Department of Earth Science: Nye registreringer

Viser treff 61-80 av 1046

    • Shallow-water hydrothermal venting linked to the Palaeocene–Eocene Thermal Maximum 

      Berndt, Christian; Planke, Sverre; Alvarez Zarikian, Carlos A.; Frieling, Joost; Jones, Morgan Thomas; Millett, John M.; Brinkhuis, Henk; Bünz, Stefan; Svensen, Henrik Hovland; Longman, Jack; Scherer, Reed P.; Karstens, Jens; Manton, Ben; Nelissen, Mei; Reed, Brandon; Faleide, Jan Inge; Huismans, Ritske Sipke; Agarwal, Amar; Andrews, Graham D.M.; Betlem, Peter; Bhattacharya, Joyeeta; Chatterjee, Sayantani; Christopoulou, Marialena; Clementi, Vincent J.; Ferré, Eric C.; Filina, Irina Y.; Guo, Pengyuan; Harper, Dustin T.; Lambart, Sarah; Mohn, Geoffroy; Nakaoka, Reina; Tegner, Christian; Varela, Natalia; Wang, Mengyuan; Xu, Weimu; Yager, Stacy L. (Journal article; Peer reviewed, 2023)
      The Palaeocene–Eocene Thermal Maximum (PETM) was a global warming event of 5–6 °C around 56 million years ago caused by input of carbon into the ocean and atmosphere. Hydrothermal venting of greenhouse gases produced in ...

    • Volcanic evolution of an ultraslow-spreading ridge 

      Stubseid, Håvard Hallås; Bjerga, Anders; Haflidason, Haflidi; Pedersen, Leif-Erik Rydland; Pedersen, Rolf B. (Journal article; Peer reviewed, 2023)
      Nearly 30% of ocean crust forms at mid-ocean ridges where the spreading rate is less than 20 mm per year. According to the seafloor spreading paradigm, oceanic crust forms along a narrow axial zone and is transported away ...

    • Did the Eurasian ice sheets melt completely in early Marine Isotope Stage 3? New evidence from Norway and a synthesis for Eurasia 

      Mangerud, Jan; Alexanderson, Helena; Birks, Hilary H; Paus, Aage; Perić, Zoran M.; Svendsen, John Inge (Journal article; Peer reviewed, 2023)
      We describe glaci-lacustrine sediments buried under thick tills in Folldalen, south-east Norway, a site located close to the former centre of the Scandinavian Ice Sheet. Thus, the location implies that the ice sheet had ...

    • Deep-water sand transfer by hyperpycnal flows, the Eocene of Spitsbergen, Arctic Norway 

      Grundvåg, Sten-Andreas; Helland-Hansen, William; Johannessen, Erik P.; Eggenhuisen, Joris T.; Pohl, Florian; Spychala, Yvonne T. (Journal article; Peer reviewed, 2023)
      Flood-generated hyperpycnal flows are dense, sediment-laden, turbulent flows that can form long-lived, bottom-hugging turbidity currents, which undoubtedly transport large volumes of fine-grained sediments into the ocean. ...

    • A continent-wide detailed geological map dataset of Antarctica 

      Cox, Simon C.; Lyttle, Belinda Smith; Elkind, Samuel; Siddoway, Christine S.; Morin, Paul; Capponi, Giovanni; Abu-Alam, Tamer; Ballinger, Matilda; Bamber, Lauren; Kitchener, Brett; Lelli, Luigi; Mawson, Jasmine; Millikin, Alexie; Dal Seno, Nicola; Whitburn, Louis; White, Tristan; Burton-Johnson, Alex; Crispini, Laura; Elliot, David; Elvevold, Synnøve; Goodge, John; Halpin, Jacqueline; Jacobs, Joachim; Martin, Adam P.; Mikhalsky, Eugene; Morgan, Fraser; Phil, Scadden; Smellie, John; Wilson, Gary (Journal article; Peer reviewed, 2023)
      A dataset to describe exposed bedrock and surficial geology of Antarctica has been constructed by the GeoMAP Action Group of the Scientific Committee on Antarctic Research (SCAR) and GNS Science. Our group captured existing ...

    • An integrated deep learning and object-based image analysis approach for mapping debris- covered glaciers 

      Thomas, Daniel Jack; Robson, Benjamin Aubrey; Racoviteanu, Adina E. (Journal article; Peer reviewed, 2023)
      Evaluating glacial change and the subsequent water stores in high mountains is becoming increasingly necessary, and in order to do this, models need reliable and consistent glacier data. These often come from global ...

    • Impact of icebergs on the seasonal submarine melt of Sermeq Kujalleq 

      Kajanto, Karita; Straneo, Fiammetta; Nisancioglu, Kerim Hestnes (Journal article; Peer reviewed, 2023)
      The role of icebergs in narrow fjords hosting marine-terminating glaciers in Greenland is poorly understood, even though iceberg melt results in a substantial freshwater flux that can exceed the subglacial discharge. ...

    • Global scale analysis on the extent of river channel belts 

      Nyberg, Björn Johan Emil Burr; Henstra, Gijs Allard; Gawthorpe, Rob; Ravnås, Rodmar; Ahokas, Juha Matti (Journal article; Peer reviewed, 2023)
      Rivers form channel belts that encompass the area of the river channel and its associated levees, bars, splays and overbank landforms. The channel belt is critical for understanding the physical river evolution through ...

    • Unraveling the mechanisms and implications of a stronger mid-Pliocene Atlantic Meridional Overturning Circulation (AMOC) in PlioMIP2 

      Weiffenbach, Julia E.; Baatsen, Michiel L. J.; Dijkstra, Henk A.; Von Der Heydt, Anna S.; Abe-Ouchi, Ayako; Brady, Esther C.; Chan, Wing-Le; Chandan, Deepak; Chandler, Mark A.; Contoux, Camille; Feng, Ran; Guo, Chuncheng; Han, Zixuan; Haywood, Alan M.; Li, Qiang; Li, Xiangyu; Lohmann, Gerrit; Lunt, Daniel J.; Nisancioglu, Kerim Hestnes; Otto-Bliesner, Bette L.; Peltier, W. Richard; Ramstein, Gilles; Sohl, Linda E.; Stepanek, Christian; Tan, Ning; Tindall, Julia C.; Williams, Charles J. R.; Zhang, Qiong; Zhang, Zhongshi (Journal article; Peer reviewed, 2023)
      The mid-Pliocene warm period (3.264–3.025 Ma) is the most recent geological period in which the atmospheric CO2 concentration was approximately equal to the concentration we measure today (ca. 400 ppm). Sea surface temperature ...

    • Analysis of storm surge events along the Norwegian coast 

      Wolf, Tobias; Outten, Stephen; Mangini, Fabio; Chen, Linling; Nilsen, Jan Even Øie (Journal article; Peer reviewed, 2023-02-08)
      Observed extreme sea levels are caused by a combination of extreme astronomical tide and extreme storm surge, or by an extreme value in one of these variables and a moderate value in the other. We analyzed measurements ...

    • Paleoenvironmental and diagenetic evolution of the Aptian Pre-Salt succession in Namibe Basin (Onshore Angola) 

      Moragas, Mar; Baqués, Vinyet; Martín-Martín, Juan Diego; Sharp, Ian R.; Lapponi, Fabio; Hunt, David W.; Zeller, Michael; Vergés, Jaume; Messager, Grégoire; Gindre-Chanu, Laurent; Swart, Roger; Machado, Vladimir (Journal article; Peer reviewed, 2023)
      The Aptian Pre-Salt sedimentary succession cropping out in Cangulo palaeovalley onshore Namibe Basin (Angola) was studied by a combination of field and analytical techniques to constrain the sedimentary and diagenetic ...

    • Ocean–Ice Sheet Coupling in the Totten Glacier Area, East Antarctica: Analysis of the Feedbacks and Their Response to a Sudden Ocean Warming 

      Van Achter, Guillian; Fichefet, Thierry; Goosse, Hugues; Pelletier, Charles; Haubner, Konstanze; Pattyn, Frank (Journal article; Peer reviewed, 2023-04-01)
      We coupled together high-resolution versions of the ocean–sea ice model NEMO and the ice sheet model BISICLES configured to the Totten Glacier area and ran a series of simulations over the recent past (1995–2014) and under ...

    • North Atlantic surface ocean warming and salinization in response to middle Eocene greenhouse warming 

      van der Ploeg, Robin; Cramwinckel, Margot J.; Kocken, Ilja J.; Leutert, Thomas Jan; Bohaty, Steven M.; Fokkema, Chris D.; Hull, Pincelli M.; Meckler, Anna Nele; Middelburg, Jack J.; Müller, Inigo A.; Penman, Donald E.; Peterse, Francien; Reichart, Gert-Jan; Sexton, Philip F.; Vahlenkamp, Maximilian; De Vleeschouwer, David; Wilson, Paul A.; Ziegler, Martin; Sluijs, Appy (Journal article; Peer reviewed, 2023)
      Quantitative reconstructions of hydrological change during ancient greenhouse warming events provide valuable insight into warmer-than-modern hydrological cycles but are limited by paleoclimate proxy uncertainties. We ...

    • Atlantic circulation changes across a stadial-interstadial transition 

      Waelbroeck, Claire; Tjiputra, Jerry; Guo, Chuncheng; Nisancioglu, Kerim Hestnes; Jansen, Eystein; Vazquez Riveiros, Natalia; Toucanne, Samuel; Eynaud, Frederique; Rossignol, Linda; Dewilde, Fabien; Marchès, Elodie; Lebreiro, Susana; Nave, Silvia (Journal article; Peer reviewed, 2023)
      We combine consistently dated benthic carbon isotopic records distributed over the entire Atlantic Ocean with numerical simulations performed by a glacial configuration of the Norwegian Earth System Model with active ocean ...

    • The Moho Architecture and Its Role for Isostasy—Insights From the Lofoten-Vesterålen Rifted Margin, Norway 

      Schiffer, Christian; Rondenay, Stephane; Ottemöller, Lars; Drottning, Anne Furubotten (Journal article; Peer reviewed, 2023)
      The crustal structure of the Nordland and Troms region, Norway, has received growing scientific attention because (a) the region is one of the most seismically active areas of mainland Norway, and (b) there are differing ...

    • West Spitsbergen fold and thrust belt: A digital educational data package for teaching structural geology 

      Horota, Rafael Kenji; Senger, Kim; Rodes, Nil; Betlem, Peter; Smyrak-Sikora, Aleksandra; Jonassen, Marius Opsanger; Kramer, Daniel; Braathen, Alvar (Journal article; Peer reviewed, 2023)
      The discipline of structural geology is taking an advantage of compiling observations from multiple field sites to comprehend the bigger picture and constrain the region's geological evolution. In this study we demonstrate ...

    • Full Waveform Inversion and Multi-Diagonal Inversion for Monitoring of CO2 Storage at Sleipner 

      Vidstein, Kristina Engelsen (Master thesis, 2023-06-01)
      Carbon capture and storage (CCS) can become necessary for mitigating climate change. However, storing CO2 in subsurface reservoirs requires thorough monitoring. The most accurate and widespread type of monitoring is seismic ...

    • Microseismic Waveform Modeling and Inversion using Finite-Difference and Global Optimization 

      Eide, Torstein Jacobsen (Master thesis, 2023-06-01)
      Estimating microseismic source parameters is an essential part of a microseismic monitoring project. Typically the microseismic source position and origin time are estimated utilizing kinematic methods, while the moment ...

    • Stratigraphic and Tectonic development of the Nyk High 

      Eriksen, Jahn Brusdal (Master thesis, 2023-06-01)
      This thesis aims to develop a holistic model of the stratigraphical and tectonic development of the Nyk High structure in the Northern Vøring Basin, explicitly focusing on the Cretaceous-Paleocene transition. The thesis ...

    • Miljøkonsekvenser av tidligere gruvedrift på Litlabø, Stord 

      Lund, Anders (Master thesis, 2023-06-01)
      Gruvedrift medfører miljøutfordringer, der håndteringen av sulfidholdige overskuddsmasser er spesielt utfordrende siden oksidering og forvitring av disse massene ofte medfører sur avrenning og utlekking av miljøskadelige ...