Now showing items 88-107 of 411

    • Diurnal Circulation of the Bolivan Altiplano. Part I: Observations 

      Egger, Joseph; Blacutt, Luis; Ghezzi, Flavio; Heinrich, Richard; Kolb, Philip; Lämmlein, Stephan; Leeb, Martin; Mayer, Stephanie; Palenque, Eduardo; Reuder, Joachim; Schäper, Wolfgang; Schween, Jan; Torrez, Rene; Zaratti, Francesco (American Meteorological Society, 2005-04)
      In July and August 2003 a field campaign was conducted to explore the diurnal circulation of the Bolivian Altiplano. Vertical soundings by remote-controlled aircraft yielded profiles of temperature, pressure, and humidity ...
      Journal article
    • Downslope windstorm in Iceland –WRF/MM5 model comparison 

      Rögnvaldsson, Ólafur; Bao, J. W.; Ágústsson, Hálfdán; Ólafsson, Haraldur (European Geosciences Union, 2011-01-05)
      A severe windstorm downstream of Mt. Öræfajökull in Southeast Iceland is simulated on a grid of 1 km horizontal resolution by using the PSU/NCAR MM5 model and the Advanced Research WRF model. Both models are run with ...
      Peer reviewedJournal article
    • Drag coefficient reduction at very high wind speeds 

      Bye, John A. T.; Jenkins, Alastair D. (American Geophysical Union, 2006-03-31)
      The correct representation of the 10-m drag coefficient for momentum (K10) at extreme wind speeds is very important for modeling the development of tropical depressions and may also be relevant to the understanding of ...
      Journal articlePeer reviewed
    • The dynamic and thermodynamic structure of monsoon low-pressure systems during extreme rainfall events 

      Sørland, Silje Lund; Sorteberg, Asgeir (Co-Action Publishing, 2015-08-12)
      A cyclone-tracking algorithm is used to identify monsoon low-pressure systems (LPS) in the ERA-interim re-analysis (1979–2010). The LPS that are connected to observed extreme rainfall events are picked out and studied with ...
      Journal article
    • The dynamic and thermodynamic structure of monsoon low-pressure systems during extreme rainfall events 

      Sørland, Silje Lund; Sorteberg, Asgeir (Co-action publishing, 2015-08-12)
      A cyclone-tracking algorithm is used to identify monsoon low-pressure systems (LPS) in the ERA-interim re-analysis (1979–2010). The LPS that are connected to observed extreme rainfall events are picked out and studied with ...
      Journal article
    • Dynamical downscaling of ERA-40 in complex terrain using the WRF regional climate model 

      Heikkilä, Ulla Elina; Sandvik, Anne Dagrun; Sorteberg, Asgeir (Springer, 2010)
      Results from a first-time employment of the WRF regional climate model to climatological simulations in Europe are presented. The ERA-40 reanalysis (resolution 1 ) has been downscaled to a horizontal resolution of 30 ...
      Peer reviewedJournal article
    • Dynamical Perspectives on the Formation and Intensification of Polar Lows 

      Terpstra, Annick (The University of Bergen, 2014-11-25)
      This thesis consists of a collection of scientific publications addressing dynamical aspects of the formation and intensification of polar lows. Polar lows are small scale, intense, short-lived cyclones developing over ...
      Doctoral thesis
    • Dynamically combining climate models to "supermodel" the tropical Pacific 

      Shen, Mao-Lin; Keenlyside, Noel; Selten, Frank; Wiegerinck, Wim; Duane, Gregory (Wiley, 2016-01)
      We construct an interactive ensemble of two different climate models to improve simulation of key aspects of tropical Pacific climate. Our so-called supermodel is based on two atmospheric general circulation models (AGCMs) ...
      Journal article
    • Dynamics and Predictability of the Extreme Extratropical Cyclone Nina 

      Selberg, Lars Andreas Norheim (The University of Bergen, 2016-06-01)
      An extreme extratropical cyclone struck western Norway at 12 UTC 10 January 2015 causing significant damage to property due to extreme winds. The European region has a history of being struck by extreme cyclones that cause ...
      Master thesis
    • Dynamics of a CO2-seawater interface in the deep ocean 

      Hove, Joakim; Haugan, Peter Mosby (Sears Foundation for Marine Research, 2005)
      A trough filled with liquid CO2 located at 3940 m depth has been used as a model system for CO2 deposition on the seafloor. To study the intrinsic properties of the interface between CO2 and seawater a wave maker was used ...
      Journal article
    • The Dynamics of the East Madagascar Current System and Its Influence on the Biological Production Associated to the Shelf - An Observational Study 

      Voldsund, Aksel (The University of Bergen, 2011-06-01)
      The dynamics of the East Madagascar Current (EMC) system, and its influence on the biological production associated to the shelf, is studied by using cruise-data collected onboard the Norwegian R/V. Dr. Fridtjof Nansen ...
      Master thesis
    • The East Greenland Current studied with CFCs and released sulphur hexafluoride 

      Olsson, K. Anders; Jeansson, Emil; Tanhua, Toste; Gascard, Jean-Claude (Elsevier, 2005-03)
      The distribution and evolution of water masses along the East Greenland Current (EGC) from south of the Fram Strait to the Denmark Strait were investigated using chlorofluorocarbons (CFCs) and the released tracer sulphur ...
      Journal article
    • The East Greenland Current: Structure and Variability 

      Gaardsted, Frank (The University of Bergen, 2004)
      Master thesis
    • Eddy Structure and Dynamics in the Mozambique Channel 

      Vassele, Valentina Joaquina (The University of Bergen, 2010-06-01)
      Abstract The Mozambique Channel circulation is dominated by a sequence of southward migrating cyclonic and anticyclonic eddies and previous studies have been done to investigate the flow, the variability and nature of the ...
      Master thesis
    • Eddy-resolving simulations of the Fimbul Ice Shelf cavity circulation: Basal melting and exchange with open ocean 

      Hattermann, Tore; Smedsrud, Lars Henrik; Nøst, Ole Anders; Lilly, Jonathan M.; Galton-Fenzi, Ben K. (Elsevier, 2014-10)
      Melting at the base of floating ice shelves is a dominant term in the overall Antarctic mass budget. This study applies a high-resolution regional ice shelf/ocean model, constrained by observations, to (i) quantify present ...
      Journal article
    • Effect of critical latitude and seasonal stratification on tidal current profiles along Ronne Ice Front, Antarctica 

      Makinson, Keith; Schröder, Michael; Østerhus, Svein (American Geophysical Union, 2006-03-30)
      The ice front region of Ronne Ice Shelf lies near the critical latitude of the semidiurnal M2 tide, the principal tidal constituent in the southern Weddell Sea. Here the Coriolis frequency almost equals the M2 tidal ...
      Journal article
    • The effect of moisture transport variability on Ethiopian summer precipitation 

      Viste, Ellen Marie; Sorteberg, Asgeir (Royal Meteorological Society, 2013-12)
      The main rainy season in Ethiopia occurs during the northern hemisphere summer, when air masses carrying moisture from the Indian Ocean, the Gulf of Guinea, the African continent, the Red Sea, and the Mediterranean Sea, ...
      Journal article
    • The effect of wind speed products and wind speed-gas exchange relationships on interannual variability of the air-sea CO2 gas transfer velocity 

      Olsen, Are; Wanninkhof, Rik; Triñanes, Joaquin; Johannessen, Truls (Blackwell, 2005)
      The lack of a firm relationship between wind speed (U10) and gas transfer velocity (k) is considered to be one of the factors that hinders accurate quantification of interannual variations of ocean–atmosphere CO2 fluxes. ...
      Journal article
    • Effects of altitude and aerosol on UV radiation 

      Pfeifer, M.; Koepke, P.; Reuder, Joachim (American Geophysical Union, 2006-01-10)
      Measurements of erythemally weighted UV radiation during about 600 days at different sites in Bolivia and Germany ranging from 550 to 5240 m above sea level have been used to derive the altitude effect AE under cloud-free ...
      Journal article
    • Effects of simulated natural variability on Arctic temperature 

      Sorteberg, Asgeir; Furevik, Tore; Drange, Helge; Kvamstø, Nils Gunnar (American Geophysical Union, 2005-09-23)
      A five-member ensemble with a coupled atmospheresea ice-ocean model is used to examine the effects of natural variability on climate projections for the Arctic. The individual ensemble members are initialized from a 300 ...
      Journal article