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  • Regional, seasonal, and predictable Arctic sea ice change 

    Onarheim, Ingrid Husøy (The University of Bergen, 2017-12-07)
    The loss of Arctic sea ice is one of the most prominent and best quantified indicators of ongoing global climate change. Satellite passive microwave observations since 1979 indicate significant negative sea ice extent ...
    Doctoral thesis
  • Toward an ice-free Barents Sea 

    Onarheim, Ingrid Husøy; Årthun, Marius (American Geophysical Union, 2017)
    Arctic winter sea ice loss is most pronounced in the Barents Sea. Here we combine observations since 1850 with climate model simulations to examine the recent record low winter Barents Sea ice extent. We find that the ...
    Journal article
  • Langmuir Turbulence in the HYCOM Ocean Model 

    Malila, Mika Petteri (The University of Bergen, 2018-01-19)
    The impact of parameterising the turbulent mixing induced by surface wave-driven Langmuir turbulence is investigated for a basin-scale configuration of the hybrid-coordinate ocean circulation model HYCOM. Two-year, ...
    Master thesis
  • The red-sky enigma over Svalbard in December 2002 

    Sigernes, Fred; Lloyd, N.; Lorentzen, Dag Arne; Neuber, R.; Hoppe, U.-P.; Degenstein, D.; Shumilov, N.; Moen, Jøran Idar; Gjessing, Yngvar; Havnes, Ove; Skartveit, Arvid; Raustein, Elmer; Ørbæk, J.B.; Deehr, CS (European Geosciences Union, 2005)
    On 6 December 2002, during winter darkness, an extraordinary event occurred in the sky, as viewed from Longyearbyen (78° N, 15° E), Svalbard, Norway. At 07:30 UT the southeast sky was surprisingly lit up in a deep red ...
    Journal article
  • Energy Storage in the Distribution Grid 

    Kjerpeset, Sven-Arild (The University of Bergen, 2017-12-23)
    The implementation of distributed energy storage will play a vital role in the Smart Grid of the future, which is the merging of IT and the electrical power grid. With the increasing penetration of distributed energy ...
    Master thesis
  • The Northeast Greenland shelf as a potential habitat for the Northeast Arctic cod 

    Strand, Kjersti Opstad; Sundby, Svein; Albretsen, Jon; Vikebø, Frode Bendiksen (Frontiers, 2017-09-26)
    Observations (1978–1991) of distributions of pelagic juvenile Northeast Arctic cod (Gadus morhua L.) show that up to 1/3 of the year class are dispersed off the continental shelf and into the deep Norwegian Sea while on ...
    Journal article
  • Et dynamisk studium av stormen Narve - et kaldluftsutbrudd i Finnmark - ved hjelp av observasjoner og numeriske simuleringer 

    Samuelsen, Eirik Mikal (The University of Bergen, 2007)
    Title: "A dynamical study of the storm Narve - a cold air outbreak in Finnmark - with the use of observations and numerical simulations."During the storm Narve in January 2006 strong winds from land were blowing during ...
    Master thesis
  • Trends and drivers in global surface ocean pH over the past 3 decades 

    Lauvset, Siv Kari; Gruber, Nicolas; Landschützer, Peter; Olsen, Are; Tjiputra, Jerry (Copernicus Publications, 2015-03-02)
    We report global long-term trends in surface ocean pH using a new pH data set computed by combining fCO2 observations from the Surface Ocean CO2 Atlas (SOCAT) version 2 with surface alkalinity estimates based on temperature ...
    Journal article
  • Long-term trends in surface ocean pH in the North Atlantic 

    Lauvset, Siv Kari; Gruber, Nicolas (Elsevier, 2014-05)
    Presently available direct pH measurements do not have a sufficient data density in space or time in order to determine long-term trends across wider geographic regions, limiting our ability to assess the magnitude and ...
    Journal article
  • A new global interior ocean mapped climatology: the 1° ×  1° GLODAP version 2 

    Lauvset, Siv Kari; Key, Robert M.; Olsen, Are; van Heuven, Steven; Velo, Antón; Lin, Xiaohua; Schirnick, Carsten; Kozyr, Alex; Tanhua, Toste; Hoppema, Mario; Jutterström, Sara; Steinfeldt, Reiner; Jeansson, Emil; Ishii, Masao; Pérez, Fiz F.; Suzuki, Toru; Watelet, Sylvain (Copernicus Publications, 2016-08-15)
    We present a mapped climatology (GLODAPv2.2016b) of ocean biogeochemical variables based on the new GLODAP version 2 data product (Olsen et al., 2016; Key et al., 2015), which covers all ocean basins over the years 1972 ...
    Journal article
  • Open-source sea ice drift algorithm for Sentinel-1 SAR imagery using a combination of feature tracking and pattern matching 

    Muckenhuber, Stefan; Sandven, Stein (Copernicus Publications, 2017-08-07)
    An open-source sea ice drift algorithm for Sentinel-1 SAR imagery is introduced based on the combination of feature tracking and pattern matching. Feature tracking produces an initial drift estimate and limits the search ...
    Journal article
  • Validation of boundary layer parameterization schemes in the Weather Research and Forecasting Model (WRF) under the aspect of offshore wind energy applications - Part II: Boundary layer height and atmospheric stability 

    Krogsæter, Olav; Reuder, Joachim (Wiley, 2015-07)
    Five different planetary boundary layer (PBL) schemes in the Weather Research and Forecasting (WRF) model have been tested with respect to their capability to model boundary layer parameters relevant for offshore wind ...
    Journal article
  • Sea ice thermohaline dynamics and biogeochemistry in the Arctic Ocean: Empirical and model results 

    Duarte, Pedro; Meyer, Amelie; Olsen, Lasse Mork; Kauko, Hanna Maria; Assmy, Philipp; Rösel, Anja; Itkin, Polona; Hudson, Stephen R.; Granskog, Mats A.; Gerland, Sebastian; Sundfjord, Arild; Steen, Harald; Hop, Haakon; Cohen, Lana; Peterson, Algot Kristoffer; Jeffery, Nicole; Elliott, Scott M.; Hunke, Elizabeth Clare; Turner, Adrian K. (American Geophysical Union, 2017-07)
    Large changes in the sea ice regime of the Arctic Ocean have occurred over the last decades justifying the development of models to forecast sea ice physics and biogeochemistry. The main goal of this study is to evaluate ...
    Journal article
  • Open-source feature-tracking algorithm for sea ice drift retrieval from Sentinel-1 SAR imagery 

    Muckenhuber, Stefan; Korosov, Anton Andreevich; Sandven, Stein (Copernicus Publications, 2016-04-26)
    A computationally efficient, open-source feature-tracking algorithm, called ORB, is adopted and tuned for sea ice drift retrieval from Sentinel-1 SAR (Synthetic Aperture Radar) images. The most suitable setting and parameter ...
    Journal article
  • Operational algorithm for ice–water classification on dual-polarized RADARSAT-2 images 

    Zakhvatkina, Natalia; Korosov, Anton; Muckenhuber, Stefan; Sandven, Stein; Babiker, Mohamed (Copernicus Publications, 2017-01-11)
    Synthetic Aperture Radar (SAR) data from RADARSAT-2 (RS2) in dual-polarization mode provide additional information for discriminating sea ice and open water compared to single-polarization data. We have developed an automatic ...
    Journal article
  • High resolution sea ice monitoring using space borne Synthetic Aperture Radar 

    Muckenhuber, Stefan (The University of Bergen, 2017-12-06)
    Sea ice represents a major factor in the climate system and updated knowl- edge about sea ice conditions is important for shipping and offshore industry, local communities and others. Due to its remote location and ...
    Doctoral thesis
  • Effects of sea-ice and biogeochemical processes and storms on under-ice water fCO2 during the winter-spring transition in the high Arctic Ocean: Implications for sea-air CO2 fluxes 

    Fransson, Agneta Ingrid; Chierici, Melissa; Skjelvan, Ingunn; Olsen, Are; Assmy, Philipp; Peterson, Algot Kristoffer; Spreen, Gunnar; Ward, Brian (American Geophysical Union, 2017-07)
    We performed measurements of carbon dioxide fugacity (fCO2) in the surface water under Arctic sea ice from January to June 2015 during the Norwegian young sea ICE (N-ICE2015) expedition. Over this period, the ship drifted ...
    Journal article
  • Leads in Arctic pack ice enable early phytoplankton blooms below snow-covered sea ice 

    Assmy, Philipp; Fernández-Méndez, Mar; Duarte, Pedro; Meyer, Amelie; Randelhoff, Achim; Mundy, Christopher John; Olsen, Lasse; Kauko, Hanna M.; Bailey, Allison; Chierici, Melissa; Cohen, Lana; Doulgeris, Anthony Paul; Ehn, Jens K.; Fransson, Agneta; Gerland, Sebastian; Hop, Haakon; Hudson, Stephen R.; Hughes, Nick; Itkin, Polona; Johnsen, Geir; King, Jennifer A.; Koch, Boris P.; Koenig, Zoe; Kwasniewski, Slawomir; Laney, Samuel R.; Nikolaus, Marcel; Pavlov, Alexey K.; Polashenski, Christopher M.; Provost, Christine; Rösel, Anja; Sandbu, Marthe; Spreen, Gunnar; Smedsrud, Lars H.; Sundfjord, Arild; Taskjelle, Torbjørn; Tatarek, Agnieszka; Wiktor, Josef; Wagner, Penelope Mae; Wold, Anette; Steen, Harald; Granskog, Mats A. (Nature Publishing Group, 2017-01-19)
    The Arctic icescape is rapidly transforming from a thicker multiyear ice cover to a thinner and largely seasonal first-year ice cover with significant consequences for Arctic primary production. One critical challenge is ...
    Journal article
  • Stratified flow over complex topography: A model study of the bottom drag and associated mixing 

    Seim, Knut Sponheim; Fer, Ilker; Avlesen, Helge (Elsevier, 2012-02)
    The flow of stratified fluid over complex topography may lead to a significant drag on the fluid, exerted by the bottom obstacles. Using a 2-m resolution, three-dimensional, non-hydrostatic numerical ocean model, the drag ...
    Journal article
  • New layer thickness parameterization of diffusive convection in the ocean 

    Zhou, Sheng-Qi; Lu, Yuan-Zheng; Song, Xue-Long; Fer, Ilker (Elsevier, 2016-03)
    In the present study, a new parameterization is proposed to describe the convecting layer thickness in diffusive convection. By using in situ observational data of diffusive convection in the lakes and oceans, a wide range ...
    Journal article

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