Now showing items 21-40 of 904

    • Analyses of the potential role of hydrogen for Norway in the transition to a zero-emission society 

      Solheimslid, Tore (Master thesis, 2017-06-23)
      The objective of this thesis is to analyze the potential role of hydrogen for Norway in the transition to a zero-emission society. The main sector of focus is the transport sector. Here, socioeconomic analyses are carried ...
    • Analysis of 3 years of precipitation measurements from the Micro Rain Radar located at the Geophysical Institute 

      Bergheim, Lillian (Master thesis, 2013-11-20)
      An analysis of three years of vertically pointing Micro Rain Radar (MRR) data from the measurement platform at the Geophysical Institute has been performed. The measurement period started at 13.04.2010 and ended at 12.04.2013. ...
    • Analysis of a low-level coastal jet off the western coast of Norway 

      Christakos, Konstantinos; Varlas, Georgios; Reuder, Joachim; Katsafados, Petros; Papadopoulos, Anastasios (Peer reviewed; Journal article, 2014)
      Offshore wind installations depend strongly on an improved knowledge of the atmospheric and ocean conditions affecting the marine atmospheric boundary layer (MABL). In particular the better understanding of atmospheric ...
    • Analysis of CryoSat’s radar altimeter waveforms over different Arctic sea ice regimes 

      Zygmuntowska, Marta; Khvorostovsky, Kirill (Journal article, 2014-06-11)
      Satellite altimetry has been used to derive information about sea ice thickness in the Arctic already for several decades. As part of the algorithms applied the shape of the radar signal is used to identify leads, the open ...
    • Analysis of the vertical temperature structure in the Bergen valley, Norway, and its connection to pollution episodes 

      Wolf, Tobias; Esau, Igor; Reuder, Joachim (Peer reviewed; Journal article, 2014-09)
      The vertical temperature profile in the lowest 1000m of the atmosphere determines a number of important physical processes and meteorological phenomena such as high concentrations of anthropogenic air pollutants in urban ...
    • Analysis of tidal currents in the North Sea from shipboard acoustic Doppler current profiler data 

      Vindenes, Håvard; Orvik, Kjell Arild; Søiland, Henrik; Wehde, Henning (Peer reviewed; Journal article, 2018-01-12)
      North Sea tidal currents are determined by applying harmonic analysis to ship-borne acoustic Doppler current profiler data recorded from 1999 to 2016, covering large areas of the northern North Sea. Direct current measurement ...
    • Annual and Seasonal Mean Net Evaporation Rates of the Red Sea Water during Jan 1958 - Dec 2007 

      Nassir, Sahbaldeen Abdulaziz (Master thesis, 2012-10-01)
      Data set including sea level, temperature, salinity, and current from Simple Ocean Data Assimilation (SODA) is used in this study to estimate the mean net annually and seasonally evaporation rates. Then wind data is used ...
    • Annual carbon fluxes in the upper Greenland Sea based on measurements and a box-model approach 

      Anderson, Leif G.; Drange, Helge; Chierici, M.; Fransson, A.; Johannessen, Truls; Skjelvan, Ingunn; Rey, Francisco (Peer reviewed; Journal article, 2000-07)
      Measurements of nitrate and the carbonate system parameters performed mainly from 1993 to 1997 have been used to estimate the evolution of the concentration fields over the year in the surface and underlying waters of the ...
    • Annual cycles of sea level and sea surface temperature in the western Mediterranean Sea 

      Bouzinac, Catherine; Font, Jordi; Johannessen, Johnny A. (Peer reviewed; Journal article, 2003-03-01)
      In the western Mediterranean Sea, sea level variations are the result of seasonal steric effect, atmospheric forcing and mesoscale circulation activity, particularly in the Alboran and Algerian basins, as well as water ...
    • Anthropogenic Carbon in the Nordic seas and Arctic Ocean, 1994 to 2007 

      Meisingset, Anne Kari Øhman (Master thesis, 2019-06-28)
      The increase of anthropogenic CO2 between 1994 and 2007 is quantified in the Nordic seas and Arctic Ocean with the extended multiple linear regression method (eMLR(C*)). To be able to map the increase in anthropogenic CO2 ...
    • Anthropogenic increase of oceanic pCO2 in the Barents Sea surface water 

      Omar, Abdirahman M.; Johannessen, Truls; Kaltin, Staffan; Olsen, Are (Peer reviewed; Journal article, 2003-12-26)
      We evaluate the change of surface water CO2 partial pressure ( pCO2 sw) in the Barents Sea (BS) between 1967 and 2000–2001. We use temperature (T) data collected during a survey in the BS in 1967 and a relationship between ...
    • Application of the unmanned Offshore Sensing SailBuoy for validation of ocean model simulations and remote sensing data in the North Atlantic 

      Borge, Ragnhild Stegali (Master thesis, 2015-12-01)
      The Offshore Sensing SailBuoy, is a remotely controlled, wind driven unmanned ocean vehicle. It sampled near surface properties during a mission in the North Atlantic in June - August 2014. Three parameters were recorded, ...
    • Aragonite saturation states and pH in western Norwegian fjords: Seasonal cycles and controlling factors, 2005-2009 

      Omar, Abdirahman; Skjelvan, Ingunn; Erga, Svein Rune; Olsen, Are (Peer reviewed; Journal article, 2016-07-26)
      The uptake of anthropogenic carbon dioxide (CO2) by the ocean leads to a process known as ocean acidification (OA), which lowers the aragonite saturation state (ΩAr) and pH, and this is poorly documented in coastal ...
    • Arctic amplification under global warming of 1.5 and 2 °C in NorESM1-Happi 

      Graff, Lise Seland; Iversen, Trond; Bethke, Ingo; Debernard, Jens Boldingh; Seland, Øyvind; Bentsen, Mats; Kirkevåg, Alf; Li, Camille; Oliviè, Dirk Jan Leo (Peer reviewed; Journal article, 2019)
      Differences between a 1.5 and 2.0 ∘C warmer climate than 1850 pre-industrial conditions are investigated using a suite of uncoupled (Atmospheric Model Intercomparison Project; AMIP), fully coupled, and slab-ocean experiments ...
    • Arctic climate change: observed and modelled temperature and sea-ice variability 

      Johannessen, Ola M.; Bengtsson, Lennart; Miles, Martin W.; Kuzmina, Svetlana I.; Semenov, Vladimir A.; Alekseev, Genrikh V.; Nagurnyi, Andrei P.; Zakharov, Victor F.; Bobylev, Leonid P.; Pettersson, Lasse H.; Hasselmann, Klaus; Cattle, Howard P. (Tellus A 56A(4), Peer reviewed; Journal article, 2004-07-09)
      Changes apparent in the arctic climate system in recent years require evaluation in a century-scale perspective in order to assess the Arctic's response to increasing anthropogenic greenhouse-gas forcing. Here, a new set ...
    • Arctic freshwater fluxes: sources, tracer budgets and inconsistencies 

      Forryan, Alexander; Bacon, Sheldon; Tsubouchi, Takamasa; Torres-Valdes, Sinhue; Garabato, Alberto C. Naveira (Peer reviewed; Journal article, 2019)
      The net rate of freshwater input to the Arctic Ocean has been calculated in the past by two methods: directly, as the sum of precipitation, evaporation and runoff, an approach hindered by sparsity of measurements, and by ...
    • Arctic Ocean carbon biogeochemistry under climate change and ocean acidification 

      Silyakova, Anna (Doctoral thesis; Peer reviewed, 2013-05-10)
      Human-induced CO2 emissions to the atmosphere cause climate change and ocean acidification. The strongest indicators of climate change and ocean acidification are expected to be found in the Arctic Ocean (AO). The AO area ...
    • Arctic Ocean CO2 uptake: An improved multiyear estimate of the air-sea CO2 flux incorporating chlorophyll a concentrations 

      Yasunaka, Sayaka; Siswanto, Eko; Olsen, Are; Hoppema, Mario; Watanabe, Eiji; Fransson, Agneta Ingrid; Chierici, Melissa; Murata, Akihiko; Lauvset, Siv Kari; Wanninkhof, Rik; Takahashi, Taro; Kosugi, Naohiro; Omar, Abdirahman; van Heuven, Steven; Mathis, Jeremy T. (Peer reviewed; Journal article, 2018-03-22)
      We estimated monthly air–sea CO2 fluxes in the Arctic Ocean and its adjacent seas north of 60∘ N from 1997 to 2014. This was done by mapping partial pressure of CO2 in the surface water (pCO2w) using a self-organizing map ...
    • The Arctic Ocean in a Fresh and Warm Future 

      Nummelin, Aleksi (Doctoral thesis, 2016-10-28)
      The Arctic Ocean remains one of the least known ocean regions due to its remote location, year-round sea ice cover, and harsh weather conditions. Today, knowledge of the Arctic atmosphere-sea ice-ocean system increases in ...
    • Arctic Ocean Response to Greenland Sea Wind Anomaliesin a Suite of Model Simulations 

      Muilwijk, Morven; Ilicak, Mehmet; Cornish, Sam B.; Danilov, Sergey; Gelderloos, Renske; Gerdes, Rüdiger; Haid, Verena; Haine, Thomas W.N.; Johnson, Helen L.; Kostov, Yavor; Kovács, Tamás; Lique, Camille; Marson, Juliana M.; Myers, Paul G.; Scott, Jeffery; Smedsrud, Lars H.; Talandier, Claude; Wang, Qiang (Peer reviewed; Journal article, 2019-08-04)
      Plain Language Summary: The North Atlantic Current is an extension of the Gulf Stream, which brings warm Atlantic Water northward as the current flows through the Nordic Seas. Eventually, it enters the cold deep Arctic ...