Viser treff 1-20 av 767

    • Semi‐automatic Ice Rafted Debris quantification with Computed Tomography 

      Cederstrøm, Jan Magne; Bilt, Willem Godert Maria van der; Støren, Eivind Wilhelm Nagel; Rutledal, Sunniva (Journal article; Peer reviewed, 2021)
      Sedimentary ice-rafted debris (IRD) provides critical information about the climate sensitivity and dynamics of ice sheets. In recent decades, high-resolution investigations have revelated ice rafting events in response ...
    • Deep-ocean circulation in the North Atlantic during the Plio-Pleistocene intensification of Northern Hemisphere Glaciation (~2.65–2.4 Ma) 

      Jacob, Kim A.; Pross, Jörg; Link, Jasmin M.; Blaser, Patrick; Braaten, Anna Hauge; Friedrich, Oliver (Journal article; Peer reviewed, 2021)
      Through transporting heat around the world and thereby regulating global climate, ocean circulation is an integral part of Earth's climate system that likely changed substantially on glacial-interglacial timescales in the ...
    • Linking sediment supply variations and tectonic evolution in deep time, source-to-sink systems—The Triassic Greater Barents Sea Basin 

      Gilmullina, Albina; Klausen, Tore Grane; Doré, Anthony George; Rossi, Valentina Marzia; Suslova, Anna A.; Eide, Christian Haug (Journal article; Peer reviewed, 2021)
      Triassic strata in the Greater Barents Sea Basin are important records of geodynamic activity in the surrounding catchments and sediment transport in the Arctic basins. This study is the first attempt to investigate the ...
    • The formation of the ophiolitic terrane of SW Norway - relationships between immature island arc volcanic sequences and trondhjemitic complexes on Bømlo 

      Saltvedt, Simen (Master thesis, 2021-10-01)
      Single zircon U/Pb dating, geochemistry, and field descriptions from trondhjemitic and tonalitic intrusions, intruding the Lykling Ophiolite Complex, provide new insights into the origin and evolution of the Early Ordovician ...
    • Higher-order Hamilton–Jacobi perturbation theory for anisotropic heterogeneous media: dynamic ray tracing in ray-centred coordinates 

      Iversen, Einar; Ursin, Bjørn; Saksala, Teemu; Ilmavirta, Joonas; V. de Hoop, Maarten (Journal article; Peer reviewed, 2021)
      Dynamic ray tracing is a robust and efficient method for computation of amplitude and phase attributes of the high-frequency Green’s function. A formulation of dynamic ray tracing in Cartesian coordinates was recently ...
    • Late Quaternary dynamics of Arctic biota from ancient environmental genomics 

      Wang, Yucheng; Pedersen, Mikkel W.; Alsos, Inger Greve; De Sanctis, Bianca; Racimo, Fernando; Prohaska, Ana; Coissac, Eric; Owens, Hannah L.; Merkel, Marie Føreid; Fernandez-Guerra, Antonio; Rouillard, Alexandra; Lammers, Youri; Alberti, Adriana; Denoeud, France; Money, Daniel; Ruter, Anthony H.; McColl, Hugh; Larsen, Nicolaj K.; Cherezova, Anna A.; Edwards, Mary E.; Fedorov, Grigory B.; Haile, James; Orlando, Ludovic; Vinner, Lasse; Korneliussen, Thorfinn S.; Beilman, David W.; Bjørk, Anders A.; Cao, Jialu; Dockter, Christoph; Esdale, Julie; Gusarova, Galina; Kjeldsen, Kristian K.; Mangerud, Jan; Rasic, Jeffrey T.; Skadhauge, Birgitte; Svendsen, John Inge; Tikhonov, Alexei N.; Wincker, Patrick; Xing, Yingchun; Zhang, Yubin; Froese, Duane G.; Rahbek, Carsten; Nogues, David B; Holden, Philip B.; Edwards, Neil R.; Durbin, Richard; Meltzer, David J.; Kjær, Kurt H.; Moller, Per; Willerslev, Eske (Journal article; Peer reviewed, 2021)
      During the last glacial–interglacial cycle, Arctic biotas experienced substantial climatic changes, yet the nature, extent and rate of their responses are not fully understood1,2,3,4,5,6,7,8. Here we report a large-scale ...
    • Microstructure and fluid flow in the vicinity of basin bounding faults in rifts – The Dombjerg Fault, NE Greenland rift system 

      Salomon, Eric; Rotevatn, Atle; Kristensen, Thomas Berg; Grundvåg, Sten-Andreas; Henstra, Gijs Allard (Journal article; Peer reviewed, 2021)
      Faults commonly form loci for high fluid flux in sedimentary basins, where fluids, rocks and deformation processes frequently interact. Here, we elucidate the interaction of fluid flow, diagenesis and deformation near ...
    • The Storfjorden, Svalbard, earthquake sequence 2008-2020: Transtensional tectonics in an arctic intraplate region 

      Ottemöller, Lars; Kim, Won-Young; Waldhauser, Felix; Tjåland, Norunn; Dallmann, Winfried (Journal article; Peer reviewed, 2021)
      An earthquake sequence in the Storfjorden offshore area southwest of Spitsbergen in the Svalbard archipelago initiated with a 21 February 2008 magnitude Mw 6.1 event. This area had previously not produced any significant ...
    • Homotopy scattering series for seismic forward modelling with variable density and velocity 

      Xiang, Kui; Eikrem, Kjersti Solberg; Jakobsen, Morten; Nævdal, Geir (Journal article; Peer reviewed, 2021)
      We have derived a convergent scattering series solution for the frequency-domain wave equation in acoustic media with variable density and velocity. The convergent scattering series solution is based on the homotopy analysis ...
    • Probabilistic Tsunami Hazard and Risk Analysis: A Review of Research Gaps 

      Behrens, Jörn; Løvholt, Finn; Jalayer, Fatemeh; Lorito, Stefano; Salgado-Gálvez, Mario A.; Sørensen, Mathilde Bøttger; Abadie, Stephane; Aguirre-Ayerbe, Ignacio; Aniel-Quiroga, Iñigo; Babeyko, Andrey; Baiguera, Marco; Basili, Roberto; Belliazzi, Stefano; Grezio, Anita; Johnson, Kendra; Murphy, Shane; Paris, Raphaël; Rafliana, Irina; De Risi, Raffaele; Rossetto, Tiziana; Selva, Jacopo; Taroni, Matteo; Del Zoppo, Marta; Armigliato, Alberto; Bureš, Vladimír; Cech, Pavel; Cecioni, Claudia; Christodoulides, Paul; Davies, Gareth; Dias, Frédéric; Bayraktar, Hafize Başak; González, Mauricio; Gritsevich, Maria; Guillas, Serge; Harbitz, Carl Bonnevie; Kânoǧlu, Utku; Macías, Jorge; Papadopoulos, Gerassimos A.; Polet, Jascha; Romano, Fabrizio; Salamon, Amos; Scala, Antonio; Stepinac, Mislav; Tappin, David R.; Thio, Hong Kie; Tonini, Roberto; Triantafyllou, Ioanna; Ulrich, Thomas; Varini, Elisa; Volpe, Manuela; Vyhmeister, Eduardo (Journal article; Peer reviewed, 2021)
      Tsunamis are unpredictable and infrequent but potentially large impact natural disasters. To prepare, mitigate and prevent losses from tsunamis, probabilistic hazard and risk analysis methods have been developed and have ...
    • Improved seismic monitoring with OBS deployment in the Arctic: A pilot study from offshore western Svalbard 

      Jeddi, Zeinab; Ottemöller, Lars; Sørensen, Mathilde Bøttger; Rezaei, Sara; Gibbons, Steven John; Strømme, Marte L.; Voss, Peter H.; Dahl-Jensen, Trine (Journal article; Peer reviewed, 2021)
      The mid‐ocean ridge system is the main source of earthquakes within the Arctic region. The earthquakes are recorded on the permanent land‐based stations in the region, although, smaller earthquakes remain undetected. In ...
    • Teaching with digital geology in the high Arctic: opportunities and challenges 

      Senger, Kim; Betlem, Peter; Grundvåg, Sten-Andreas; Horota, Rafael Kenji; Buckley, Simon John; Smyrak-Sikora, Aleksandra; Jochmann, Malte Michel; Birchall, Thomas; Janocha, Julian; Ogata, Kei; Kuckero, Lilith; Johannessen, Rakul Maria; Lecomte, Isabelle Christine; Cohen, Sarah M.; Olaussen, Snorre (Journal article; Peer reviewed, 2021)
      The Covid-19 pandemic occurred at a time of major revolution in the geosciences – the era of digital geology. Digital outcrop models (DOMs) acquired from consumer drones, processed using user-friendly photogrammetric ...
    • Detrital zircon provenance of the Bremnes Migmatite Complex on Bømlo, SW Norway 

      Slotnes, Matz Sagebakken (Master thesis, 2021-09-29)
      Detrital zircon provenance, geochemistry, and field descriptions from the Bremnes Migmatite Complex provide new insights in the origin and evolution of the Early Ordovician ophiolitic terrane of SW Norway. The Bremnes ...
    • Anthropogenic and environmental drivers of vegetation change in southeastern Norway during the Holocene 

      ter Schure, Anneke Theresia Maria; Bajard, Manon Juliette Andree; Loftsgarden, Kjetil; Høeg, Helge Irgens; Ballo, Eirik Gottschalk; Bakke, Jostein; Støren, Eivind Wilhelm Nagel; Iversen, Frode; Kool, Anneleen; Brysting, Anne Krag; Krüger, Kirstin; Boessenkool, Sanne (Journal article; Peer reviewed, 2021)
      Uncovering anthropogenic and environmental drivers behind past biological change requires integrated analyses of long-term records from a diversity of disciplines. We applied an interdisciplinary approach exploring effects ...
    • Orogenesis from bottom to top – Investigating the geodynamics of mountain building using coupled thermo-mechanical-surface-process models 

      Wolf, Sebastian Georg (Doctoral thesis, 2021-03-10)
      The objective of this project is to The objective of this project is to advance our understanding of mountain building processes in different plate tectonic settings and with specific focus on the interaction between surface ...
    • Geochemical characteristics of volcanogenic massive sulfide mineralizations on Bømlo and Stord islands, Sunnhordaland, SW Norway 

      Fjellet, Trond (Master thesis, 2021-09-11)
      The results from the present study have brought forward new knowledge about geochemical, mineralogical, stable isotope and trace element data for volcanogenic massive sulfide deposits hosted within Early Ordovician Ophiolitic ...
    • Sedimentary ancient DNA shows terrestrial plant richness continuously increased over the Holocene in northern Fennoscandia 

      Rijal, Dilli Prasad; Heintzman, Peter D.; Lammers, Youri; Yoccoz, Nigel; Lorberau, Kelsey; Pitelkova, Iva; Goslar, Tomasz; Murguzur, Francisco Javier Ancin; Salonen, J. Sakari; Helmens, Karin F.; Bakke, Jostein; Edwards, Mary E.; Alm, Torbjørn; Bråthen, Kari Anne; Brown, Antony; Alsos, Inger Greve (Journal article; Peer reviewed, 2021)
      The effects of climate change on species richness are debated but can be informed by the past. Here, we generated a sedimentary ancient DNA dataset covering 10 lakes and applied novel methods for data harmonization. We ...
    • Sedimentary response to tectonism and rifting in basins on the Norwegian shelf and onshore Norway 

      Folkestad, Atle (Doctoral thesis, 2021-09-10)
      The Norwegian sedimentary basins offshore and onshore have in variable degree been influenced by tectonism as rifting and faulting during deposition. This stems from post Caledonian extensional events that affected both ...
    • Large-scale features of Last Interglacial climate: results from evaluating the lig127k simulations for the Coupled Model Intercomparison Project (CMIP6)–Paleoclimate Modeling Intercomparison Project (PMIP4) 

      Otto-Bliesner, Bette L.; Brady, Esther C.; Zhao, Anni; Brierley, Chris M.; Axford, Yarrow; Capron, Emilie; Govin, Aline; Hoffman, Jeremy S.; Isaacs, Elizabeth; Kageyama, Masa; Scussolini, Paolo; Tzedakis, Polychronis C.; Williams, Charles J.R.; Wolff, Eric W.; Abe-Ouchi, Ayako; Braconnot, Pascale; Ramos Buarque, Silvana; Cao, Jian; de Vernal, Anne; Vittoria Guarino, Maria; Guo, Chuncheng; Legrande, Allegra N.; Lohmann, Gerrit; Meissner, Katrin J.; Menviel, Laurie; Morozova, Polina A.; Nisancioglu, Kerim H.; O'Ishi, Ryouta; Mélia, David Salas Y.; Shi, Xaoxu; Sicard, Marie; Sime, Louise C.; Stepanek, Christian; Tomas, Robert A.; Volodin, Evgeny; Yeung, Nicholas K.H.; Zhang, Qiong; Zhang, Zhongshi; Zheng, Weipeng (Journal article; Peer reviewed, 2021)
      The modeling of paleoclimate, using physically based tools, is increasingly seen as a strong out-of-sample test of the models that are used for the projection of future climate changes. New to the Coupled Model Intercomparison ...