Browsing Geophysical Institute by Title

Now showing items 118-137 of 1292

    • Bidirectional DC-DC Converter For Charging Batteries of Electric Vehicles 

      Storebø, Fredrik (Master thesis, 2021-06-01)
      The popularity of electric vehicles has seen significant growth in the latest years. More electric vehicles are connected to the grid, and the load is increased consequently. The electric vehicle battery can be employed ...

    • Bidirectional DC-DC Converter for Supercapacitor as DC-bus Stabilization Element 

      Reigstad, Marius (Master thesis, 2021-06-01)
      The demand for renewable energy from wind and solar is increasing. These energy sources are intermittent and unpredictable to a degree and require a stable but fast responding DCgrid. This is achieved by extending the ...

    • Bidirectional Dual Active Bridge Converter for Energy Storage Applications 

      Ramsdal, Martin Thormodsæter (Master thesis, 2022-08-08)
      Etterspørselen av energi gjennom vindturbiner og solcelleanlegg har økt i de siste tiårene. En stor ulempe ved disse fornybare energiressursene er deres fluktuerende natur, siden de ikke kan produsere kraft på forespørsel. ...

    • Biogeochemical Investigations on the Atlantic Meridional Transect of R/V Kronprins Haakon, 2018 

      Apelthun, Lise Bagne (Master thesis, 2019-12-11)

    • The BLLAST field experiment: Boundary-Layer late afternoon and sunset turbulence 

      Lothon, Marie; Louhou, Fabienne; Pino, David; Couvreux, Fleur; Pardyjak, Erik; Reuder, Joachim; Vilà-Guerau De Arellano, Jordi; Durand, Pierre; Hartogensis, Oscar K.; Legain, Dominique; Augustin, Patrick V.; Gioli, Beniamino; Lenschow, Donald H.; Faloona, Ian C.; Yagüe, Carlos; Alexander, Daniel C.; Angevine, Wayne M.; Bargain, Erwan; Barrié, Joël; Bazile, Eric; Bezombes, Yannick; Blay-Carreras, Estel; Van De Boer, Anneke; Boichard, Jean Luc; Bourdon, Anne; Butet, Alain; Campistron, Bernard A.; De Coster, Olivier; Cuxart, Joan; Dabas, Alain M.; Darbieu, Clara; Deboudt, Karine; Delbarre, Hervé; Derrien, Solène; Flament, Pascal; Fourmentin, Marc; Garai, Anirban; Gibert, Fabien; Graf, Alexander T.; Gröbner, Julian; Guichard, Françoise; Jiménez, Mantonia Antonia; Jonassen, Marius Opsanger; Van Den Kroonenberg, Aline C.; Magliulo, Vincenzo; Martin, Sabrina; Martinez, Daniel; Mastrorillo, Laurence; Moene, Arnold F.; Molinos, Francisco Lendinez; Moulin, Emilie; Pietersen, Henk P.; Piguet, Bruno; Pique, Eric; Román-Cascón, Carlos; Rufin-Soler, Caroline; Saïd, Frédérique; Sastre-Marugán, Mariano; Seity, Yann; Steeneveld, Gert Jan; Toscano, Piero; Traullé, Olivier; Tzanos, Diane; Wacker, Stefan; Wildmann, Norman; Zaldei, Alessandro (Peer reviewed; Journal article, 2014-10-16)
      Due to the major role of the sun in heating the earth's surface, the atmospheric planetary boundary layer over land is inherently marked by a diurnal cycle. The afternoon transition, the period of the day that connects the ...

    • Bottom melting of Arctic Sea Ice in the Nansen Basin due to Atlantic Water influence 

      Muilwijk, Morven Korneel (Master thesis, 2016-05-24)
      The hydrographic situation for a region north of Svalbard is investigated using observations from the Norwegian Young Sea Ice Cruise (N-ICE2015). Observations from January to June 2015 are compared to historical observations ...

    • A brief history of climate – the northern seas from the Last Glacial Maximum to global warming 

      Eldevik, Tor; Risebrobakken, Bjørg; Bjune, Anne Elisabeth; Andersson, Carin; Birks, Harry John Betteley; Dokken, Trond Martin; Drange, Helge; Glessmer, Mirjam Sophia; Li, Camille; Nilsen, Jan Even Øie; Otterå, Odd Helge; Richter, Kristin; Skagseth, Øystein (Peer reviewed; Journal article, 2014-12)
      The understanding of climate and climate change is fundamentally concerned with two things: a well-defined and sufficiently complete climate record to be explained, for example of observed temperature, and a relevant ...

    • Bruk og misbruk av klimaframskrivninger 

      Sorteberg, Asgeir (Journal article, 2009)
      Forskere er avhengig av pålitelige klimaframskrivninger for å kunne si hvilke konsekvenser klimaforandringer får for mennesker og samfunn i framtiden. Men hva kan klimaframskrivninger brukes til og hvordan bør de brukes?

    • Calibration and assessment of electrochemical low-cost sensors in remote alpine harsh environments 

      Dallo, Frederico; Zannoni, Daniele; Gabrieli, Jacopo; Cristofanelli, Paolo; Calzolari, Francescopiero; de Blasi, Fabrizio; Spolaor, Andrea; Battistel, Dario; Lodi, Rachele; Cairns, Warren R. L.; Fjæraa, Ann Mari; Bonasoni, Paolo; Barbante, Carlo (Journal article; Peer reviewed, 2021)
      This work presents results from an original open-source low-cost sensor (LCS) system developed to measure tropospheric O3 in a remote high altitude alpine site. Our study was conducted at the Col Margherita Observatory ...

    • Calving rates at tidewater glaciers vary strongly with ocean temperature 

      Luckman, Adrian; Benn, Doug; Cottier, Finlo; Bevan, Suzanne; Nilsen, Frank; Inall, Mark (Peer reviewed; Journal article, 2015-10-09)
      Rates of ice mass loss at the calving margins of tidewater glaciers (frontal ablation rates) are a key uncertainty in sea level rise projections. Measurements are difficult because mass lost is replaced by ice flow at ...

    • Can a dual pulsed lidar system measure the lateral coherence of turbulence? 

      Kavaliauskas, Paulius (Master thesis, 2023-08-10)
      Characterizing the coherence of turbulence in the marine boundary layer faces a significant challenge due to the limited availability of offshore measurements within the relevant altitude ranges, particularly up to 250 m. ...

    • Can Areawide Building Retrofitting Affect the Urban Microclimate? An LES Study for Berlin, Germany 

      Maronga, Bjørn; Winkler, Matthias; Li, Dan (Journal article; Peer reviewed, 2022)
      In this work, we investigate the effect of areawide building retrofitting on summertime, street-level outdoor temperatures in an urban district in Berlin, Germany. We perform two building-resolving, weeklong large-eddy ...

    • Cancellation of the precessional cycle in δ18O records during the Early Pleistocene 

      Morée, Anne; Sun, Tianyi; Bretones, Anaïs; Straume, Eivind Olavson; Nisancioglu, Kerim Hestnes; Gebbie, Geoffrey (Journal article; Peer reviewed, 2021)
      The dominant pacing of glacial‐interglacial cycles in deep‐ocean δ18O records changed substantially during the Mid‐Pleistocene Transition. The precessional cycle (∼23 ky) is absent during the Early Pleistocene, which we ...

    • Carbon and oxygen fluxes in the Barents and Norwegian Seas : production, air-sea exchange and budget calculations 

      Kivimäe, Caroline (Doctoral thesis, 2007-08-17)
      This thesis focus on the carbon and oxygen fluxes in the Barents and Norwegian Seas and presents four studies where the main topics are variability of biological production, air-sea exchange and budget calculations. The ...

    • Carbon to nutrient ratios in marine systems: understanding natural variability Studies of seasonal, inter-annual and regional variability 

      Frigstad, Helene (Doctoral thesis, 2012-06-29)
      Ecological stoichiometry deals with the coupling of the carbon (C), nitrogen (N) and phosphorus (P) cycles at the base of the aquatic food webs. Variation in C:N:P stoichiometry is driven by a multitude of factors, and the ...

    • Causes of the large warm bias in the Angola–Benguela Frontal Zone in the Norwegian Earth System Model 

      Koseki, Shunya; Keenlyside, Noel; Demissie, Teferi Dejene; Toniazzo, Thomas; Counillon, Francois; Bethke, Ingo; Ilicak, Mehmet; Shen, Mao-Lin (Journal article; Peer reviewed, 2018)
      We have investigated the causes of the sea surface temperature (SST) bias in the Angola–Benguela Frontal Zone (ABFZ) of the southeastern Atlantic Ocean simulated by the Norwegian Earth System Model (NorESM). Similar to ...

    • Certain aspects of high latitude climate variability 

      Sorokina, Svetlana (Doctoral thesis, 2014-06-13)

    • CFD Analysis of a Microturbine Combustor using an LES Turbulence Model 

      Kvale, Mikhael (Master thesis, 2020-07-04)

    • Challenges in seismic hazard assessment: Analyses of ground motion modelling and seismotectonic sources 

      Sørensen, Mathilde Bøttger (Doctoral thesis, 2006-06-21)
      Seismic hazard assessment has an important societal impact in describing levels of ground motions to be expected in a given region in the future. Challenges in seismic hazard assessment are closely associated with the fact ...

    • Changes in atmospheric variability in a glacial climate and the impacts on proxy data: a model intercomparison 

      Pausata, Francesco S. R.; Li, Camille; Wettstein, Justin; Nisancioglu, Kerim Hestnes; Battisti, David Stephen (Peer reviewed; Journal article, 2009-09-11)
      Using four different climate models, we investigate sea level pressure variability in the extratropical North Atlantic in the preindustrial climate (1750 AD) and at the Last Glacial Maximum (LGM, 21 kyrs before present) ...