Now showing items 401-420 of 1097

    • Ice and brine production in Hornsund 

      Arntsen, Martin (Master thesis, 2015-06-02)
      The Hornsund fjord system has been studied using observations of the atmosphere, ocean and sea ice, and two different types of models. The study documents significant year to year variability in sea ice formation and brine ...
    • The ice front as a topographic barrier for ocean heat transport 

      Steiger, Nadine (Doctoral thesis, 2021-06-28)
      Antarctic ice shelves are the link between the Southern Ocean and the Antarctic Ice Sheet. The floating ice shelves restrain the seaward flow of the grounded ice, which is balanced by iceberg calving and ocean-induced basal ...
    • Ice shelf water overflow and bottom water formation in the southern Weddell Sea 

      Foldvik, Arne; Gammelsrød, Tor; Østerhus, Svein; Fahrbach, E.; Rohardt, G.; Schröder, Michael; Nicholls, Keith W.; Padman, L.; Woodgate, R. A. (Peer reviewed; Journal article, 2004-02-17)
      Cold shelf waters flowing out of the Filchner Depression in the southern Weddell Sea make a significant contribution to the production of Weddell Sea Bottom Water (WSBW), a precursor to Antarctic Bottom Water (AABW). We ...
    • The Iceland Greenland seas project 

      Renfrew, Ian Alasdair; Pickart, RS; Våge, Kjetil; Moore, GWK; Bracegirdle, TJ; Elvidge, AD; Jeansson, Emil; Lachlan-Cope, T; McRaven, LT; Papritz, L; Reuder, Joachim; Sodemann, Harald; Terpstra, Annick; Waterman, S; Valdimarsson, H; Weiss, A; Almansi, M; Bahr, F; Brakstad, Ailin; Barrell, C; Brooke, JK; Brooks, BJ; Brooks, IM; Brooks, ME; Bruvik, Erik Magnus; Duscha, Christiane; Fer, Ilker; Golid, Heidi M.; Hallerstig, Matilda; Hessevik, Idar; Huang, J; Houghton, L; Jonsson, S; Jonassen, Marius Opsanger; Jackson, Kristin; Kvalsund, Karsten; Kolstad, Erik Wilhelm; Konstali, Kjersti; Kristiansen, Jørn; Ladkin, R; Lin, P; MacRander, A; Mitchell, A; Olafsson, H; Pacini, A; Payne, C; Palmason, B; Perez-Hernandez, MD; Peterson, Algot Kristoffer; Petersen, GN; Pisareva, MN; Pope, JO; Seidl, Andrew; Semper, Stefanie; Sergeev, D; Skjelsvik, Silje; Søiland, Henrik; Smith, D; Spall, MA; Spengler, Thomas; Touzeau, Alexandra; Tupper, G; Weng, Yongbiao; Williams, KD; Yang, X; Zhou, Shenjie (Peer reviewed; Journal article, 2019)
      The Iceland Greenland Seas Project (IGP) is a coordinated atmosphere–ocean research program investigating climate processes in the source region of the densest waters of the Atlantic meridional overturning circulation. ...
    • The Iceland-Faroe Slope Jet: a conduit for dense water toward the Faroe Bank Channel overflow 

      Semper, Stefanie; Pickart, Robert S.; Våge, Kjetil; Larsen, Karin Margretha H.; Hátún, Hjálmar; Hansen, Bogi (Journal article; Peer reviewed, 2020)
      Dense water from the Nordic Seas passes through the Faroe Bank Channel and supplies the lower limb of the Atlantic Meridional Overturning Circulation, a critical component of the climate system. Yet, the upstream pathways ...
    • The Iceland–Faroe inflow of Atlantic water to the Nordic Seas 

      Hansen, Bogi; Østerhus, Svein; Hátún, Hjalmar; Kristiansen, Regin; Larsen, Karin Margretha Húsgarð (Peer reviewed; Journal article, 2003-12)
      The flow of Atlantic water between Iceland and the Faroe Islands is one of three current branches flowing from the Atlantic Ocean into the Nordic Seas across the Greenland–Scotland Ridge. By the heat that it carries along, ...
    • Identifying major drivers of daily streamflow from large-scale atmospheric circulation with machine learning 

      Hagen, Jenny Sjåstad; Leblois, Etienne; Lawrence, Deborah; Solomatine, Dimitri; Sorteberg, Asgeir (Journal article; Peer reviewed, 2021)
      Previous studies linking large-scale atmospheric circulation and river flow with traditional machine learning techniques have predominantly explored monthly, seasonal or annual streamflow modelling for applications in ...
    • Ignition of high-pressure hydrogen releases – Experimental study of impinging and non-impinging releases through a fast-acting valve, with and without a burst disc downstream of the valve 

      Skivenesvåg, Jørgen (Master thesis, 2021-09-14)
      A wide consensus of climate research indicates that anthropogenic greenhouse gas emissions affect the climate and causes the global mean temperature to rise compared to preindustrial levels. International treaties such as ...
    • The Impact of a Reduced High-Wind Charnock Parameter on Wave Growth With Application to the North Sea, the Norwegian Sea, and the Arctic Ocean 

      Breivik, Øyvind; Carrasco, Ana; Haakenstad, Hilde; Aarnes, Ole Johan; Behrens, Arno; Bidlot, Jean-Raymond; Björkqvist, Jan-Victor; Bohlinger, Patrik; Furevik, Birgitte Rugaard; Staneva, Joanna; Reistad, Magnar (Journal article; Peer reviewed, 2022)
      As atmospheric models move to higher resolution and resolve smaller scales, the maximum modeled wind speed also tends to increase. Wave models tuned to coarser wind fields tend to overestimate the wave growth under strong ...
    • Impact of Arctic sea ice variations on winter temperature anomalies in northern hemispheric land areas 

      Köenigk, Torben; Gao, Yongqi; Gastineau, Guillaume; Keenlyside, Noel; Nakamura, Tetsu; Ogawa, Fumiaki; Orsolini, Yvan; Semenov, Vladimir A.; Suo, Lingling; Tian, Tian; Wang, Tao; Wettstein, Justin; Yang, Shuting (Peer reviewed; Journal article, 2018-07-30)
      Coordinated numerical ensemble experiments with six different state-of-the-art atmosphere models have been used in order to evaluate the respective impact of the observed Arctic sea ice and sea surface temperature (SST) ...
    • The impact of assimilating data from a remotely piloted aircraft on simulations of weak-wind orographic flow 

      Ágústsson, Hálfdán; Ólafsson, Haraldur; Jonassen, Marius Opsanger; Rögnvaldsson, Ólafur (Journal article; Peer reviewed, 2014)
      Orographic winds near a 914 m high mountain in Southwest-Iceland are explored using unique observations made aloft with a small remotely piloted aircraft, as well as with traditional observations and high-resolution ...
    • Impact of Assimilation of Radiosonde and UAV Observations from the Southern Ocean in the Polar WRF Model 

      Sun, Qizhen; Vihma, Timo; Jonassen, Marius Opsanger; Zhang, Zhanhai (Journal article; Peer reviewed, 2020)
      Weather forecasting in the Southern Ocean and Antarctica is a challenge above all due to the rarity of observations to be assimilated in numerical weather prediction (NWP) models. As observations are expensive and logistically ...
    • Impact of data assimilation on Eulerian versus Lagrangian estimates of upper ocean transport 

      Sperrevik, Ann Kristin; Röhrs, Johannes; Christensen, Kai Håkon (Peer reviewed; Journal article, 2017)
      Using four-dimensional variational analysis, we produce an estimate of the state of a coastal region in Northern Norway during the late winter and spring in 1984. We use satellite sea surface temperature and in situ ...
    • Impact of late spring Siberian snow on summer rainfall in South-Central China 

      Shen, Haibo; Li, Fei; He, Shengping; Orsolini, Yvan; Li, Jingyi (Journal article; Peer reviewed, 2020)
      Located in the Yangtze River Valley and surrounded by mountains, South-Central China (SCC) frequently suffered from natural disasters such as torrential precipitation, landslide and debris flow. Here we provide corroborative ...
    • The impact of mean state errors on equatorial Atlantic interannual variability in a climate model 

      Ding, Hui; Keenlyside, Noel; Latif, Mojib; Park, Wonsun; Wahl, Sebastian (Peer reviewed; Journal article, 2015-02-23)
      Observations show that the Equatorial Atlantic Zonal Mode (ZM) obeys similar physics to the El Niño Southern Oscillation (ENSO): positive Bjerknes and delayed negative feedbacks. This implies the ZM may be predictable on ...
    • Impact of ocean and sea ice initialisation on seasonal prediction skill in the Arctic 

      Kimmritz, Madlen; Counillon, Francois; Smedsrud, Lars H.; Bethke, Ingo; Keenlyside, Noel; Ogawa, Fumiaki; Wang, Yiguo (Peer reviewed; Journal article, 2019)
      There is a growing demand for skillful prediction systems in the Arctic. Using the Norwegian Climate Prediction Model (NorCPM) that combines the fully-coupled Norwegian Earth System Model and the Ensemble Kalman filter, ...
    • Impact of Snow Initialization in Subseasonal‐to‐Seasonal Winter Forecasts With the Norwegian Climate Prediction Model 

      Li, Fei; Orsolini, Yvan; Keenlyside, Noel; Shen, Mao-Lin; Counillon, Francois; Wang, Yiguo (Peer reviewed; Journal article, 2019)
      Snow initialization has been previously investigated as a potential source of predictability atthe subseasonal‐to‐seasonal (S2S) timescale in winter and spring, through its local radiative,thermodynamical, and hydrological ...
    • Impact of springtime Himalayan-Tibetan Plateau snowpack on the onset of the Indian summer monsoon in coupled seasonal forecasts 

      Senan, Retish; Orsolini, Yvan; Weisheimer, Antje; Vitart, Frédéric; Balsamo, Gianpaolo; Dutra, E.; Doblas-Reyes, Franscisco J.; Basang, Droma (Peer reviewed; Journal article, 2016-02-20)
      The springtime snowpack over the Himalayan–Tibetan Plateau (HTP) region and Eurasia has long been suggested to be an influential factor on the onset of the Indian summer monsoon. To assess the impact of realistic initialization ...
    • The impact of surface currents on the wave climate in narrow fjords 

      Christakos, Konstantinos; Björkqvist, Jan-Victor; Breivik, Øyvind; Tuomi, Laura; Furevik, Birgitte Rugaard; Albretsen, Jon (Journal article; Peer reviewed, 2021)
      This study investigates the effect of surface currents on wind-generated waves in a complex coastal system with narrow fjords. The simulations are based on a phase-averaged wave model forced with surface currents from a ...
    • Impact of the Agulhas Current on Southern Africa Precipitation: A Modeling Study 

      Nkwinkwa, Arielle Stela Imbol; Rouault, Mathieu; Keenlyside, Noel Sebastian; Koseki, Shunya (Journal article; Peer reviewed, 2021)
      The Agulhas Current (AC) creates a sharp temperature gradient with the surrounding ocean, leading to a large turbulent flux of moisture from ocean to atmosphere. We use two simulations of the Weather Research and Forecasting ...