Now showing items 387-406 of 862

    • Langmuir Turbulence in the HYCOM Ocean Model 

      Malila, Mika Petteri (Master thesis, 2017)
      The impact of parameterising the turbulent mixing induced by surface wave-driven Langmuir turbulence is investigated for a basin-scale configuration of the hybrid-coordinate ocean circulation model HYCOM. Two-year, non-data ...
    • Large decadal changes in air-sea CO2 fluxes in the Caribbean Sea 

      Wanninkhof, Rik; Triñanes, Joaquin A; Park, Guen-Ha; Gledhill, Dwight K.; Olsen, Are Christian Sviggum (Peer reviewed; Journal article, 2019)
      Sixteen years of surface water CO2 data from autonomous systems on cruise ships sailing in the Caribbean Sea and Western North Atlantic show marked changes on interannual timescales. The measured changes in fugacity (≈partial ...
    • Large-eddy simulation of radiation fog with comprehensive two-moment bulk microphysics: Impact of different aerosol activation and condensation parameterizations 

      Schwenkel, Johannes; Maronga, Bjørn (Peer reviewed; Journal article, 2019-05-29)
      In this paper we study the influence of the cloud microphysical parameterization, namely the effect of different methods for calculating the supersaturation and aerosol activation, on the structure and life cycle of radiation ...
    • Large-Scale Atmospheric Circulation Variability and its Impacts on the Nordic Seas Ocean Climate - a Review. In: The Nordic Seas: An Integrated Perspective 

      Furevik, Tore; Nilsen, Jan Even Øie (Geophysical Monograph Series;158, Chapter, 2005)
      The large-scale atmospheric circulation and its impacts on the Nordic Seas ocean climate are reviewed. The dominant factors for the atmospheric variability are the Icelandic low and the Azores high, determining the strength ...
    • Large‐scale regional model biases in the extra‐tropical North Atlantic storm track and impacts on downstream precipitation 

      Pontoppidan, Marie Louise Nielsen; Kolstad, Erik Wilhelm; Sobolowski, Stefan Pieter; Sorteberg, Asgeir; Changhai, Liu; Rasmussen, Roy (Peer reviewed; Journal article, 2019)
      Global climate models have circulation biases that the community aims to reduce, for instance through high‐resolution dynamical downscaling. We used the Weather Research and Forecasting model (WRF) to downscale both ...
    • A Last Glacial Maximum forcing dataset for ocean modelling 

      Morée, Anne; Schwinger, Jörg (Journal article; Peer reviewed, 2020)
      Model simulations of the Last Glacial Maximum (LGM; ∼ 21 000 years before present) can aid the interpretation of proxy records, can help to gain an improved mechanistic understanding of the LGM climate system, and are ...
    • Late winter response to atmospheric and tidal forcing in the Førdefjord, inferred from mooring observations 

      Hiorth, Katrine (Master thesis, 2018-06-20)
      The Førdefjord is a narrow fjord on the western coast of Norway. A shallow sill is situated at the Ålasund, in the centre part of the fjord. A deep basin, 3 km north of the sill, has been approved as a deposit site for ...
    • Lateral Heat Transport in the Lofoten Basin: Near-Surface Pathways and Subsurface Exchange 

      Dugstad, Johannes Sandanger; Fer, Ilker; Lacasce, Joseph Henry; Sanchez de la Lama, Marta; Trodahl, Marta (Peer reviewed; Journal article, 2019)
      The Lofoten Basin in the Nordic Seas plays a central role in the Atlantic overturning circulation by acting as a reservoir for the warm and saline Atlantic Water flow toward the Arctic Ocean. The mass and heat exchange ...
    • Leads in Arctic pack ice enable early phytoplankton blooms below snow-covered sea ice 

      Assmy, Philipp; Fernández-Méndez, Mar; Duarte, Pedro; Meyer, Amelie; Randelhoff, Achim; Mundy, Christopher John; Olsen, Lasse; Kauko, Hanna M.; Bailey, Allison; Chierici, Melissa; Cohen, Lana; Doulgeris, Anthony Paul; Ehn, Jens K.; Fransson, Agneta; Gerland, Sebastian; Hop, Haakon; Hudson, Stephen R.; Hughes, Nick; Itkin, Polona; Johnsen, Geir; King, Jennifer A.; Koch, Boris P.; Koenig, Zoe; Kwasniewski, Slawomir; Laney, Samuel R.; Nikolaus, Marcel; Pavlov, Alexey K.; Polashenski, Christopher M.; Provost, Christine; Rösel, Anja; Sandbu, Marthe; Spreen, Gunnar; Smedsrud, Lars H.; Sundfjord, Arild; Taskjelle, Torbjørn; Tatarek, Agnieszka; Wiktor, Josef; Wagner, Penelope Mae; Wold, Anette; Steen, Harald; Granskog, Mats A. (Peer reviewed; Journal article, 2017-01-19)
      The Arctic icescape is rapidly transforming from a thicker multiyear ice cover to a thinner and largely seasonal first-year ice cover with significant consequences for Arctic primary production. One critical challenge is ...
    • A Linear Model for Orographic Precipitation in meteorological and climatological downscaling 

      Caroletti, Giulio Nils (Doctoral thesis, 2015-06-24)
      Orographic precipitation has always been a major field of study in atmospheric sciences, because of its major role in the water budget and its influence on environmental hazards like floods and droughts - and thus on human ...
    • The linear stationary wave response to Arctic amplification related heating 

      Sellevold, Raymond (Master thesis, 2015-06-01)
      There has been a raft of manuscripts which claim to show that Arctic amplification (AA) is responsible for changes in the large-scale wintertime midlatitude atmospheric circulation. Responses to these studies have shown ...
    • The link between eddy-driven jet variability and weather regimes in the North Atlantic-European sector 

      Madonna, Erica; Li, Camille; Grams, Christian M; Woollings, Tim (Peer reviewed; Journal article, 2017-10)
      This study reconciles two perspectives on wintertime atmospheric variability in the North Atlantic–European sector: the zonal‐mean framework comprising three preferred locations of the eddy‐driven jet (southern, central, ...
    • Linking Northern High-Latitude Cryospheric Changes to Large-Scale Atmospheric Circulation 

      Knudsen, Erlend Moster (Doctoral thesis, 2015-03-20)
      Warming twice as fast as the rest of the globe, the northern high-latitudes arguably show the clearest evidences of observed and projected climate changes. Two of these are the rapid loss of Arctic sea ice and the shrinking ...
    • Local flow conditions in the Bergen valley based on observations and numerical simulations 

      Valved, Aslaug Skålevik (Master thesis, 2012-10-16)
      The complex topography and variability in surface roughness in the Bergen valley aff-ects the flow conditions in a multitude of ways. The steep mountains give shelter during strong synoptic flow, but the orography of Bergen ...
    • The Lofoten Basin Eddy: three years of evolution as observed by Seagliders 

      Yu, Lusha; Bosse, Anthony; Fer, Ilker; Orvik, Kjell Arild; Bruvik, Erik Magnus; Hessevik, Idar; Kvalsund, Karsten (Peer reviewed; Journal article, 2017-08)
      The Lofoten Basin in the Norwegian Sea is an area where the warm Atlantic Water is subject to the greatest heat losses anywhere in the Nordic Seas. A long-lived, deep, anticyclonic eddy is located in the central part of ...
    • Lofoten eddies observed by Seagliders 

      Løvseth, Hauk Morten (Master thesis, 2018-11-22)
      When the Norwegian Atlantic Current passes the Lofoten Basin, it loses a large amount of mass and heat to mesoscale eddies as a result of instabilities of the mean current along the Norwegian Slope. The eddies subsequently ...
    • Long-term intercomparison of two pCO2 instruments based on ship-of-opportunity measurements in a dynamic shelf sea environment 

      Macovei, Vlad A.; Voynova, Yoana G.; Becker, Meike; Triest, Jack; Petersen, Wilhelm (Journal article; Peer reviewed, 2021)
      The partial pressure of carbon dioxide (pCO2) in surface seawater is an important biogeochemical variable because, together with the pCO2 in the atmosphere, it determines the direction of air–sea carbon dioxide exchange. ...
    • Long-Term Retrospective Analysis of Mackerel Spawning in the North Sea: A New Time Series and Modeling Approach to CPR Data 

      Jansen, Teunis; Kristensen, Kasper; Payne, Mark; Edwards, Martin; Schrum, Corinna; Pitois, Sophie (Peer reviewed; Journal article, 2012-06-21)
      We present a unique view of mackerel (Scomber scombrus) in the North Sea based on a new time series of larvae caught by the Continuous Plankton Recorder (CPR) survey from 1948-2005, covering the period both before and after ...
    • Long-Term Statistics of Observed Bubble Depth Versus Modeled Wave Dissipation 

      Strand, Kjersti Opstad; Breivik, Øyvind; Pedersen, Geir; Vikebø, Frode Bendiksen; Sundby, Svein; Christensen, Kai Håkon (Journal article; Peer reviewed, 2020)
      Air bubble penetration depths are investigated with a bottom‐mounted echosounder at a seabed observatory in northern Norway. We compare a 1‐year time series of observed bubble depth against modeled and estimated turbulent ...
    • Long-term surface pCO2 trends from observations and models 

      Tjiputra, Jerry; Olsen, Are; Bopp, Laurent; Lenton, Andrew; Pfeil, Benjamin; Roy, Tilla; Segschneider, Joachim; Totterdell, Ian; Heinze, Christoph (Peer reviewed; Journal article, 2014-05-19)
      We estimate regional long-term surface ocean pCO2 growth rates using all available underway and bottled biogeochemistry data collected over the past four decades. These observed regional trends are compared with those ...