Browsing Institutt for geofag by Title

Now showing items 2968-2987 of 3035

  • Variation of thickness, internal structure and petrophysical properties in a deformation band fault zone in siliciclastic rocks 
    Torabi, Anita; Balsamo, Fabrizio; Nogueira, Francisco C.C.; Vasconcelos, David L.; Silva, Amanda C.E.; Bezerra, Francisco H.R.; Souza, Jorge A.B. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    We studied the geometry and petrophysical properties of fault core and damage zones of a deformation band fault zone in the arkosic sandstones of the Cretaceous Antenor Navarro Formation in the Rio do Peixe Basin, Brazil. ...
  • Variations in molecular and isotopes composition of seepage gases in the north-western and south-eastern parts of Lake Baikal 
    Vidishcheva, O; Akhmanov, G.; Kislitsyna, E.; Mazzini, Adriano; Mal’tseva, A.; Poludetkina, E.; Bakay, E.; Man’ko, I.; Korost, D.; Khlystov, Oleg (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    The paper presents results of gas-geochemical studies of bottom sediments and petroleum potential assessment of Baikal Rift Basin. During the expeditions of the Class@Baikal project in 2014–2019, gases from the Lake Baikal ...
  • Varsling av atmosfærisk ising 
    Nygaard, Bjørn Egil Kringlebotn (Master thesis / Masteroppgave, 2006)
    Abstract Supercooled cloud droplets combined with strong wind, can produce heavy ice accretions on unheated structures. It is called ”in-cloud atmospheric icing”, and is a well known problem at high elevations in wintertime. ...
  • Varying regional δ18O–temperature relationship in high-resolution stable water isotopes from east Greenland 
    Holme, Christian; Gkinis, Vasileios; Lanzky, Mika; Morris, Valerie; Olesen, Martin; Thayer, Abigail; Vaughn, Bruce H; Vinther, Bo M. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    This study examines the stable water isotope signal (δ18O) of three ice cores drilled on the Renland peninsula (east Greenland coast). While ice core δ18O measurements qualitatively are a measure of the local temperature ...
  • Vegetation dynamics during the Late Triassic (Carnian-Norian): Response to climate and environmental changes inferred from palynology 
    Baranyi, Viktória (Doctoral thesis / Doktoravhandling, 2018)
    Microscopic plant remains (spores and pollen) allow us to trace vegetation and detect environmental, especially climatic changes from deep time in the geological past. The Late Triassic (237-201 Ma) period is marked by an ...
  • Vegetation type is an important predictor of the arctic summer land surface energy budget 
    Oehri, Jacqueline; Schaepman-Strub, Gabriela; Kim, Jin-Soo; Grysko, Raleigh; Kropp, Heather; Grünberg, Inge; Zemlianskii, Vitalii; Sonnentag, Oliver; Euskirchen, Eugénie S.; Reji Chacko, Merin; Muscari, Giovanni; Blanken, Peter D.; Dean, Joshua F.; di Sarra, Alcide; Harding, Richard J.; Sobota, Ireneusz; Kutzbach, Lars; Plekhanova, Elena; Riihelä, Aku; Boike, Julia; Miller, Nathaniel B.; Beringer, Jason; López-Blanco, Efrén; Stoy, Paul C.; Sullivan, Ryan C.; Kejna, Marek; Parmentier, Frans-Jan W.; Gamon, John A.; Mastepanov, Mikhail; Wille, Christian; Jackowicz-Korczynski, Marcin; Karger, Dirk N.; Quinton, William L.; Putkonen, Jaakko; van As, Dirk; Christensen, Torben R.; Hakuba, Maria Z.; Stone, Robert S.; Metzger, Stefan; Vandecrux, Baptiste; Frost, Gerald V.; Wild, Martin; Hansen, Birger Ulf; Meloni, Daniela; Domine, Florent; te Beest, Mariska; Sachs, Torsten; Kalhori, Aram; Rocha, Adrian V.; Williamson, Scott N.; Morris, Sara; Atchley, Adam L.; Essery, Richard; Runkle, Benjamin R. K.; Holl, David; Riihimaki, Laura D.; Iwata, Hiroki; Schuur, Edward A. G.; Cox, Christopher J.; Grachev, Andrey A.; McFadden, Joseph P.; Fausto, Robert S.; Göckede, Mathias; Ueyama, Masahito; Pirk, Norbert; de Boer, Gijs; Bret-Harte, M. Syndonia; Leppäranta, Matti; Steffen, Konrad; Friborg, Thomas; Ohmura, Atsumu; Edgar, Colin W.; Olofsson, Johan; Chambers, Scott D. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Abstract Despite the importance of high-latitude surface energy budgets (SEBs) for land-climate interactions in the rapidly changing Arctic, uncertainties in their prediction persist. Here, we harmonize SEB observations ...
  • Velocity - Depth trends : a comparison between laboratory and log derived measurements for wells from the Norwegian Shelf 
    Mo, Per (Master thesis / Masteroppgave, 2006)
    Well log derived data and geotechnical core measurement results have been compared.
  • Velocity Anisotropy of shales and sandstones from core sample and well log on the Norwegian Continental shelf 
    Meseret, Malaku (Master thesis / Hovedoppgave, 2008)
    Abstract Velocity anisotropy referse the directional inequality of velocity on the subsurface. Often sedimentary rocks are anisotropic and occurse at all scales from core plugs to reservoirs. In this thesis velocity ...
  • Velocity anisotropy of upper jurassic organic-rich shales, Norwegian continental shelf 
    Koochak Zadeh, Mohammad; Mondol, Nazmul Haque; Jahren, Jens (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    This study investigates the seismic velocity anisotropy of two organic-rich shales from the Norwegian Continental Shelf. The tested organic-rich shale samples were from the Upper Jurassic Draupne and Hekkingen formations ...
  • Venus Evolution Through Time: Key Science Questions, Selected Mission Concepts and Future Investigations 
    Widemann, Thomas; Smrekar, Suzanne E.; Garvin, James B.; Straume-Lindner, Anne Grete; Ocampo, Adriana C.; Schulte, Mitchell D.; Voirin, Thomas; Hensley, Scott; Dyar, M. Darby; Whitten, Jennifer L.; Nunes, Daniel C.; Getty, Stephanie A.; Arney, Giada N.; Johnson, Natasha M.; Kohler, Erika; Spohn, Tilman; O’Rourke, Joseph G.; Wilson, Colin F.; Way, Michael J.; Ostberg, Colby; Westall, Frances; Höning, Dennis; Jacobson, Seth; Salvador, Arnaud; Avice, Guillaume; Breuer, Doris; Carter, Lynn; Gilmore, Martha S.; Ghail, Richard; Helbert, Jörn; Byrne, Paul; Santos, Alison R.; Herrick, Robert R.; Izenberg, Noam; Marcq, Emmanuel; Rolf, Tobias; Weller, Matt; Gillmann, Cedric; Korablev, Oleg; Zelenyi, Lev; Zasova, Ludmila; Gorinov, Dmitry; Seth, Gaurav; Rao, C. V. Narasimha; Desai, Nilesh (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Abstract In this work we discuss various selected mission concepts addressing Venus evolution through time. More specifically, we address investigations and payload instrument concepts supporting scientific goals and open ...
  • A verification of the POP model within CCSM2 : can changes of ocean climate be detected? 
    Åman, Anders Arvid (Master thesis / Masteroppgave, 2007)
    1 Abstract A control run of 150 years for CCSM2 has been performed at the Norwegian Meteorological Institute. In this run the external forcing(especially radiation) were held constant, CO2 were held at the level of 1990. ...
  • The vertical attenuation coefficient of submarine irradiance 
    Aas, Eyvind (Research report / Forskningsrapport, 1976)
  • Vertical mixing and internal wave energy fluxes in a sill fjord 
    Staalstrøm, Andre; Røed, Lars Petter (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
    We consider the distribution and level of local vertical mixing inside of the Drøbak Sill in the Oslofjord, Norway. The work is motivated by observations of long periods (∼years) of hypoxic or even anoxic conditions in the ...
  • Vertical structure and seasonal variability of the inflow to the Lofoten Basin inferred from high resolution Lagrangian simulations 
    Dugstad, Johannes Sandanger; Kozalka, Inga Monika; Isachsen, Pål Erik; Dagestad, Knut-Frode; Fer, Ilker (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    The Lofoten Basin in the eastern Nordic Seas plays a central role in modifying the warm Atlantic Water inflow toward the Arctic Ocean. Here, the Atlantic Water experiences increased residence times, cooling, and substantial ...
  • The vertical structure of currents in Arctic and sub-Arctic regions. 
    Ervik, Karen Augusta Jarstø (Master thesis / Masteroppgave, 2022)
  • Vertical transfer of infrared radiation in water 
    Aas, Eyvind (Research report / Forskningsrapport, 2006)
    An infrared heating lamp has been used as the driving force in laboratory experiments simulating the thermohaline circulation of the world ocean. The radiative energy from the lamp absorbed at different depths in the ...
  • Vertical variation in reservoir core geochemistry : Bitumen samples from a well in the deep and hot Devonian age Embla Oil Field, Offshore Norway 
    Abay, Tesfamariam Berhane (Master thesis / Masteroppgave, 2010)
    A total of 21 core samples from well 2/7-26S of the Embla Field and One reference sample from Oseberg have been geochemically studied. In the studied well the Embla Field consists of two main reservoir units, the Upper and ...
  • Vertically varying Eulerian mean currents induced by internal coastal Kelvin waves 
    Weber, Jan Erik H. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    The lost momentum in spatially damped internal Kelvin waves reappears as Eulerian mean currents through the action of the nonlinear wave-wave interaction terms. A novel expression is derived for the steady balance between ...
  • Vestiges in the Pre-Caledonian Passive Margin of Baltica in the Scandinavian Caledonides: Overview, Revisions and Control on the Structure of the Mountain Belt 
    Andersen, Torgeir Bjørge; Jakob, Johannes; Kjøll, Hans Jørgen; Tegner, Christian (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Abstract: The Pre-Caledonian margin of Baltica has been outlined as a tapering wedge with increas- ing magmatism towards the ocean–continent transition. It is, however, well known that margins are complex, with different ...
  • Virtual wave stress and transient mean drift in spatially damped long interfacial waves 
    Weber, Jan Erik H.; Christensen, Kai Håkon (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    The mean drift in spatially damped long gravity waves at the boundary between two layers of immiscible viscous fluids is investigated theoretically by applying a Lagrangian description of motion. The focus of the paper is ...