Now showing items 268-287 of 452

    • Observational validation of the diffusive convection flux laws in the Amundsen Basin, Arctic Ocean 

      Guthrie, John D.; Fer, Ilker; Morison, James H. (American Geophysical Union, 2015-12)
      The low levels of mechanically driven mixing in many regions of the Arctic Ocean make double diffusive convection virtually the only mechanism for moving heat up from the core of Atlantic Water towards the surface. In an ...
      Journal article
    • Observations of barotropic oscillations and their influence on mixing in the Faroe bank channel overflow region 

      Darelius, Elin Maria K.; Ullgren, Jenny; Fer, Ilker (American Meteorological Society, 2013)
      Observations of hydrography, currents, and microstructure are presented together with sea surface height (SSH) patterns from concurrent satellite tracks to describe the subinertial oscillations in the region downstream of ...
      Journal article
    • Observations of brine plumes below Arctic sea ice 

      Peterson, Algot Kristoffer (European Geosciences Union, 2017)
      In sea ice, interconnected pockets and channels of brine are surrounded by fresh ice. Over time, brine is lost by gravity drainage and flushing. The timing of salt release and its interaction with the underlying water can ...
      Journal article
    • Observations of the Storfjorden overflow 

      Fer, Ilker; Skogseth, Ragnheid; Haugan, Peter Mosby (Elsevier, 2003)
      The mixing and spreading of the Storfjorden overflow were investigated with density and horizontal velocity profiles collected at closely spaced stations. The dense bottom water generated by strong winter cooling, enhanced ...
      Journal articlePeer reviewed
    • Observed anomalous atmospheric patterns in summers of unusual Arctic sea icemelt 

      Knudsen, Erlend Moster (WileyAmerican Geophysical Union, 2015-04-16)
      The Arctic sea ice retreat has accelerated over the last decade. The negative trend is largest in summer, but substantial interannual variability still remains. Here we explore observed atmospheric conditions and feedback ...
      Journal article
    • Observed vulnerability of Filchner-Ronne Ice Shelf to wind-driven inflow of warm deep water 

      Darelius, Elin Maria K.; Fer, Ilker; Nicholls, Keith W. (Nature Publishing Group, 2016-08-02)
      The average rate of melting at the base of the large Filchner-Ronne Ice Shelf in the southern Weddell Sea is currently low, but projected to increase dramatically within the next century. In a model study, melt rates ...
      Journal article
    • Ocean abyssal carbon experiments at 0.7 and 4 km depth 

      Haugan, Peter Mosby; Brewer, Peter G.; Peltzer, Edward T.; Walz, Peter; Aya, Izuo; Yamane, Kenji; Kojima, Ryuji; Nakajima, Yasuharu; Nakayama, Noriko; Hove, Joakim; Johannessen, Truls; Bellerby, Richard G. J.; Alendal, Guttorm (Elsevier, 2005)
      Observations from small-scale (20 to 90 litres) CO2 experiments conducted off the coast of California at 684 m depth and at 3942 m depth are discussed. In both experiments, when the seawater velocity was sufficiently strong, ...
      Journal article
    • Ocean acidication in the Arabian Sea and the Red Sea - factors controlling pH 

      Omer, Waleed Mahmood M. Ahme (The University of Bergen, 2010-06-01)
      The CO2 increase in the ocean due to uptake of anthropogenic CO2 and the companying lowering of ocean pH is of major concern. In this study we investigated the variability of CO2 system parameters, focusing particularly ...
      Master thesis
    • Ocean acidification in the subpolar North Atlantic: rates and mechanisms controlling pH changes 

      García-Ibáñez, Maribel I.; Zunino, Patricia; Fröb, Friederike; Carracedo, Lidia I.; Ríos, Aida F.; Mercier, Herlé; Olsen, Are; Pérez, Fiz F. (European Geosciences Union, 2016-06-23)
      Repeated hydrographic sections provide critically needed data on and understanding of changes in basin-wide ocean CO2 chemistry over multi-decadal timescales. Here, high-quality measurements collected at twelve cruises ...
      Journal article
    • The ocean carbon sink - impacts, vulnerabilities and challenges 

      Heinze, Christoph; Meyer, Stefanie; Goris, Nadine; Anderson, Leif; Steinfeldt, Rainer; Chang, Nicolette; Le Quéré, Corinne; Bakker, Dorothée C.E. (Copernicus Publications, 2015-06-09)
      Carbon dioxide (CO2) is, next to water vapour, considered to be the most important natural greenhouse gas on Earth. Rapidly rising atmospheric CO2 concentrations caused by human actions such as fossil fuel burning, land-use ...
      Journal article
    • Ocean circulation and climate at the Eemian and last glacial inception 

      Born, Andreas (The University of Bergen, 2010-09-24)
      Combining a hierarchy of climate models of varying complexity with marine proxy data, we show that the North Atlantic surface circulation played an important role for the climate of the Eemian and the last glacial ...
      Doctoral thesis
    • Ocean internal wave spectra inferred from seismic reflection transects 

      Holbrook, W. Steven; Fer, Ilker (American Geophysical Union, 2005-08-06)
      Internal waves affect many important dynamical processes in the ocean, but in situ observations of internal waves are infrequent and spatially sparse. Here we show that remote sensing of internal waves by marine seismic ...
      Journal articlePeer reviewed
    • Ocean storage 

      Caldeira, Ken; Akai, Makoto; Brewer, Peter G.; Chen, Baixin; Haugan, Peter Mosby; Iwama, Toru; Johnston, Paul; Kheshgi, Haroon; Li, Qingquan; Ohsumi, Takashi; Pörtner, Hans; Sabine, Chris; Shirayama, Yoshihisa; Thomson, Jolyon (Intergovermental Panel on Climate Change, 2005)
    • Ocean Thermal Energy Conversion 

      Olsen, Leif Mathias Aas (The University of Bergen, 2016-05-31)
      På grunn av verdens stadig økende behov for energi, samtidig som klimaproblemene har økt er det tydelig at flere tiltak må iverksettes. Ocean Thermal Energy Conversion er lovende fornybar energiteknologi som kan være ...
      Master thesis
    • Offshore Wind Farm Wake Effect on Stratification and Coastal Upwelling 

      Bakhoday Paskyabi, Mostafa (Elsevier Ltd., 2015-12-02)
      In this study, the interactions between an offshore wind farm, upper-ocean currents, and stratification are examined under shallow water conditions from a two-dimensional modeling standpoint. The modeling results from two ...
      Journal article
    • On Mixed Wind-Sea/Swell Conditions in the Open Ocean : Model and Radar-Observations 

      Aarnes, Ole Johan (The University of Bergen, 2005)
      Master thesis
    • On radar imaging of current features: 1. Model and comparison with observations 

      Kudryavtsev, Vladimir; Akimov, D.; Johannessen, Johnny A.; Chapron, B. (American Geophysical Union, 2005-07-22)
      A new radar imaging model of ocean current features is proposed. The simulated normalized radar cross section (NRCS) takes into account scattering from ‘‘regular’’ surfaces (by means of resonant Bragg scattering and ...
      Journal article
    • On radar imaging of current features: 2. Mesoscale eddy and current front detection 

      Johannessen, Johnny A.; Kudryavtsev, Vladimir; Akimov, D.; Eldevik, Tor; Winther, Nina Gjerde; Chapron, B. (American Geophysical Union, 2005-07-22)
      The surface signatures of meandering fronts and eddies have been regularly observed and documented in synthetic aperture radar (SAR) images. Wave-current interactions, the suppression of short wind waves by natural film, ...
      Journal articlePeer reviewed
    • On the effect of topography and wind on warm water inflow— An idealized study of the southern Weddell Sea continental shelf system 

      Daae, Kjersti; Hattermann, Tore; Darelius, Elin Maria K.; Fer, Ilker (Wiley, 2017-03)
      An idealized eddy-resolving numerical model, with topographic features common to the southern Weddell Sea, is constructed to study mechanisms through which warm deep water enters a wide continental shelf with a trough. The ...
      Journal article
    • On the Influence of Latent and Sensible Heating for Maintaining Baroclinicity in the Gulf Stream Region 

      Dahl-Eriksen, Ståle (The University of Bergen, 2016-06-01)
      For the North Atlantic storm track to collocate with the ocean front, there has to be efficient restoring mechanisms for baroclinicity. The total diabatic heating is agreed to play the most dominant role, but whether ...
      Master thesis