Now showing items 206-225 of 494

    • Korrigering av modellestimert nedbør ved hjelp av historisk data. 

      Aabrekk, Mariann (The University of Bergen, 2010-06-01)
      I denne oppgåva er det sett på moglegheit for betring av modellestimert nedbør ved å korrigere modellerte nedbørsestimat ved hjelp av fleire ulike korreksjonsfaktorar som tar omsyn til ulike vêrtypar og nedbørsintensiteten. ...
      Master thesis
    • Laboratory study of frazil ice accumulation under wave conditions 

      De La Rosa, Sara; Maus, Sønke (Copernicus Publications, 2012-02-09)
      Ice growth in turbulent seawater is often accompanied by the accumulation of frazil ice crystals at its surface, forming a grease ice layer. The thickness and volume fraction of this ice layer play an important role in ...
      Journal article
    • Laboratory study of initial sea-ice growth: properties of grease ice and nilas 

      Naumann, Ann-Kristin; Notz, Dirk; Håvik, Lisbeth; Sirevaag, Anders (Copernicus Publications, 2012-07-10)
      We investigate initial sea-ice growth in an ice-tank study by freezing an NaCl solution of about 29 g kg−1 in three different setups: grease ice grew in experiments with waves and in experiments with a current and wind, ...
      Journal article
    • Langmuir Turbulence in the HYCOM Ocean Model 

      Malila, Mika Petteri (The University of Bergen, 2017)
      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
    • Late winter response to atmospheric and tidal forcing in the Førdefjord, inferred from mooring observations 

      Hiorth, Katrine (The University of Bergen, 2018-06-20)
      The Førdefjord is a narrow fjord on the western coast of Norway. A shallow sill is situated at the Ålasund, in the centre part of the fjord. A deep basin, 3 km north of the sill, has been approved as a deposit site for ...
      Master thesis
    • 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
    • A Linear Model for Orographic Precipitation in meteorological and climatological downscaling 

      Caroletti, Giulio Nils (The University of Bergen, 2015-06-24)
      Orographic precipitation has always been a major field of study in atmospheric sciences, because of its major role in the water budget and its influence on environmental hazards like floods and droughts - and thus on human ...
      Doctoral thesis
    • The linear stationary wave response to Arctic amplification related heating 

      Sellevold, Raymond (The University of Bergen, 2015-06-01)
      There has been a raft of manuscripts which claim to show that Arctic amplification (AA) is responsible for changes in the large-scale wintertime midlatitude atmospheric circulation. Responses to these studies have shown ...
      Master thesis
    • The link between eddy-driven jet variability and weather regimes in the North Atlantic-European sector 

      Madonna, Erica; Li, Camille; Grams, Christian M; Woollings, Tim (Wiley, 2017-10)
      This study reconciles two perspectives on wintertime atmospheric variability in the North Atlantic–European sector: the zonal‐mean framework comprising three preferred locations of the eddy‐driven jet (southern, central, ...
      Journal article
    • Linking Northern High-Latitude Cryospheric Changes to Large-Scale Atmospheric Circulation 

      Knudsen, Erlend Moster (The University of Bergen, 2015-03-20)
      Warming twice as fast as the rest of the globe, the northern high-latitudes arguably show the clearest evidences of observed and projected climate changes. Two of these are the rapid loss of Arctic sea ice and the shrinking ...
      Doctoral thesis
    • Local flow conditions in the Bergen valley based on observations and numerical simulations 

      Valved, Aslaug Skålevik (The University of Bergen, 2012-10-16)
      The complex topography and variability in surface roughness in the Bergen valley aff-ects the flow conditions in a multitude of ways. The steep mountains give shelter during strong synoptic flow, but the orography of Bergen ...
      Master thesis
    • The Lofoten Basin Eddy: three years of evolution as observed by Seagliders 

      Yu, Lusha; Bosse, Anthony; Fer, Ilker; Orvik, Kjell Arild; Bruvik, Erik Magnus; Hessevik, Idar; Kvalsund, Karsten (American Geophysical Union, 2017-08)
      The Lofoten Basin in the Norwegian Sea is an area where the warm Atlantic Water is subject to the greatest heat losses anywhere in the Nordic Seas. A long-lived, deep, anticyclonic eddy is located in the central part of ...
      Journal article
    • Long-Term Retrospective Analysis of Mackerel Spawning in the North Sea: A New Time Series and Modeling Approach to CPR Data 

      Jansen, Teunis; Kristensen, Kasper; Payne, Mark; Edwards, Martin; Schrum, Corinna; Pitois, Sophie (Public Library of Science, 2012-06-21)
      We present a unique view of mackerel (Scomber scombrus) in the North Sea based on a new time series of larvae caught by the Continuous Plankton Recorder (CPR) survey from 1948-2005, covering the period both before and after ...
      Peer reviewedJournal article
    • Long-term surface pCO2 trends from observations and models 

      Tjiputra, Jerry; Olsen, Are; Bopp, Laurent; Lenton, Andrew; Pfeil, Benjamin; Roy, Tilla; Segschneider, Joachim; Totterdell, Ian; Heinze, Christoph (Co-Action PublishingThe International Meteorological Institute in Stockholm, 2014-05-19)
      We estimate regional long-term surface ocean pCO2 growth rates using all available underway and bottled biogeochemistry data collected over the past four decades. These observed regional trends are compared with those ...
      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
    • Long-term variability of dust events in Iceland (1949-2011) 

      Dagsson-Waldhauserova, Pavla; Arnalds, Olafur; Ólafsson, Haraldur (Copernicus PublicationsEuropean Geosciences Union, 2014-12-16)
      The long-term frequency of atmospheric dust observations was investigated for the southern part of Iceland and interpreted together with earlier results obtained from northeastern (NE) Iceland (Dagsson-Waldhauserova et ...
      Journal article
    • Loss of sea ice during winter north of Svalbard 

      Onarheim, Ingrid Husøy; Smedsrud, Lars Henrik; Ingvaldsen, Randi; Nilsen, Frank (International Meteorological Institute, Stockholm University, 2014-06-05)
      Sea ice loss in the Arctic Ocean has up to now been strongest during summer. In contrast, the sea ice concentration north of Svalbard has experienced a larger decline during winter since 1979. The trend in winter ice area ...
      Journal article
    • Low Level Jet Streams at the Sea Ice Edge - Numerical Simulations using WRF 

      Keiderling, Stefan (The University of Bergen, 2013-06-03)
      The goal of the presented thesis is to investigate the formation of low level jets at the sea ice edge. Differential heating creates very sharp fronts at the ice edge. A transversal circulation, initiated by altered pressure ...
      Master thesis
    • The Madden-Julian Oscillation in a warmer world 

      Chang, Chiung-Wen June; Tseng, Wan-Ling; Huang-Hsiung, Hsu; Keenlyside, Noel; Tsuang, Ben-Jei (Wiley, 2015-07)
      Global warming's impact on the Madden-Julian Oscillation (MJO) is assessed using one of the few models capable in reproducing its key features. In a warmer climate predicted for the end of the century, the MJO increases ...
      Journal article
    • Mapping the fugacity of CO2 in the Nordic Seas and the northern North Atlantic Ocean 

      Kvæstad, Elise (The University of Bergen, 2013-12-20)
      Self organizing maps (SOMs) have been used to estimate seawater fugacity of CO2 (fCO2) distribution in the Nordic Seas and the northern North Atlantic Ocean for 2005-2007. Four maps were produced for each region using ...
      Master thesis