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Assessing Environmental Quality in a Historically Polluted Fjord: A Comparison of Benthic Foraminiferal eDNA and Morphospecies Approaches
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-11-30)This study is the first assessment of a fjord Ecological Quality Status (EcoQS) by comparing both the traditional morphology-based and emerging metabarcoding techniques in benthic foraminifera. For this, we focus on historically polluted Idefjord on the Swedish Norwegian border, which has experienced high effluent load from pulp and paper mill for almost a century. Based on our results, the morphological ... -
Impact of Paleocene–Eocene tectonic and climatic forcing on Arctic sediment transfer variability: SW Barents Sea, Norway
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-11-29)During the Paleocene and Eocene, many Arctic basins experienced multiple, yet synchronous periods of increased sedimentation rates. Several causal factors have been suggested including major volcanic events, tectonic plate reorganization and plate break-up, as well as widespread uplift along with contemporaneous and short-lived hyperthermal events. However, the significance of and relation between ... -
Semi-automated analysis of faults with meter-scale displacements and networks of planar features using high-resolution 3D seismic to investigate gas leakage at the Vestnesa Ridge, eastern Fram Strait
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-11-13)We develop a semiautomated method for extracting faults and other planar features from two high-resolution (HR) seismic volumes in the eastern Fram Strait. We assess seismic data quality and resolution prior to structural interpretation to determine the appropriate processing workflow. This workflow, designed for HR data sets, identifies meter-scale (>3–4 m) faults and other planar features, picked ... -
Creating better internships by understanding mentor challenges: findings from a series of focus groups
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-12-15)Background - Despite demands to make higher education more relevant beyond academia, and a growing body of work testifying to the benefits of work-relevance programs (e.g., work-placements, or internships) for both students and the companies that host them, there is limited information available for those aiming to optimize these programs. For example, few have explored the challenges and needs of ... -
BFR2: a curated ribosomal reference dataset for benthic foraminifera
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-11-27)Benthic foraminifera are one of the major groups of marine protists that also occur in freshwater and terrestrial habitats. They are widely used to monitor current and past environmental conditions. Over the last three decades, thousands of DNA sequences have been obtained from benthic foraminiferal isolates. The results of this long-term effort are compiled here in the form of the first curated ... -
A Sequential Leaching Protocol for δ11B and Trace Element Analyses of Multi-Phase Carbonate Rocks
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-10-22)Boron geochemistry from biogenic carbonates offer valuable information about ocean pH and CO<sub>2</sub> chemistry. However, application to geological carbonate deposits suffers from analytical difficulties in obtaining geochemical signals exclusively from the carbonate phase. Sequential leaching with reagents and acids has the potential to overcome such an issue. There is, however, little systematic ... -
Editorial: Natural methane emissions in a changing arctic – implications for climate and environment
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-10-23)Natural methane emissions have received significant attention in recent years due to the documented increase in atmospheric concentrations of methane and its elevated global warming potential relative to CO2. Over the past decades, the Arctic has been warming nearly four times faster than the rest of the planet (Rantanen et al., 2022). Arctic amplification of global warming drives a pressing need ... -
Cambrian-Ordovician trace fossils of the Basissletta region, northeast Spitsbergen, Svalbard
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-10-29)Trace fossils of the Cambrian–Ordovician sedimentary succession of the Basissletta region, northeast Spitsbergen, Svalbard, belong to three ichnoassemblages. The first one, composed of Monocraterion and Diplocraterion, belongs to the Skolithos ichnofacies and characterises sandstones of the Tokammane Formation (lower Cambrian: Terreneuvian) deposited in a shallow subtidal setting. The overlying ... -
Motivation for slushflow classification
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024)Slushflows are a type of rapid mass movement where water saturated snow flows downhill. Slushflows come in many different sizes, have different triggering mechanisms, and contain debris ranging from simply snow and ice to soil, rock and vegetation. Slushflows are often misclassified as debris flows, wet snow avalanches or river/stream ice jam processes. <p> <p>Norway reports 5 to 20 larger ... -
Limitations of RAMMS:Debrisflow as a slushflow simulation tool
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024)Slushflows are defined as water-saturated snow (slush), that moves rapidly downslope as a gravitational mass flow. The high-water content of the flow results in a high density, posing a significant danger to construction, infrastructure and people in its path. To reduce this danger, it is important to predict where slushflows may initiate and travel in the terrain. Numerical modelling of the runout ... -
Building resilience to avalanches and other climate-driven geohazards through international collaboration in education: experience from the GEOMME partnership
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024)The GEOMME international partnership for ‘Climate-driven GEOhazards Mitigation, Management, and Education’ fosters collaboration in research and education on climate-driven geohazards across South Korea, Japan, and Norway. The initiative focuses on enhancing societal resilience against gravitational mass flows through excellence in education and research, aiming to improve the adaptive capacities ... -
Neogene - Quaternary evolution of the northeastern Fram gateway, European Arctic
(Conference object; Konferansebidrag, 2024-10) -
Arctic freshwater outflow suppressed Nordic Seas overturning and oceanic heat transport during the Last Interglacial
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-10-27)The Last Interglacial period (LIG) was characterized by a long-term Arctic atmospheric warming above the preindustrial level. The LIG thus provides a case study of Arctic feedback mechanisms of the cryosphere-ocean circulation-climate system under warm climatic conditions. Previous studies suggested a delay in the LIG peak warming in the North Atlantic compared to the Southern Ocean and evoked the ... -
Integrating ROV MBES and photogrammetry data for comprehensive mapping of cold seep systems at Hakon Mosby Mud Volcano (HMMV) in the Barents Sea
(Conference object; Konferansebidrag, 2024-07) -
Major tunnel valleys and sedimentation changes document extensive Early Pleistocene glaciations of the Barents Sea
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-10-02)Sedimentary records of Early Pleistocene (~2.6–0.8 Ma) glaciations are sparse on shelves, yet trough mouth fans on adjacent continental slopes provide a continuous record of ice-sheet and climate development throughout the Quaternary. Here, we interpret high-quality 3D seismic reflection data combined with borehole and chronostratigraphic information from a shelf-slope setting in the southwestern ... -
Pliocene-Pleistocene warm-water incursions and water mass changes on the Ross Sea continental shelf (Antarctica) based on foraminifera from IODP Expedition 374
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-07-11)International Ocean Discovery Program (IODP) Expedition 374 sailed to the Ross Sea in 2018 to reconstruct paleoenvironments, track the history of key water masses, and assess model simulations that show warm-water incursions from the Southern Ocean led to the loss of marine-based Antarctic ice sheets during past interglacials. IODP Site U1523 (water depth 828 m) is located at the continental shelf ... -
Morphological analysis of mass-transport deposits in Cenozoic sediments at the Southern Vøring Margin
(Mastergradsoppgave; Master thesis, 2024-08-30)This thesis builds an evolutionary history of recent times for a region of the Southern Vøring margin west of the Vigrid Syncline, focusing mainly on the morphological traits of mass-transport complexes and selected internal structures. The scenario covers the last 0.8 million years, the three later periods of Naust time. Preliminary research was done on pertinent geological processes and features ... -
Some issues related to the Svalbardian tectonic event (Ellesmerian Orogeny) in Svalbard
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-07-23)Svalbard has long been thought to represent the easternmost realm of the Ellesmerian Orogeny in the late Devonian or early Mississippian (Svalbardian tectonic event). Several authors do not agree and present alternative interpretations of the observed structures in older and more recent articles. This article discusses a number of issues that, in our opinion, are not sufficiently considered in ... -
Metallogenic model of the Lykling ophiolite-hosted lode Au deposit, Scandinavian Caledonides: Insight from fluid inclusions, mineral chemistry and stable isotope geochemistry
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-09-10)The Lykling lode Au deposit represents a unique example of gold mineralization in the Upper Allochthone of the Scandinavian Caledonides. The mineralization is hosted by the Early Ordovician Lykling Ophiolite Complex and the intruding trondhjemite unit and spatially associated with two generations of mafic dykes that crosscut both the ophiolitic complex and trondhjemite. Field observations indicate ... -
Variations in deep-sea methane seepage linked to millennial-scale changes in bottom water temperatures ~ 50–6 ka, NW Svalbard margin
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-09-27)During the last glaciation, the northern hemisphere experienced profound millennial-scale changes (termed Dansgaard-Oeschger (DO) events) in atmospheric and oceanic temperatures. In the North Atlantic, the fluctuations resulted in extremely unstable bottom water conditions with bottom water temperatures (BWT) varying up to > 5 °C. We have studied these changes in a core from 1,300 m water depth ...
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