Now showing items 1-20 of 1091

    • Training a supermodel with noisy and sparse observations: A case study with CPT and the synch rule on SPEEDO-v.1 

      Schevenhoven, Francine Janneke; Carrassi, Alberto (Journal article; Peer reviewed, 2022)
      As an alternative to using the standard multi-model ensemble (MME) approach to combine the output of different models to improve prediction skill, models can also be combined dynamically to form a so-called supermodel. The ...
    • The role of air–sea coupling on November–April intraseasonal rainfall variability over the South Pacific 

      Pariyar, Sunil Kumar; Keenlyside, Noel Sebastian; Tseng, Wan-Ling; Hsu, Huang-Hsiung; Tsuang, Ben-Jei (Journal article; Peer reviewed, 2022)
      We investigate the impact of resolving air-sea interaction on the simulation of the intraseasonal rainfall variability over the South Pacific using the ECHAM5 atmospheric general circulation model coupled with the ...
    • Arctic Ocean Amplification in a warming climate in CMIP6 models 

      Shu, Qi; Wang, Qiang; Årthun, Marius; Wang, Shizhu; Song, Zhenya; Zhang, Min; Qiao, Fangli (Journal article; Peer reviewed, 2022)
      Arctic near-surface air temperature warms much faster than the global average, a phenomenon known as Arctic Amplification. The change of the underlying Arctic Ocean could influence climate through its interaction with sea ...
    • The Role of Mid-latitude Westerly Jet in the Impacts of November Ural Blocking on Early-Winter Warmer Arctic-Colder Eurasia Pattern 

      Xu, Xinping; He, Shengping; Zhou, Botao; Wang, Huijun; Outten, Stephen (Journal article; Peer reviewed, 2022)
      Based on statistical analysis using observations and idealized model simulations, previous studies have revealed the potential response of early-winter atmospheric circulation and temperature anomalies to November Ural ...
    • The impact of turbulence modelling on large offshore wind turbine response 

      Nybø, Astrid (Doctoral thesis, 2022-10-28)
      In order to reduce climate change, a large up-scaling of renewable energy capacity is necessary in the near future. Offshore wind is expected to play a key role in this green shift. The wind conditions offshore are in ...
    • Unfrozen Skewed Turbulence for Wind Loading on Structures 

      Cheynet, Etienne; Daniotti, Nicolo; Jakobsen, Jasna Bogunovic; Snæbjørnsson, Jonas Thor; Wang, Jungao (Journal article; Peer reviewed, 2022)
      The paper introduces an algorithm to generate a three-variate four-dimensional wind turbulence field suited for yawed wind dynamic load simulation. At large yaw angles, a relaxation of Taylor’s hypothesis of frozen turbulence ...
    • A standard protocol for describing the evaluation of ecological models 

      Planque, Benjamin; Aarflot, Johanna Myrseth; Buttay, Lucie; Carroll, JoLynn; Fransner, Sara Filippa Krusmynta; Hansen, Cecilie; Husson, Berengere; Langangen, Øystein Ole Gahr; Lindstrøm, Ulf Ove; Pedersen, Torstein; Primicerio, Raul; Sivel, Elliot Manuarii; Skogen, Morten D.; Strombom, Evelyn; Stige, Leif Christian; Varpe, Øystein; Yoccoz, Nigel (Journal article; Peer reviewed, 2022)
      Numerical models of ecological systems are increasingly used to address complex environmental and resource management questions. One challenge for scientists, managers, and stakeholders is to appraise how well suited these ...
    • Upper-ocean turbulence structure and ocean-ice drag coefficient estimates using an ascending microstructure profiler during the MOSAiC drift 

      Fer, Ilker; Baumann, Till Martin; Koenig, Zoe Charlotte; Muilwijk, Morven; Tippenhauer, Sandra (Journal article; Peer reviewed, 2022)
      Sea ice mediates the transfer of momentum, heat, and gas between the atmosphere and ocean. However, the under-ice boundary layer is not sufficiently constrained by observations. During the Multidisciplinary drifting ...
    • Atlantic water properties, transport and heat loss from mooring observations north of Svalbard 

      Koenig, Zoe Charlotte; Kalhagen, Kjersti; Kolås, Eivind Hugaas; Fer, Ilker; Nilsen, Frank; Cottier, Finlo (Journal article; Peer reviewed, 2022)
      The Atlantic Water inflow to the Arctic Ocean is transformed and modified in the area north of Svalbard, which influences the Arctic Ocean heat and salt budget. Year-round observations are relatively sparse in this region ...
    • Springtime nitrogen oxides and tropospheric ozone in Svalbard: results from the measurement station network 

      Dekhtyareva, Alena; Hermanson, Mark H.; NIkulina, Anna; Hermansen, Ove; Svendby, Tove Marit; Holmén, Kim; Graversen, Rune Grand (Journal article; Peer reviewed, 2022)
      Svalbard is a remote and scarcely populated Arctic archipelago and is considered to be mostly influenced by long-range-transported air pollution. However, there are also local emission sources such as coal and diesel power ...
    • Decadal trends in ocean acidification from the Ocean Weather Station M in the Norwegian Sea 

      Skjelvan, Ingunn; Lauvset, Siv Kari; Johannessen, Truls; Gundersen, Kjell; Skagseth, Øystein (Journal article; Peer reviewed, 2022)
      The Ocean Weather Station M (OWSM) is situated at a fixed position in the Norwegian Sea, one of the major basins of the Nordic Seas, which represents an important area for uptake of atmospheric CO2 as well as deep water ...
    • An investigation into the dynamical and statistical properties of dominant ocean surface waves using close-range remote sensing 

      Malila, Mika Petteri (Doctoral thesis, 2022-09-16)
      Denne avhandlingen er basert på forskningsresultat som behandler statistiske og dynamiske egenskaper av dominante vinddrevne overflatebølger i åpent hav. Med uttrykket dominante bølger refererer vi her til de største ...
    • Upper-ocean hydrography in the Eurasian Basin and its implication on sound speed 

      Stallemo, Astrid (Master thesis, 2022-08-15)
      The Polar Surface Water (PSW) and the Atlantic Water (AW) characteristics and their vertical extent are investigated using data from three moorings deployed in the Nansen Basin, north of Svalbard, under the Coordinated ...
    • Control of Grid Connected Inverter 

      el Habbach, Sami (Master thesis, 2022-08-08)
      Power electronic converters and their control systems have played a significantly important role in the integration of renewable energy systems. The application of these converter systems have been rapidly growing as of ...
    • Bidirectional Dual Active Bridge Converter for Energy Storage Applications 

      Ramsdal, Martin Thormodsæter (Master thesis, 2022-08-08)
      Etterspørselen av energi gjennom vindturbiner og solcelleanlegg har økt i de siste tiårene. En stor ulempe ved disse fornybare energiressursene er deres fluktuerende natur, siden de ikke kan produsere kraft på forespørsel. ...
    • Turbulence in a coastal environment: the case of Vindeby 

      Putri, Rieska Mawarni; Cheynet, Etienne; Obhrai, Charlotte; Jakobsen, Jasna Bogunovic (Journal article; Peer reviewed, 2022)
      The one-point and two-point power spectral densities of the wind velocity fluctuations are studied using the observations from an offshore mast at Vindeby Offshore Wind Farm, for a wide range of thermal stratifications of ...
    • Surface drift in the South Pacific Gyre: Observations and simulations of drifters and plastic 

      Bergland, Astrid (Master thesis, 2022-08-12)
      The objective of this thesis is to investigate the residence times and behavior of microplastics and macroplastics in the southern Pacific Ocean. I use the open- source Lagrangian particle tracking framework OpenDrift to ...
    • Sea-level change over the northern European continental shelf due to atmospheric and oceanic contributions 

      Mangini, Fabio (Doctoral thesis, 2022-09-02)
      Global mean sea level (GMSL) is a key indicator of climate change as it comprises information on different components of the climate system. However, despite its importance for climate and society, GMSL cannot be used for ...
    • Acidification of the Nordic Seas 

      Fransner, Sara Filippa Krusmynta; Fröb, Friederike; Tjiputra, Jerry; Goris, Nadine; Lauvset, Siv Kari; Skjelvan, Ingunn; Jeansson, Emil; Omar, Abdirahman; Chierici, Melissa; Jones, Elizabeth Marie; Fransson, Agneta; Ólafsdóttir, Sólveig R.; Johannessen, Truls; Olsen, Are (Journal article; Peer reviewed, 2022)
      Due to low calcium carbonate saturation states, and winter mixing that brings anthropogenic carbon to the deep ocean, the Nordic Seas and their cold-water corals are vulnerable to ocean acidification. Here, we present a ...
    • Assessing the Norwegian Offshore Wind Resources: Climatology, Power Variability and Wind Farm Siting 

      Solbrekke, Ida Marie (Doctoral thesis, 2022-09-09)
      De norske havvindressursene er fantastiske. Likevel er det ingen operative vindparker i de norske havvområdene. Tatt i betraktning både utslippsmål og forventet økning i elektrisitetsforbruk har regjerningen nå begynt å ...