Blar i Geophysical Institute på tittel

Viser treff 1166-1185 av 1300

    • Towards Retrieving Reliable Ocean Surface Currents in the Coastal Zone From the Sentinel-1 Doppler Shift Observations 

      Moiseev, Artem; Johannessen, Johnny Andre; Johnsen, Harald (Journal article; Peer reviewed, 2022)
      Recent developments on calibration and partitioning of the signal between the wave and current contributions significantly improve the accuracy of geophysical retrievals from Sentinel-1 Synthetic Aperture Radar-based Doppler ...

    • Tracer-derived transit time of the waters in the eastern Nordic Seas 

      Gao, Yongqi; Drange, Helge; Bentsen, Mats; Johannessen, Ola M. (Peer reviewed; Journal article, 2005-08-25)
      The spatial-temporal distribution of the anthropogenic radionuclide 137Cs originating from nuclear bomb testing and the Sellafield reprocessing plant in the Irish Sea is simulated using a global version of the Miami Isopycnic ...

    • Tracing Lower Cretaceous organic-rich units across the SW Barents Shelf 

      Hagset, Andreas Hallberg; Grundvåg, Sten-Andreas; Badics, Balazs; Davies, R; Rotevatn, Atle (Journal article; Peer reviewed, 2022)
      On the Barents Shelf, the northernmost and least explored hydrocarbon province of the Norwegian Continental Shelf, Upper Jurassic organic-rich shales have traditionally been given most attention as these represent the most ...

    • Tracing the Imprint of River Runoff Variability on Arctic Water Mass Transformation 

      Lambert, Erwin; Nummelin, Aleksi; Pemberton, Per; Ilicak, Mehmet (Peer reviewed; Journal article, 2019-01-14)
      The Arctic Ocean receives a net freshwater input from land and from the atmosphere. This flux of freshwater, along with net surface heat loss, acts to transform the water mass properties of inflowing Atlantic and Pacific ...

    • Tracking Summer Extra-Tropical Storms: A Climatological Overview and Variability in the Northern Hemisphere 

      Mesquita, Michel dos Santos (Master thesis, 2006-05-04)

    • 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 ...

    • Training of supermodels - in the context of weather and climate forecasting 

      Schevenhoven, Francine (Doctoral thesis, 2021-02-08)
      Given a set of imperfect weather or climate models, predictions can be improved by combining the models dynamically into a so called `supermodel'. The models are optimally combined to compensate their individual errors. ...

    • Transient response of the Atlantic Meridional Overturning Circulation to enhanced freshwater input to the Nordic Seas–Arctic Ocean in the Bergen Climate Model 

      Otterå, Odd Helge; Drange, Helge; Bentsen, Mats; Kvamstø, Nils Gunnar; Jiang, Dabang (Tellus A;56(4), Journal article, 2004-07-09)
      The transient response of the climate system to anomalously large freshwater input to the high latitude seas is examined using the newly developed Bergen Climate Model. A 150-yr twin-experiment has been carried out, ...

    • Transientstabilitet-implementering ved BESS for offshore mikronett i øymodus 

      Primstad, Ingri (Master thesis, 2022-06-01)
      Konvensjonelle mikronett har tradisjonelt sikret spenning- og frekvensstabilitet med spinning-reserve fra roterende maskiner ved forstyrrelser i nettet. En økende andel av ikke-roterende energiproduksjon påvirker kraftsystemers ...

    • Transitioning remote Arctic settlements to renewable energy systems – A modelling study of Longyearbyen, Svalbard 

      Ringkjøb, Hans-Kristian; Haugan, Peter M.; Nybø, Astrid (Journal article; Peer reviewed, 2020)
      As transitioning away from fossil fuels to renewable energy sources comes on the agenda for a range of energy systems, energy modelling tools can provide useful insights. If large parts of the energy system turns out to ...

    • Transport of inorganic carbon through, within, and below the ocean surface 

      Lauvset, Siv Kari (Doctoral thesis, 2011-03-11)
      Human emissions of CO2 through the burning of fossil fuel, cement production, and land use change have increased the atmospheric CO2 concentration by 39 % since 1750. Without the large uptake of anthropogenic CO2 by the ...

    • Transport Upscaling in Porous Media 

      Nedreli, Anette Cathrine (Master thesis, 2014-06-02)
      Numerical models are important for modeling what happens in porous media. In this thesis we will simulate the heat transport in geothermal reservoirs. Because these reservoirs are usually quite large, we will make a model ...

    • Trapped tidal currents generate freely propagating internal waves at the Arctic continental slope 

      Baumann, Till Martin; Fer, Ilker (Journal article; Peer reviewed, 2023)
      Energetic tidal currents in the Arctic play an important role in local mixing processes, but they are primarily confined to the shelves and continental slopes due to topographic trapping north of their critical latitude. ...

    • Trends and drivers in global surface ocean pH over the past 3 decades 

      Lauvset, Siv Kari; Gruber, Nicolas; Landschützer, Peter; Olsen, Are; Tjiputra, Jerry (Peer reviewed; Journal article, 2015-03-02)
      We report global long-term trends in surface ocean pH using a new pH data set computed by combining fCO2 observations from the Surface Ocean CO2 Atlas (SOCAT) version 2 with surface alkalinity estimates based on temperature ...

    • Trends and internal variability in Brazilian hydropower catchments 

      Byermoen, Emilie (Master thesis, 2023-06-01)
      Hydropower is a major energy source in Brazil, and long-term hydropower production planning is crucial both for maintaining energy and water security in the country. The amount of water that is available to electricity ...

    • Trends in extreme precipitation and the influence by meteorological parameters following the RCP8.5 scenario over 2 catchments in India 

      Soldal, Ingri Halland (Master thesis, 2015-06-02)
      The Historical1 simulation (1960-2000) and the RCP8.5 scenario (2060-2100) from the NorESM are used to investigate trends in extreme precipitation, as well as the impact from vertical velocity, specific humidity, divergence ...

    • Trends of Ocean Acidification and pCO2 in the Northern North Sea, 2003-2015 

      Omar, Abdirahman; Thomas, Helmuth; Olsen, Are; Becker, Meike; Skjelvan, Ingunn; Reverdin, Gilles (Peer reviewed; Journal article, 2019-10-29)
      For continental shelf regions, the long‐term trend in sea surface carbon dioxide (CO2) partial pressure (pCO2) and rates of ocean acidification are not accurately known. Here, we investigate the decadal trend of observed ...

    • Trivial gain of downscaling in future projections of higher trophic levels in the Nordic and Barents Seas 

      Nilsen, Ina; Fransner, Sara Filippa Krusmynta; Olsen, Are; Tjiputra, Jerry; Hordoir, Robinson; Hansen, Cecilie (Journal article; Peer reviewed, 2023)
      Downscaling physical forcing from global climate models is both time consuming and labor demanding and can delay or limit the physical forcing available for regional marine ecosystem modelers. Earlier studies have shown ...

    • The tropical Atlantic observing system 

      Foltź, Gregory R.; Brandt, Peter; Richter, Ingo; Rodriguez-fonseca, Belen; Hernandez, Fabrice; Dengler, Marcus; Rodrigues, Regina R.; Schmidt, Jörn O.; Yu, Lisan; Lefevre, Nathalie; Da Cunha, Leticia Cotrim; McPhaden, Michael J.; Araujo Filho, Moacyr C.; Karstensen, Johannes; Hahn, Johannes; Martín-Rey, Marta; Patricola, Christina M.; Poli, Paul; Zuidema, Paquita; Hummels, Rebecca; Perez, Renellys C.; Hatje, Vanessa; Lübbecke, Joke; Polo, Irene; Lumpkin, Rick; Bourles, Bernard; Asuquo, Francis E.; Lehodey, Patrick; Conchon, Anna; Chang, Ping; Dandin, Philippe; Schmid, Claudia; Sutton, Adrienne J.; Giordani, Herve; Xue, Yan; Illig, Serena; Losada, Teresa; Grodsky, Semyon; Gasparin, Florent; Lee, Tong; Mohino, Elsa; Nobre, Paulo; Wanninkhof, Rik; Keenlyside, Noel; Garcon, Veronique; Sánchez-Gómez, Emilia; Nnamchi, Hyacinth C.; Drévillon, Marie; Storto, Andrea; Remy, Elisabeth; Lazar, Alban; Speich, Sabrina; Goes, Marlos P.; Dorrington, Tarquin; Johns, William E.; Moum, James N.; Robinson, Carol; Perruche, Coralie; Souza, Ronald B.; Gaye, Amadou; López-Parages, Jorge; Monerie, Paul-Arthur; Castellanos, Paola; Benson, Nsikak U.; Hounkonnou, Mahouton N.; Duhá, Janice T.; Laxenaire, Rémi; Reul, Nicolas (Peer reviewed; Journal article, 2019-05-10)
      The tropical Atlantic is home to multiple coupled climate variations covering a wide range of timescales and impacting societally relevant phenomena such as continental rainfall, Atlantic hurricane activity, oceanic ...

    • Tropical Atlantic variability: Observations and modeling 

      Cabos, William; de la Vara, Alba; Koseki, Shunya (Peer reviewed; Journal article, 2019-08-27)
      We review the state-of-the-art knowledge of Tropical Atlantic Variability (TAV). A well-developed observing system and sustained effort of the climate modeling community have improved our understanding of TAV. It is dominated ...