Now showing items 645-664 of 913

    • Productivity in the Barents Sea - Response to recent climate variability 

      Dalpadado, Padmini; Arrigo, Kevin R.; Hjøllo, Solfrid Sætre; Rey, Francisco; Ingvaldsen, Randi; Sperfeld, Erik; van Dijken, Gert L.; Stige, Leif Christian; Olsen, Are; Ottersen, Geir (Peer reviewed; Journal article, 2014-05-01)
      The temporal and spatial dynamics of primary and secondary biomass/production in the Barents Sea since the late 1990s are examined using remote sensing data, observations and a coupled physical-biological model. Field ...
    • Projected changes in significant wave height toward the end of the 21st century: Northeast Atlantic 

      Aarnes, Ole Johan; Reistad, Magnar; Breivik, Øyvind; Bitner-Gregersen, Elzbieta M.; Eide, Lars Ingolf; Gramstad, Odin; Magnusson, Anne Karin; Natvig, Bent; Vanem, Erik (Peer reviewed; Journal article, 2017-04)
      Wind field ensembles from six CMIP5 models force wave model time slices of the northeast Atlantic over the last three decades of the 20th and the 21st centuries. The future wave climate is investigated by considering the ...
    • Projected pH reductions by 2100 might put deep North Atlantic biodiversity at risk 

      Gehlen, Marion; Séférian, Roland; Jones, Daniel O.B.; Roy, Tilla; Roth, Raphael; Barry, James P.; Bopp, Laurent; Doney, Scott C.; Dunne, John P.; Heinze, Christoph; Joos, Fortunat; Orr, James C.; Resplandy, Laure; Segschneider, Joachim; Tjiputra, Jerry (Peer reviewed; Journal article, 2014-12-11)
      This study aims to evaluate the potential for impacts of ocean acidification on North Atlantic deep-sea ecosystems in response to IPCC AR5 Representative Concentration Pathways (RCPs). Deep-sea biota is likely highly ...
    • Proof of concept for turbulence measurements with the RPAS SUMO during the BLLAST campaign 

      Båserud, Line; Reuder, Joachim; Jonassen, Marius Opsanger; Kral, Stephan; Bakhoday Paskyabi, Mostafa; Lothon, Marie (Peer reviewed; Journal article, 2016-10-06)
      The micro-RPAS (remotely piloted aircraft system) SUMO (Small Unmanned Meteorological Observer) equipped with a five-hole-probe (5HP) system for turbulent flow measurements was operated in 49 flight missions during the ...
    • Proof of concept for wind turbine wake investigations with the RPAS SUMO 

      Reuder, Joachim; Båserud, Line; Kral, Stephan; Kumer, Valerie-Marie; Wagenaar, Jan Willem; Knauer, Andreas (Peer reviewed; Journal article, 2016-09)
      The Small Unmanned Meteorological Observer (SUMO) has been operated in the vicinity of five research turbines of the Energy Research Centre of the Netherlands (ECN) at the test site Wieringermeer. The intention of the ...
    • Properties of the Yellow Sea Meteotsunamis in Spring 

      Kang, Yong-Seong (Master thesis, 2015-06-01)
      This paper documents the properties of the Yellow Sea meteotsunamis in spring based on a total num- ber of 49 meteotsunami events in spring (Mar-May) between 2002 and 2013 documented by the Korea Meteorological Administration ...
    • PVTx Properties of a Two-phase CO2 Jet from Ruptured Pipeline 

      Botnen, Helle Augdal; Omar, Abdirahman; Aavatsmark, Ivar; Alendal, Guttorm; Johannessen, Truls (Peer reviewed; Journal article, 2013)
      Span and Wagner equation of state (SW EOS) have been used to investigate changes in the thermodynamic properties of CO2 during a depressurization process from a pipeline into marine environment. The process is assumed to ...
    • Quantification of iron-rich volcanogenic dust emissions and deposition over the ocean from Icelandic dust sources 

      Arnalds, Olafur; Ólafsson, Haraldur; Dagsson-Waldhauserova, Pavla (Peer reviewed; Journal article, 2014-12-02)
      Iceland has extremely active dust sources that result in large-scale emissions and deposition on land and at sea. The dust has a volcanogenic origin of basaltic composition with about 10% Fe content. We used two independent ...
    • Quantifying Errors in Observationally Based Estimates of Ocean Carbon Sink Variability 

      Gloege, Lucas; McKinley, Galen A.; Landschützer, Peter; Fay, Amanda R.; Frölicher, Thomas L.; Fyfe, John; Ilyana, Tatiana; Jones, Stephen Daniel; Lovenduski, Nicole; Rodgers, Keith B.; Schlunegger, Sarah; Takano, Yohei (Journal article; Peer reviewed, 2021)
      Reducing uncertainty in the global carbon budget requires better quantification of ocean CO2 uptake and its temporal variability. Several methodologies for reconstructing air-sea CO2 exchange from pCO2 observations indicate ...
    • Quantifying the contribution of anthropogenic influence to the East Asian winter monsoon in 1960-2012 

      Hao, Xin; He, Shengping; Wang, Huijun; Han, Tingting (Peer reviewed; Journal article, 2019-08-07)
      The East Asian winter monsoon (EAWM) is greatly influenced by many factors that can be classified as anthropogenic forcing and natural forcing. Here we explore the contribution of anthropogenic influence to the change in ...
    • A quantitative description of the West Spitsbergen Current by combining hydrography, altimetry and in-situ current meters 

      Muus Falck, Håvard (Master thesis, 2014-06-02)
      In a warming Arctic Ocean (AO) it is important to study its main source of oceanic heat and salt. Here, seasonal climatological sections of the West Spitsbergen Current (WSC) across 78.83°N have been constructed using ...
    • The quiet crossing of ocean tipping points 

      Heinze, Christoph; Blenckner, Thorsten; Martins, Helena; Rusiecka, Dagmara; Döscher, Ralf; Gehlen, Marion; Gruber, Nicolas; Holland, Elisabeth; Hov, Øystein; Joos, Fortunat; Matthews, John Brian Robin; Rødven, Rolf; Wilson, Simon (Journal article; Peer reviewed, 2021)
      Anthropogenic climate change profoundly alters the ocean’s environmental conditions, which, in turn, impact marine ecosystems. Some of these changes are happening fast and may be difficult to reverse. The identification ...
    • Rapid changes in the Subpolar Gyre based on an Ocean General Circulation Model 

      Blesvik, Torgeir Hauge (Master thesis, 2013-06-03)
      Data from the ocean component of the Norwegian Earth System Model has been analyzed for the period 1960-2008. Most attention is given to the Subpolar Gyre, which strength and spatial extensiveness is understood to have ...
    • Rapid water temperature variations at the northern shelf of the Yellow Sea 

      Asplin, Lars; Lin, Fan; Budgell, Paul; Strand, Øivind (Journal article; Peer reviewed, 2021-05-06)
      During summer, there is great spatial variability in bottom water temperature on the northern shelf of the Yellow Sea. This variability is associated with a thermal front along the shelf. Oscillatory currents from semidiurnal ...
    • Recent and future changes of the Arctic sea-ice cover 

      Smedsrud, Lars Henrik; Sorteberg, Asgeir; Kloster, Kjell (Peer reviewed; Journal article, 2008)
      The present and future state of the Arctic sea ice cover is explored using new observations and a coupled one dimensional air–sea–ice model. Updated satellite observations of Fram Strait ice-area export show an increase ...
    • Recent drought and precipitation tendencies in Ethiopia 

      Viste, Ellen Marie; Korecha, Diriba; Sorteberg, Asgeir (Peer reviewed; Journal article, 2013-05)
      In 2011, drought in the Horn of Africa again made news headlines. This study aims to quantify the meteorological component of this and other drought episodes in Ethiopia since 1971. A monthly precipitation data set for 14 ...
    • Recent wind driven high sea ice area export in the Fram Strait contributes to Arctic sea ice decline 

      Smedsrud, Lars Henrik; Sirevaag, Anders; Kloster, Kjell; Sorteberg, Asgeir; Sandven, Stein (Peer reviewed; Journal article, 2011-10-14)
      Arctic sea ice area has been decreasing for the past two decades. Apart from melting, the southward drift through Fram Strait is the main ice loss mechanism. We present high resolution sea ice drift data across 79° N from ...
    • Recommendation on use of wind lidars 

      Reuder, Joachim; Cheynet, Etienne; Clifton, Andrew; van Dooren, Marijn Floris; Gottschall, Julia; Jakobsen, Jasna Bogunovic; Mann, Jakob; Palma, Jose; Schlipf, David; Sjøholm, Mikael; Trujillo, Juan-Jose; Thobois, Ludovic; Würth, Ines; Zasso, Alberto (Research report, 2021)
    • Reconciling Observation and Model Trends in North Atlantic Surface CO2 

      Lebehot, Alice; Halloran, Paul R.; Watson, Andrew J.; McNeall, Doug; Ford, David A; Landschützer, Peter; Lauvset, Siv Kari; Schuster, Ute (Peer reviewed; Journal article, 2019)
      The North Atlantic Ocean is a region of intense uptake of atmospheric CO2. To assess how this CO2 sink has evolved over recent decades, various approaches have been used to estimate basin‐wide uptake from the irregularly ...
    • Reconstructing the time history of the air-sea CO2 disequilibrium and its rate of change in the eastern subpolar North Atlantic, 1972–1989 

      Omar, Abdirahman M.; Olsen, Are (Peer reviewed; Journal article, 2006-02-18)
      This study determines the temporal changes of wintertime surface ocean partial pressure of CO2 (pCO2 SW) in the eastern subpolar North Atlantic (esNA) (50–64ºN; 32–10ºW) by using data of carbon-system parameters and ...