Now showing items 21-40 of 270

    • 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 (Copernicus Publications, 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 ...
      Journal article
    • 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 (Elsevier, 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 ...
      Journal article
    • Bruk og misbruk av klimaframskrivninger 

      Sorteberg, Asgeir (CICERO Senter for klimaforskning, 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 ...
      Journal article
    • Calving rates at tidewater glaciers vary strongly with ocean temperature 

      Luckman, Adrian; Benn, Doug; Cottier, Finlo; Bevan, Suzanne; Nilsen, Frank; Inall, Mark (Nature Publishing Group, 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 ...
      Journal article
    • 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 (Copernicus PublicationsEuropean Geosciences Union, 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) ...
      Journal article
    • Changes in the properties and distribution of the intermediate and deep waters in the Fram Strait 

      Langehaug, Helene Reinertsen; Falck, Eva (Elsevier, 2012-04)
      The Fram Strait is the only deep connection between the Arctic Ocean and the Nordic Seas (Greenland, Iceland, and Norwegian Seas), with a sill depth of approximately 2600 m. Consequently, observations from this area ...
      Journal article
    • Characterisation of Single Wind Turbine Wakes with Static and Scanning WINTWEX-W LiDAR Data 

      Kumer, Valerie-Marie; Reuder, Joachim; Svardal, Benny; Sætre, Camilla; Eecen, Peter (Elsevier, 2015)
      With further development of LiDAR technology wake measurements by use of LiDAR became of common interest in the wind energy community. To study new measurement strategies of scanning and nacelle LiDARs, in combination with ...
      Journal article
    • Characterization of the SUMO Turbulence Measurement System for Wind Turbine Wake Assessment 

      Båserud, Line; Flügge, Martin; Bhandari, Anak; Reuder, Joachim (Elsevier, 2014)
      The remotely piloted aircraft system (RPAS) SUMO (Small Unmanned Meteorological Observer) has been equipped with a miniaturized 5-hole probe sensor system for measurement of the 3-dimensional flow vector with a temporal ...
      Journal article
    • Characterization of turbulence in wind turbine wakes under different stability  conditions from static Doppler LiDAR measurements 

      Kumer, Valerie-Marie; Reuder, Joachim; Eikill, Rannveig (MDPI, 2017-03-05)
      Wake characteristics are of great importance for wind park performance and turbine loads. While wind tunnel experiments provided a solid base for the basic understanding of the structure and dynamics of wind turbine wakes, ...
      Journal article
    • Circulation and water masses beneath the northern Ronne Ice Shelf, Antarctica 

      Nicholls, Keith W.; Makinson, Keith; Østerhus, Svein (American Geophysical Union, 2004-12-14)
      We present oceanographic data from beneath the northern Ronne Ice Shelf. The data were collected during the austral summer of 2002–2003 from four sites located near the ice front in the Ronne Depression. They consist of ...
      Journal article
    • Comparison of direct covariance flux measurements from an offshore tower and a buoy 

      Flügge, Martin; Bakhoday Paskyabi, Mostafa; Reuder, Joachim; Edson, James B.; Plueddemann, Albert J. (American Meteorological Society, 2016-05)
      Direct covariance flux (DCF) measurements taken from floating platforms are contaminated by wave-induced platform motions that need to be removed before computation of the turbulent fluxes. Several correction algorithms ...
      Journal article
    • A Comparison of LiDAR and Radiosonde Wind Measurements 

      Kumer, Valerie-Marie; Reuder, Joachim; Furevik, Birgitte Rugaard (2014)
      Doppler LiDAR measurements are already well established in the wind energy research and their accuracy has been tested against met mast data up to 100 m above ground. However, the new generation of scanning LiDAR have a ...
      Journal article
    • Complementing Scientific Monsoon Definitions with Social Perception in Bangladesh 

      Reeve, Mathew Alexander; Syed, Mohammed Abu; Spengler, Thomas; Spinney, Jennifer A.; Hossain, Rumana (American Meteorological Society, 2015-01)
      The monsoon onset is a critical event in the Bangladesh calendar, especially for the domestic agricultural sector. Providing information about the monsoon onset for the past, present, and future has potential benefit for ...
      Journal article
    • Connecting ocean heat transport changes from the mid-latitudes to the Arctic Ocean 

      Nummelin, Aleksi; Li, Camille; Hezel, Paul (American Geophysical Union, 2017-02)
      Under greenhouse warming, climate models simulate a weakening of the Atlantic Meridional Overturning Circulation and the associated ocean heat transport at midlatitudes but an increase in the ocean heat transport to the ...
      Journal article
    • Consequences of future increased Arctic runoff on Arctic Ocean stratification, circulation, and sea ice cover 

      Nummelin, Aleksi; Ilicak, Mehmet; Li, Camille; Smedsrud, Lars Henrik (American Geophysical Union (AGU)Wiley, 2016-01-21)
      The Arctic Ocean has important freshwater sources including river runoff, low evaporation, and exchange with the Pacific Ocean. In the future, we expect even larger freshwater input as the global hydrological cycle ...
      Journal article
    • Constraining energetic slope currents through assimilation of high-frequency radar observations 

      Sperrevik, Ann Kristin; Christensen, Kai Håkon; Röhrs, Johannes (Copernicus, 2015-03-11)
      Assimilation of high-frequency (HF) radar current observations and CTD hydrography is performed with the 4D-Var analysis scheme implemented in the Regional Ocean Modeling System (ROMS). We consider both an idealized case, ...
      Journal article
    • Coralline algal Barium as indicator for 20th century northwestern North Atlantic surface ocean freshwater variability 

      Hetzinger, S.; Halfar, J.; Zack, T; Mecking, Jennifer V.; Kunz, B.E.; Jacob, D.E.; Adey, Walter H. (Nature Publishing Group, 2013)
      During the past decades climate and freshwater dynamics in the northwestern North Atlantic have undergone major changes. Large-scale freshening episodes, related to polar freshwater pulses, have had a strong influence on ...
      Journal article
    • Coupled Al-Si geochemistry in an ocean general circulation model: A tool for the validation of oceanic dust deposition fields? 

      Gehlen, M.; Heinze, Christoph; Maier-Reimer, E.; Measures, C. I. (American Geophysical Union, 2003-03-19)
      We introduced the marine cycle of Al into a geochemical ocean general circulation model in order to assess the potential of modeled surface ocean dissolved Al as a tracer for dust input to the world ocean. The geochemical ...
      Journal article
    • Critical vulnerabilities of marine and sea ice–based ecosystems in the high Arctic 

      Johannessen, Ola M.; Miles, Martin W. (Springer, 2010-12-01)
      The objectives of this paper are to summarise: (1) observed 20th-century and projected 21st-century changes in key components of the Arctic climate system and (2) probable impacts on the Arctic marine environment, with ...
      Peer reviewedJournal article
    • Current systematic carbon-cycle observations and the need for implementing a policy-relevant carbon observing system 

      Ciais, Philippe; Dolman, AJ; Bombelli, A; Duren, R; Peregon, A; Rayner, PJ; Miller, C; Gobron, N; Kinderman, G; Marland, G; Gruber, N; Chevallier, F; Andres, RJ; Balsamo, G; Bopp, L; Breon, F-M; Broquet, G; Dargaville, R; Battin, TJ; Borges, A; Bovensmann, H; Buchwitz, M; Butler, J; Canadell, JG; Cook, RB; Defries, R; Engelen, R; Gurney, KR; Heinze, Christoph; Heimann, M; Held, A; Henry, M; Law, B; Luyssaert, S; Miller, J; Moriyama, T; Moulin, C; Myneni, RB; Nussli, C; Obersteiner, M; Ojima, D; Pan, Y; Paris, J-D; Piao, SL; Poulter, B; Plummer, S; Quegan, S; Raymond, P; Reichstein, M; Rivier, L; Sabine, C; Schimel, D; Tarasova, O; Valentini, R; Wang, R; Van, Der,Werf,G; Wickland, D; Williams, M; Zehner, C (Copernicus Publications, 2014-07-03)
      A globally integrated carbon observation and analysis system is needed to improve the fundamental understanding of the global carbon cycle, to improve our ability to project future changes, and to verify the effectiveness ...
      Journal article