Now showing items 605-624 of 912

    • On the recent time history and forcing of the inflow of Atlantic Water to the Arctic Mediterranean 

      Nilsen, Jan Even Øie; Hátún, Hjalmar; Sandø, Anne Britt; Bethke, Ingo; Laurantin, Olivier; Gao, Yongqi; Drange, Helge; Furevik, Tore (Extended Abstract for The ACIA International Scientific Symposium on Climate Change in the Arctic;, Conference object, 2004)
    • On the seasonal signal of the Filchner overflow, Weddell Sea, Antarctica 

      Darelius, Elin Maria K.; Strand, Kjersti Opstad; Østerhus, Svein; Gammelsrød, Tor; Årthun, Marius; Fer, Ilker (Peer reviewed; Journal article, 2014)
      The cold ice shelf water (ISW) that formed below the Filchner–Ronne Ice Shelf in the southwestern Weddell Sea, Antarctica, escapes the ice shelf cavity through the Filchner Depression and spills over its sill at a rate of ...
    • One more step toward a warmer Arctic 

      Polyakov, Igor V.; Beszczynska-Möller, Agnieszka; Carmack, Eddy C.; Dmitreko, Igor A.; Fahrbach, E.; Frolov, Ivan E.; Gerdes, Rüdiger; Hansen, Edmond; Holfort, Jürgen; Ivanov, Vladimir V.; Johnson, Mark A.; Karcher, Michael; Kauker, Frank; Morison, James; Orvik, Kjell Arild; Schauer, Ursula; Simmons, Harper L.; Skagseth, Øystein; Sokolov, Vladimir T.; Steele, Michael; Timokhov, Leonid A.; Walsh, David; Walsh, John E. (Peer reviewed; Journal article, 2005-09-09)
      This study was motivated by a strong warming signal seen in mooring-based and oceanographic survey data collected in 2004 in the Eurasian Basin of the Arctic Ocean. The source of this and earlier Arctic Ocean changes lies ...
    • One-dimensional evolution of the upper water column in the Atlantic sector of the Arctic Ocean in winter 

      Fer, Ilker; Peterson, Algot Kristoffer; Randelhoff, Achim; Meyer, Amelie (Peer reviewed; Journal article, 2017-03)
      A one-dimensional model is employed to reproduce the observed time evolution of hydrographic properties in the upper water column during winter, between 26 January and 11 March 2015, in a region north of Svalbard in the ...
    • Open-source feature-tracking algorithm for sea ice drift retrieval from Sentinel-1 SAR imagery 

      Muckenhuber, Stefan; Korosov, Anton Andreevich; Sandven, Stein (Peer reviewed; Journal article, 2016-04-26)
      A computationally efficient, open-source feature-tracking algorithm, called ORB, is adopted and tuned for sea ice drift retrieval from Sentinel-1 SAR (Synthetic Aperture Radar) images. The most suitable setting and parameter ...
    • Open-source sea ice drift algorithm for Sentinel-1 SAR imagery using a combination of feature tracking and pattern matching 

      Muckenhuber, Stefan; Sandven, Stein (Peer reviewed; Journal article, 2017-08-07)
      An open-source sea ice drift algorithm for Sentinel-1 SAR imagery is introduced based on the combination of feature tracking and pattern matching. Feature tracking produces an initial drift estimate and limits the search ...
    • OpenDrift v1.0: A generic framework for trajectory modelling 

      Dagestad, Knut-Frode; Röhrs, Johannes; Breivik, Øyvind; Ådlandsvik, Bjørn (Peer reviewed; Journal article, 2018-04-13)
      OpenDrift is an open-source Python-based framework for Lagrangian particle modelling under development at the Norwegian Meteorological Institute with contributions from the wider scientific community. The framework is ...
    • Operational algorithm for ice–water classification on dual-polarized RADARSAT-2 images 

      Zakhvatkina, Natalia; Korosov, Anton; Muckenhuber, Stefan; Sandven, Stein; Babiker, Mohamed (Peer reviewed; Journal article, 2017-01-11)
      Synthetic Aperture Radar (SAR) data from RADARSAT-2 (RS2) in dual-polarization mode provide additional information for discriminating sea ice and open water compared to single-polarization data. We have developed an automatic ...
    • Optimization of the Offshore Wind Inter-Array Cable Layout problem using heuristic based algorithms 

      Fotedar, Sunney (Master thesis, 2018-06-13)
      The current work presents an in-exact solution method used to identify feasible, and less costly inter-array cable layout for offshore wind farms. The solution method developed has been built considering the interests of ...
    • Origin of moisture at Arctic sites 

      Jonassen, Trine (Master thesis, 2016-06-01)
      The hydrological cycle is an important component in the understanding of the climate system, and a good understanding of the moisture transport in the atmosphere is important in a changing climate. The climate change may ...
    • Overview of the Norwegian Earth System Model (NorESM2) and key climate response of CMIP6 DECK, historical, and scenario simulations 

      Seland, Øyvind; Bentsen, Mats; Oliviè, Dirk Jan Leo; Toniazzo, Thomas; Gjermundsen, Ada; Graff, Lise Seland; Debernard, Jens Boldingh; Gupta, Alok Kumar; He, Yan-Chun; Kirkevåg, Alf; Schwinger, Jörg; Tjiputra, Jerry; Aas, Kjetil Schanke; Bethke, Ingo; Fan, Yuanchao; Griesfeller, Jan; Grini, Alf; Guo, Chuncheng; Ilicak, Mehmet; Karset, Inger Helene H.; Landgren, Oskar Andreas; Liakka, Johan; Moseid, Kine Onsum; Nummelin, Aleksi; Spensberger, Clemens; Tang, Hui; Zhang, Zhongshi; Heinze, Christoph; Iversen, Trond; Schulz, Michael (Journal article; Peer reviewed, 2020-12)
      The second version of the coupled Norwegian Earth System Model (NorESM2) is presented and evaluated. NorESM2 is based on the second version of the Community Earth System Model (CESM2) and shares with CESM2 the computer ...
    • Overview of the PALM model system 6.0 

      Maronga, Bjørn; Banzhaf, Sabine; Burmeister, Cornelia; Esch, Thomas; Forkel, Renate; Fröhlich, Dominik; Fuka, Vladimir; Gehrke, Katrin Frieda; Geletič, Jan; Giersch, Sebastian; Gronemeier, Tobias; Groß, Günter; Heldens, Wieke; Hellsten, Antti; Hoffmann, Fabian; Inagaki, Atsushi; Kadasch, Eckhard; Kanani-Sühring, Farah; Ketelsen, Klaus; Ali Khan, Basit; Knigge, Christoph; Knoop, Helge; Krč, Pavel; Kurppa, Mona; Maamari, Halim; Matzarakis, Andreas; Mauder, Matthias; Pallasch, Matthias; Pavlik, Dirk; Pfafferott, Jens; Resler, Jaroslav; Rissmann, Sascha; Russo, Emmanuele; Salim, Mohamed; Schrempf, Michael; Schwenkel, Johannes; Seckmeyer, Gunther; Schubert, Sebastian; Sühring, Matthias; von Tils, Robert; Vollmer, Lukas; Ward, Simon; Witha, Björn; Wurps, Hauke; Zeidler, Julian; Raasch, Siegfried (Journal article; Peer reviewed, 2020)
      In this paper, we describe the PALM model system 6.0. PALM (formerly an abbreviation for Parallelized Large-eddy Simulation Model and now an independent name) is a Fortran-based code and has been applied for studying a ...
    • Ozone-induced climate change propped up by the Southern Hemisphere oceanic front 

      Ogawa, Fumiaki; Omrani, Nour-Eddine; Nishii, Kazuaki; Nakamura, Hisashi; Keenlyside, Noel (Peer reviewed; Journal article, 2015-11-23)
      The late twentieth century was marked by a significant summertime trend in the Southern Annular Mode (SAM), the dominant mode of tropospheric variability in the extratropical Southern Hemisphere (SH). This trend with ...
    • Parameterization of drag and dissolution of rising CO2 drops in seawater 

      Gangstø, Reidun; Haugan, Peter Mosby; Alendal, Guttorm (Journal article, 2005-05-24)
      In this work the dynamics and dissolution of a hydratecovered CO2 drop were studied, using a numeric model and data from one of very few CO2 experiments performed in the real ocean. A theory including the standard drag ...
    • Particle aggregation at the edges of anticyclonic eddies and implications for distribution of biomass 

      Samuelsen, Annette; Hjøllo, Solfrid Sætre; Johannessen, Johnny Andre; Patel, Ruben (Peer reviewed; Journal article, 2012-06-14)
      Acoustic measurements show that the biomass of zooplankton and mesopelagic fish is redistributed by mesoscale variability and that the signal extends over several hundred meters depth. The mechanisms governing this ...
    • Past climate variability: model analysis and proxy intercomparison 

      Pausata, Francesco S. R. (Doctoral thesis, 2010-10-22)
      This thesis investigates the climate variability of the late Quaternary (21 000 yrs BP to present day) using model simulations and proxy data. The thesis consists of four manuscripts and one appendix. In the first two ...
    • Pathways and export of Greenland Sea Water. In: The Nordic Seas: an integrated perspective 

      Eldevik, Tor; Straneo, Fiammetta; Sandø, Anne Britt; Furevik, Tore (Geophysical Monograph Series;158, Chapter, 2005)
    • Pathways and Water Mass Transformation Along and Across the Mohn‐Knipovich Ridge in the Nordic Seas 

      Ypma, Stefanie; Georgiou, S.; Dugstad, Johannes Sandanger; Pietrzak, J.D.; Katsman, C.A. (Journal article; Peer reviewed, 2020)
      Atlantic Water takes various pathways through the Nordic Seas, and its transformation to denser waters forms a crucial connection to the lower limb of the Atlantic Meridional Overturning Circulation. Circulation maps often ...
    • Peak-summer energy and carbon fluxes on a thawing permafrost site 

      Slettebø, Isak Haldorsson (Master thesis, 2018-12-13)
      We present measurements of surface fluxes taken between 7 July and 6 August 2017, on a palsa mire near the Iškoras mountain in Finnmark, northern Norway. Palsa mires are a particular landform found at the edge of the ...
    • Permeability of young sea ice from microtomographic images 

      Büttner, Juliane (Master thesis, 2011-02)
      The permeability of sea ice controls the transport of substances through the ice and thereby its surface properties as well as the exchange of heat, salt and gas between ice, ocean and atmosphere. More observations and ...