Now showing items 207-226 of 1186

    • Dense water formation and circulation in the Barents Sea 

      Årthun, Marius; Ingvaldsen, Randi; Smedsrud, Lars Henrik; Schrum, Corinna (Peer reviewed; Journal article, 2011)
      Dense water masses from Arctic shelf seas are an important part of the Arctic thermohaline system. We present previously unpublished observations from shallow banks in the Barents Sea, which reveal large interannual ...
    • Dense water formation in the Greenland Sea between 1999 and 2009 

      Svingen, Kristin (Master thesis, 2019-08-22)
      A 10-year continuous hydrographic data record from moored profilers located in the central Greenland Sea between 1999 and 2009 were used to examine the mixed-layer depth evolution through winter as well as interannual ...
    • The Departure from Mixed-Layer Similarity During the Afternoon Decay of Turbulence in the Free-Convective Boundary Layer: Results from Large-Eddy Simulations 

      Elguernaoui, Omar; Reuder, Joachim; Li, Dan; Maronga, Bjørn; Bakhoday Paskyabi, Mostafa; Wolf, Tobias; Esau, Igor (Journal article; Peer reviewed, 2023)
      This study analyses the departure of the velocity-variances profiles from their quasi-steady state described by the mixed-layer similarity, using large-eddy simulations with different prescribed shapes and time scales of ...
    • Description and evaluation of the Bergen climate model: ARPEGE coupled with MICOM 

      Furevik, Tore; Bentsen, Mats; Drange, Helge; Kindem, I. K. T.; Kvamstø, Nils Gunnar; Sorteberg, Asgeir (Peer reviewed; Journal article, 2003-07)
      A new coupled atmosphere–ocean–sea ice model has been developed, named the Bergen Climate Model (BCM). It consists of the atmospheric model ARPEGE/IFS, together with a global version of the ocean model MICOM including a ...
    • Design of rectifier system for electric ferries 

      Sagedal, Andreas (Master thesis, 2018-06-16)
      This study investigates the requirements and technologies to provide power from shore to ship when the electric ferry is at quay. Different rectifier systems will be evaluated in terms of requirements given by the utility ...
    • Detection and Timing of Gamma-Ray Pulsations from the 707 Hz Pulsar J0952−0607 

      Nieder, Lars; Clark, Colin J.; Bassa, Cees G.; Wu, Jason; Singh, Avneet; Donner, Julian Y.; Allen, Bruce; Breton, René P.; Dhillon, Vikrram S.; Eggenstein, Heinz Bernd; Hessels, Jason W.T.; Kennedy, Mark R.; Kerr, Matthew; Littlefair, Stuart P.; Marsh, Thomas R.; Sánchez, D. Mata; Papa, Maria Alessandra; Ray, Paul S.; Steltner, Benjamin; Verbiest, Joris P.W. (Journal article; Peer reviewed, 2019)
      The Low-Frequency Array radio telescope discovered the 707 Hz binary millisecond pulsar (MSP) J0952−0607 in a targeted radio pulsation search of an unidentified Fermi gamma-ray source. This source shows a weak energy flux ...
    • The Determination of the Snow Optical Grain Diameter and Snowmelt Area on the Greenland Ice Sheet Using Spaceborne Optical Observations 

      Vandecrux, Baptiste; Box, Jason E.; Wehrlé, Adrien; Kokhanovsky, Alexander A.; Picard, Ghislain; Niwano, Masashi; Hörhold, Maria; Faber, Anne-Katrine; Steen-Larsen, Hans Christian (Journal article; Peer reviewed, 2022)
      The optical diameter of the surface snow grains impacts the amount of energy absorbed by the surface and therefore the onset and magnitude of surface melt. Snow grains respond to surface heating through grain metamorphism ...
    • Developing the Tools to Quantify Past Climate Variability from Ice Core Records 

      Dietrich, Laura Jasmin (Doctoral thesis, 2023-06-21)
      Vannstabile isotoper registrert i iskjerner, brukes som proxydata for å rekonstruere klimaet i fortiden. Tradisjonell tolkning av registrerte vannisotoper er at snø fanger opp den integrerende isotopiske signaturen av ...
    • Development and Comparison of Compressor Models for Heat Pump Applications in TRNSYS 

      Vindenes, Elisabeth (Master thesis, 2018-06-22)
      Heat pump systems may serve as a replacement for many heating systems using fossil fuels for heating purposes. Heat pumps are widely used in Norway where electric energy is abundant and inexpensive. Research and development ...
    • The development and evaluation of an idealized ocean model for the Bergen Dynamic Model 

      Thorsteinsson, Trond (Master thesis, 2013-11-20)
      Three idealized ocean model versions are developed for the Bergen Dynamic Model (Bedymo). All three model versions fall into the category of slab ocean models. One version is more or less a standard slab ocean model, while ...
    • Development of a new urban climate model based on the model PALM – Project overview, planned work, and first achievements 

      Maronga, Bjørn; Gross, Günter; Raasch, Siegfried; Banzhaf, Sabine; Forkel, Renate; Heldens, Wieke; Kanani-Sühring, Farah; Matzarakis, Andreas; Mauder, Matthias; Pavlik, Dirk; Pfafferott, Jens; Schubert, Sebastian; Seckmeyer, Gunther; Sieker, Heiko; Winderlich, Kristina (Journal article; Peer reviewed, 2019)
      In this article we outline the model development planned within the joint project Model-based city planning and application in climate change (MOSAIK). The MOSAIK project is funded by the German Federal Ministry of Education ...
    • Development of an atmospheric chemistry model coupled to the PALM model system 6.0: implementation and first applications 

      Khan, Basit; Banzhaf, Sabine; Chan, Edward C.; Forkel, Renate; Kanani-Sühring, Farah; Ketelsen, Klaus; Kurppa, Mona; Maronga, Bjørn; Mauder, Matthias; Raasch, Siegfried; Russo, Emmanuele; Schaap, Martijn; Sühring, Matthias (Journal article; Peer reviewed, 2021)
      In this article we describe the implementation of an online-coupled gas-phase chemistry model in the turbulence-resolving PALM model system 6.0 (formerly an abbreviation for Parallelized Large-eddy Simulation Model and now ...
    • Development of an automatic thresholding method for wake meandering studies and its application to the data set from scanning wind lidar 

      Krutova, Maria; Paskyabi, Mostafa Bakhoday; Reuder, Joachim; Nielsen, Finn Gunnar (Journal article; Peer reviewed, 2022)
      Wake meandering studies require knowledge of the instantaneous wake evolution. Scanning lidar data are used to identify the wind flow behind offshore wind turbines but do not immediately reveal the wake edges and centerline. ...
    • Development of community, capabilities and understanding through unmanned aircraft-based atmospheric research: The LAPSE-RATE campaign 

      De Boer, Gijs; Diehl, Constantin; Jacob, Jamey; Houston, Adam; Smith, Suzanne; Chilson, Phillip B.; Schmale, David; Intrieri, Janet; Pinto, James; Elston, Jack; Brus, David; Kemppinen, Osku; Clark, Alex; Lawrence, Dale; Bailey, Sean; Sama, Michael; Frazier, Amy; Crick, Christopher; Natalie, Victoria; Pillar-Little, Elizabeth; Klein, Petra; Waugh, Sean; Lundquist, Julie K.; Barbieri, Lindsay; Kral, Stephan; Jensen, Anders; Dixon, Cory; Borenstein, Steven; Hesselius, Daniel; Human, Kathleen; Hall, Philip; Argrow, Brian; Thronberry, Troy; Wright, Randy; Kelly, Jason (Peer reviewed; Journal article, 2020)
      Because unmanned aircraft systems (UAS) offer new perspectives on the atmosphere, their use in atmospheric science is expanding rapidly. In support of this growth, the International Society for Atmospheric Research Using ...
    • Diabatic Heating as a Pathway for Cyclone Clustering Encompassing the Extreme Storm Dagmar 

      Weijenborg, Christian; Spengler, Thomas (Journal article, 2020)
      Contrary to the general notion that extratropical cyclones reduce baroclinicity, the baroclinicity is found to be enhanced in the wake of the extreme winter storm Dagmar. Thus, individual storms can increase baroclinicity, ...
    • Diabatic heating governs the seasonality of the Atlantic Niño 

      Nnamchi, Hyacinth C; Latif, Mojib; Keenlyside, Noel; Kjellsson, Joakim; Richter, Ingo (Journal article; Peer reviewed, 2021)
      The Atlantic Niño is the leading mode of interannual sea-surface temperature (SST) variability in the equatorial Atlantic and assumed to be largely governed by coupled ocean-atmosphere dynamics described by the Bjerknes-feedback ...
    • Diagnosing and Understanding the AMOC Biases in NorESM 

      Ivanova, Detelina; Bentsen, Mats; Ilicak, Mehmet; Gao, Chuncheng; Drange, Helge (Conference poster, 2014)
      We investigate the Atlantic Meridional Overturning Circulation (AMOC) in the Norwegian Earth System Model (NorESM) featuring isopycnal ocean component (MICOM). The Coupled Model Intercomparison Phase 5 (CMIP5) NorESM ...
    • Diagnosing ocean tracer transport from Sellafield and Dounreay by equivalent diffusion and age 

      Orre, Steinar; Gao, Yongqi; Drange, Helge; Deleersnijder, Eric (Peer reviewed; Journal article, 2008-09-27)
      A simple approach for estimating the equivalent diffusion for diagnosing tracer transport is proposed. Two different expressions are derived; one is based directly on an analytical solution of the two-dimensional ...
    • A diagnosis of warm-core and cold-core extratropical cyclone development using the Zwack–Okossi equation 

      Azad, Roohollah; Sorteberg, Asgeir (Peer reviewed; Journal article, 2009)
      In this study, the development of a warm-core and cold-core extratropical cyclone over North Atlantic is examined. The geostrophic relative vorticity tendency used to diagnose the development is calculated utilizing the ...
    • A Diagnostic Diagram to Understand Atmosphere-ocean Dynamics in the Southern North Sea at High Wind Spe 

      Kettle, Anthony (Peer reviewed; Journal article, 2014)
      Long time series of offshore meteorological measurements in the lower marine atmospheric boundary layer show dynamical regimes and variability that are forced partly by interaction with the underlying sea surface and partly ...