Department of Earth Science
Nye registreringer
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Potential and limitation of 230Th-excess as a chronostratigraphic tool for late Quaternary Arctic Ocean sediment studies: An example from the Southern Lomonosov Ridge
(Journal article; Peer reviewed, 2022)Recently, the use of “extinction ages” of excesses in U-series isotopes (230Thxs, 231Paxs) has been proposed for the setting of benchmark ages of up to ~350 and ~150 ka, respectively, in late Quaternary marine records from ... -
Dansgaard-Oeschger and Heinrich event temperature anomalies in the North Atlantic set by sea ice, frontal position and thermocline structure
(Journal article; Peer reviewed, 2022)We use eighteen timescale-synchronised near-surface temperature reconstructions spanning 10–50 thousand years before present to clarify the regional expression of Dansgaard-Oeschger (D-O) and Heinrich (H) events in the ... -
Reconstructing surface mass balance from the englacial stratigraphy of the Greenland Ice Sheet
(Doctoral thesis, 2022-09-30)Interiøren av isflakene består av mange lag akkumulert snø, hvis tykkelse avhenger av overflatemassebalanse (OMB) fra fortiden og effekten av dynamisk tynning etter lagenes avsetning. Denne oppgaven undersøker påvirkningen ... -
Nutrient‑limited subarctic caves harbour more diverse and complex bacterial communities than their surface soil
(Journal article; Peer reviewed, 2022)Background Subarctic regions are particularly vulnerable to climate change, yet little is known about nutrient availability and biodiversity of their cave ecosystems. Such knowledge is crucial for predicting the vulnerability ... -
Geochemical characterization of the Gnitahei seafloor massive sulfide deposit, Arctic Mid-Ocean Ridge
(Master thesis, 2022-06-29) -
On the accuracy and spatial sampling of finite-difference modelling in discontinuous models
(Journal article; Peer reviewed, 2022)Finite-difference modelling estimates the wavefield in the subsurface by solving the elastic or acoustic wave equation numerically in a discrete version of the subsurface. The derivatives in the wave equation are approximated ... -
Seismic modelling of the stratigraphic architecture of syn-rift deep-water channel complexes in the Corinth Rift, Greece
(Master thesis, 2022-08-03)Deep-water systems in rift basins lack extensive research because they tend to be buried in the subsurface making them hard to study directly. Rare, exhumed deep-water syn-rift depositional systems can therefore provide ... -
Driving Mechanisms of an Extreme Winter Sea Ice Breakup Event in the Beaufort Sea
(Journal article; Peer reviewed, 2022)The thick multiyear sea ice that once covered large parts of the Arctic is increasingly being replaced by thinner and weaker first-year ice, making it more vulnerable to breakup by winds. We use the neXtSIM sea ice model ... -
Rapid post-glacial bedrock weathering in coastal Norway
(Journal article; Peer reviewed, 2022)Quantifying bedrock weathering rates under diverse climate conditions is essential to understanding timescales of landscape evolution. Yet, weathering rates are often difficult to constrain, and associating a weathered ... -
Integrating Multidisciplinary Observations in Vent Environments (IMOVE): Decadal Progress in Deep-Sea Observatories at Hydrothermal Vents
(Journal article; Peer reviewed, 2022-05-13)The unique ecosystems and biodiversity associated with mid-ocean ridge (MOR) hydrothermal vent systems contrast sharply with surrounding deep-sea habitats, however both may be increasingly threatened by anthropogenic ... -
Geochemistry of hydrothermal fluids from the E2-segment of the East Scotia Ridge: Magmatic input, reaction zone processes, fluid mixing regimes and bioenergetic landscapes
(Journal article; Peer reviewed, 2022)The compositions of hydrothermal fluids in back-arc basins (BABs) can be affected by the influx of magmatic fluids into systems that are dominated by reactions between basement rocks and seawater-derived fluids. The East ... -
Climate transition at the Eocene-Oligocene influenced by bathymetric changes to the Atlantic-Arctic oceanic gateways
(Journal article; Peer reviewed, 2022)The Eocene–Oligocene Transition (∼33.9 Ma) marks the largest step transformation within the Cenozoic cooling trend and is characterized by a sudden growth of the Antarctic ice sheets, cooling of the interior ocean, and the ... -
Late Quaternary mud-dominated, basin-floor sedimentation of the Gulf of Corinth, Greece: Implications for deep-water depositional processes and controls on syn-rift sedimentation
(Journal article; Peer reviewed, 2022)Syn-rift deep-water muds and mudstones preserve a relatively complete stratigraphic record of tectonic and climatic events. This paper investigates mud-dominated deposits and stratigraphy using core from International Ocean ... -
A conceptual geological model for offshore wind sites in former ice stream settings: The Utsira Nord site, North Sea
(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 ... -
Revised ΔR values for the Barents Sea and its archipelagos as a pre-requisite for accurate and robust marine-based 14C chronologies
(Journal article; Peer reviewed, 2022)The calibration of marine 14C dates requires the incorporation of regionally specific marine reservoir offsets known as ΔR, essential for accurate and meaningful inter-archive comparisons. Revised, regional ΔR (‘ΔRR’) ... -
Comparison between Air Temperature and Land Surface Temperature for the City of São Paulo, Brazil
(Journal article; Peer reviewed, 2022)This study aims to identify the relationship between changes in temperature regarding urbanization processes and seasonality in the city of São Paulo, located in the Tropic of Capricorn. The land surface temperature (LST) ... -
Geofaglig vurdering av konsekvenser ved klimaframskrivinger for verdensarvområdet Vestnorsk fjordlandskap, delområde Geirangerfjorden
(Master thesis, 2022-06-01)I Møre og Romsdal er det forventet en økning i temperatur og nedbør frem mot perioden 2071-2100. Dette inkluderer en økning i årlig middeltemperatur på ca. 3,5-4,0 ºC og en økning i årsnedbør på 15%. Økningen vil føre til ... -
Vurdering og tentativ kvantifisering av stislitasje i Geirangerfjorden verdsarvområde
(Master thesis, 2022-06-01)Ferdsel i stiar fører til auka erosjon i lausmassane og slitasje på forvitringshuda til dei harde overflatene i stiane. Problemstillinga i denne oppgåva omhandlar tentativ kvantifisering av stislitasje i lausmassar og på ... -
Processing and interpretation of reflection seismic data from Isfjorden, Svalbard
(Master thesis, 2022-06-01)The geology of the present-day Svalbard is complex and has formed through several million years of repeated episodes of orogeneses, uplift, deformation and erosion. This has resulted in complex deformation structures and ... -
Crystallographic orientation mapping of lizardite serpentinite by Raman spectroscopy
(Journal article; Peer reviewed, 2022)The serpentine mineral lizardite displays strong Raman anisotropy in the OH-stretching region, resulting in significant wavenumber shifts (up to ca. 14.5 cm−1) that depend on the orientation of the impinging excitation ...
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