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Viser treff 1-20 av 1022

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    • 100-year waves in the Mozambique Channel 

      Kulseng, Rasmus Kanstad (Master thesis, 2010-06-01)
      Six-hourly significant wave height (SWH) data covering the period September 1957 to August 2002 is obtained from the ERA-40 reanalysis. This data, generated by ECMWF's own configured global WAM model, stems from the first ...
    • The 11 year solar cycle UV irradiance effect and its dependency on the Pacific Decadal Oscillation 

      Guttu, Sigmund; Orsolini, Yvan J.; Stordal, Frode; Otterå, Odd Helge; Omrani, Nour-Eddine (Journal article; Peer reviewed, 2021)
      The stratospheric, tropospheric and surface impacts from the 11 year ultraviolet solar spectral irradiance (SSI) variability have been extensively studied using climate models and observations. Here, we demonstrate using ...
    • 2018 International Atmospheric Rivers Conference : Multi‐disciplinary studies and high‐impact applications of atmospheric rivers 

      Ramos, Alexandre; Wilson, Anna; DeFlorio, Michael; Barnes, Elizabeth A.; Garreaud, Rene; Gorodetskaya, Irina V.; Lavers, David A; Moore, Benjamin; Payne, Ashley; Smallcomb, Chris; Sodemann, Harald; Wehner, Michael; Ralph, Fred Martin (Peer reviewed; Journal article, 2019-07-26)
      Atmospheric rivers (ARs) play a vital role in shaping the hydroclimate of many regions globally, and can substantially impact water resource management, emergency response planning, and other socioeconomic entities. The ...
    • 2020/21 record-breaking cold waves in east of China enhanced by the ‘Warm Arctic-Cold Siberia’ pattern 

      Zhang, Yijia; Yin, Zhicong; Wang, Huijun; He, Shengping (Journal article; Peer reviewed, 2021)
      Extreme cold waves frequently occur in east of China that dramatically endanger ecological agriculture, power infrastructure and human life. In this study, we found that the 'Warm Arctic-Cold Siberia' pattern (WACS) ...
    • 230Th Normalization: New Insights on an Essential Tool for Quantifying Sedimentary Fluxes in the Modern and Quaternary Ocean 

      Costa, Kassandra M.; Hayes, Christopher T.; Anderson, Robert F.; Pavia, Frank J.; Bausch, Alexandra; Deng, Feifei; Dutay, Jean-Claude; Geibert, Walter; Heinze, Christoph; Henderson, Gideon M.; Hillaire-Marcel, Claude; Hoffmann, Sharon; Jaccard, Samuel L.; Jacobel, Allison W.; Kienast, Stephanie S.; Kipp, Lauren; Lerner, Paul; Lippold, Jörg; Lund, David; Marcantonio, Franco; McGee, David; McManus, Jerry F.; Mekik, Figen; Middleton, Jennifer L.; Missiaen, Lise; Not, Christelle; Pichat, Sylvain; Robinson, Laura F.; Rowland, George H.; Roy‐Barman, Matthieu; Tagliabue, Alessandro; Torfstein, Adi; Winckler, Gisela; Zhou, Yuxin (Journal article; Peer reviewed, 2020-01)
      230Th normalization is a valuable paleoceanographic tool for reconstructing high‐resolution sediment fluxes during the late Pleistocene (last ~500,000 years). As its application has expanded to ever more diverse marine ...
    • 3D mechanical and thermal analysis of an Aluminium piston for a high-speed Diesel laboratory engine 

      Haugland, Steinar Søvde (Master thesis, 2018-06-22)
      A cast aluminium piston of a single cylinder Petter Diesel engine is modelled using the finite element method. The engine is intended to be supercharged, which will increase the thermal loading on the piston, and so the ...
    • The 3 km Norwegian reanalysis (NORA3) – a validation of offshore wind resources in the North Sea and the Norwegian Sea 

      Solbrekke, Ida Marie; Sorteberg, Asgeir; Haakenstad, Hilde (Journal article; Peer reviewed, 2021)
      We validate a new high-resolution (3 km) numerical mesoscale weather simulation for offshore wind power purposes for the time period 2004–2016 for the North Sea and the Norwegian Sea. The 3 km Norwegian reanalysis (NORA3) ...
    • A 4.5 Year‐Long Record of Svalbard Water Vapor Isotopic Composition Documents Winter Air Mass Origin 

      Steen-Larsen, Hans Christian (Journal article; Peer reviewed, 2020)
      From May 2014 to September 2018, a laser spectrometer analyzer provided a 4.5 years continuous record of water vapor isotopic composition at Ny-Ålesund (8 m above sea level, a.s.l.), Svalbard. It corresponds to the longest ...
    • A comparative study of Doubly Fed Asynchronous and Synchronous Generators in a wind energy perspective 

      Eide, Rainer Spyridon Moyzakitis (Master thesis, 2019-06-15)
      Dette masterstudiet fokuserer på analyse av vindkraft-generatorer. Det er et sammenligningsstudie av den dobbel-matede asynkrongeneratoren og synkrongeneratorer, hvor effektivitet, driftsforhold og økonomiske perspektiv ...
    • A NAWDEX case study: Water vapor transport in atmospheric rivers and quantifying hand over of moisture between extratropical cyclones 

      Ekrem, Petter (Master thesis, 2020-10-31)
      Meridional water vapor transport occurs predominantly within the warm sector of extratropical cyclones. The warm sector is seperated by the cyclone's warm front ahead, and the cold front behind. In this region the warm ...
    • Advances in understanding and parameterization of small-scalephysical processes in the marine Arctic climate system: a review 

      Vihma, Timo; Pirazzini, R; Fer, Ilker; Renfrew, I.A.; Sedlar, J.; Tjernström, M.; Lüpkes, C.; Nygård, T.; Notz, D.; Weiss, J.; Marsan, D.; Cheng, B.; Birnbaum, G.; Gerland, S; Chechin, D.; Gascard, J.-C. (Peer reviewed; Journal article, 2014-09-10)
      The Arctic climate system includes numerous highly interactive small-scale physical processes in the atmosphere, sea ice, and ocean. During and since the International Polar Year 2007–2009, significant advances have been ...
    • Aerodynamic study of a suspension bridge deck by CFD simulations, wind tunnel tests and full-scale observations 

      Kusano, Ibuki; Cheynet, Etienne; Jakobsen, Jasna Bogunovic; Snæbjörnsson, Jonas Thor (Journal article; Peer reviewed, 2021)
      Assessing the aerodynamic characteristics of long-span bridges is fundamental for their design. Depending on the terrain complexity and local wind conditions, episodes of large angles of attack (AoA) of 15° may be observed. ...
    • Air-Sea Interaction in Biophysical Modeling: With focus on Northeast Arctic Cod 

      Strand, Kjersti Opstad (Doctoral thesis, 2019-02-15)
      The focus of this thesis is on upper ocean dynamics and the interactions between the atmosphere and the oceans in relation to early life stages of Northeast Arctic cod. The main spawning sites of Northeast Arctic cod are ...
    • Air-Sea Interactions during Cold Air Outbreaks in a coupled Mixed Layer Model 

      Konstali, Kjersti (Master thesis, 2019-06-19)
      Cold air outbreaks play a crucial role in the air-sea heat exchange in high latitudes. To explore the sensitivity to ocean coupling, the role of latent heating and the sensitivity to sea ice distributions in cold air ...
    • Airborne Field Measurements and Model Simulations of Boundary Layer Properties over the Iceland Sea 

      Golid, Heidi Midtgarden (Master thesis, 2019-06-28)
      The spatial and temporal distributions of a cold air outbreak (CAO) event over the Iceland- and southern Greenland Seas have been investigated during the IcelandGreenland Seas project (IGP) in February and March 2018. This ...
    • Airborne observations of the Eyjafjalla volcano ash cloud over Europe during air space closure in April and May 2010 

      Schumann, U.; Weinzierl, B; Reitebuch, O; Schlager, H.; Minikin, A; Forster, C; Baumann, R; Sailer, T; Graf, K; Mannstein, H.; Voigt, C; Rahm, S; Simmet, R; Scheibe, M; Lichtenstern, M; Stock, P; Ruba, H; Schauble, D; Tafferner, A; Rautenhaus, M; Gerz, T; Ziereis, H; Krautstrunk, M; Mallaun, C; Gayet, JF; Lieke, K; Kandler, K; Ebert, M; Weinbruch, S; Stohl, Andreas; Gasteiger, J; Gross, S; Freudenthaler, V; Wiegner, M; Ansmann, A; Tesche, M; Ólafsson, Haraldur; Sturm, K (Peer reviewed; Journal article, 2011-03-11)
      Airborne lidar and in-situ measurements of aerosols and trace gases were performed in volcanic ash plumes over Europe between Southern Germany and Iceland with the Falcon aircraft during the eruption period of the Eyjafjalla ...
    • Aircraft-based observations and high-resolution simulations of an Icelandic dust storm 

      Blechschmidt, Anne-Marlene; Kristjansson, Jon Egill; Ólafsson, Haraldur; Burkhart, John; Hodnebrog, Øivind; Rosenberg, P.D. (Peer reviewed; Journal article, 2012-11-16)
      The first aircraft-based observations of an Icelandic dust storm are presented. The measurements were carried out over the ocean near Iceland's south coast in February 2007. This dust event occurred in conjunction with an ...
    • Akvakultur og små vindturbinar: Eit moglegheitsstudie av i kva grad små vindturbinar kan dekkje energiforbruket ved norske oppdrettsanlegg 

      Wiken, Laura Steinsbø (Master thesis, 2018-06-21)
      The world’s population is growing rapidly, and it will become necessary, to a greater extent, to use the ocean for harvesting food. Norway is the largest exporter of salmon in the world. Prognosis says that aquaculture in ...
    • Along‐stream, seasonal, and interannual variability of the North Icelandic Irminger Current and East Icelandic Current around Iceland 

      Casanova-Masjoan, M; Perez-Hernandez, MD; Pickart, Robert S.; Valdimarsson, Héðinn; Ólafsdóttir, SR; Macrander, Andreas; Grisolía-Santos, D; Torres, Daniel J.; Jónsson, Steingrímur; Våge, Kjetil; Lin, Peigen; Hernández-Guerra, A (Journal article; Peer reviewed, 2020)
      Data from repeat hydrographic surveys over the 25-year period 1993 to 2017, together with satellite altimetry data, are used to quantify the temporal and spatial variability of the North Icelandic Irminger Current (NIIC), ...
    • Amplification of synoptic to annual variability of West African summer monsoon rainfall under global warming 

      Akinsanola, Akintomide Afolayan; Zhou, Wen; Zhou, Tianjun; Keenlyside, Noel (Journal article; Peer reviewed, 2020)
      Increased knowledge of future changes in rainfall variability is needed to reduce vulnerability to potential impacts of global warming, especially in highly vulnerable regions like West Africa. While changes in mean and ...

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