment core from the Hardangerfjorden system, western Norway, have been analyzed to increase our knowledge on depositional environments, submarine mass movement trigger ... -
Rapid and sustained environmental responses to global warming: the Paleocene–Eocene Thermal Maximum in the eastern North Sea
Stokke, Ella W.; Jones, Morgan Thomas; Riber, Lars; Haflidason, Haflidi; Midtkandal, Ivar; Schultz, Bo; Svensen, Henrik (Journal article; Peer reviewed, 2021)The Paleocene–Eocene Thermal Maximum (PETM; ∼ 55.9 Ma) was a period of rapid and sustained global warming associated with significant carbon emissions. It coincided with the North Atlantic opening and emplacement of the ...