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Visar resultat 1 - 5 av 16 uppsatser som matchar ovanstående sökkriterier.

  1. 1. Climate driven variability of wind energy over Europe

    Master-uppsats, KTH/Hållbar utveckling, miljövetenskap och teknik

    Författare :Kévin Walcarius; [2021]
    Nyckelord :;

    Sammanfattning : In the following report, two methods of wind downscalling are applied to reanalysed 10-m wind speed data from the ERA5 reanalysis of ECMWF, in order to derive wind speed data from 01/01/1979 till 31/12/2019 at the location of onshore wind farms from the ”World Wind Farm Database”.  Being unable to use complex downscalling methods such as Generalisation (WAsP method- ology) nor Kriging interpolation, the study has been restricted to simple downscalling methods. LÄS MER

  3. 2. Analysis of Observed Discrepancies in Precipitation Measurements in the Complex Terrain of East-Iceland

    Master-uppsats, Uppsala universitet/Luft-, vatten- och landskapslära

    Författare :Páll Ágúst Þórarinsson; [2021]
    Nyckelord :Precipitation; precipitation measurements; weather observation; complex terrain; weather regimes; Iceland; Nederbörd; nederbördmätningar; väder observationer; komplex terräng; vädersituationen; Island;

    Sammanfattning : Spatial distribution of precipitation in complex terrain can be very uneven and there are many factors to consider when studying it. The goal of this study was such a problem; to analyse the difference in observed annual precipitation in the complex terrain of Seyðisfjörður, a fjord in East-Iceland. The study was carried out in three parts. LÄS MER

  4. 3. Differences and Similarities between Extratropical Cyclones during Summer and Winter

    Kandidat-uppsats, Lunds universitet/Förbränningsfysik; Lunds universitet/Fysiska institutionen

    Författare :Stina Olandersson; [2016]
    Nyckelord :Extratropical cyclones; cyclogenesis; jet; quasi-geostrophic theory; North Atlantic Ocean; GFS; Physics and Astronomy;

    Sammanfattning : Extratropical cyclones (ETC) are synoptic scale low pressure systems, which have a large impact on the weather in the mid latitudes. These low pressure systems usually develop during several days and are connected to fronts. Thus, they can bring cloudiness, rain and even severe weather including strong winds. LÄS MER

  5. 4. Stormar i Sydsverige

    Kandidat-uppsats, Lunds universitet/Fysiska institutionen

    Författare :Jenny Burman; [2014]
    Nyckelord :Meteorologi; Stormar; Geostrofisk vind; Physics and Astronomy;

    Sammanfattning : Many people believe that there are more windstorms today than before. In order to find out, it requires knowing what defines a windstorm: the average wind speed must exceed 24,4 m/s to be classed as a windstorm. The average wind speed is measured for a 10 minute period. LÄS MER

  7. 5. Uppskattning av vindklimat – Implementering och utvärdering av en metod för normalårskorrektion

    Kandidat-uppsats, Uppsala universitet/Luft-, vatten- och landskapslära

    Författare :Irene Helmersson; [2010]
    Nyckelord :Normal year correction; season dependence; wind direction dependence; NCAR NCEP; Normalårskorrigering; NCAR NCEP; säsongsberoende; vindriktningsberoende;

    Sammanfattning : The expected technical lifetime for a wind turbine is 20-25 years (Wizelius, 2007). In the process of planning a wind farm on a site an estimation of the average wind speed and the energy yield is required from the site. LÄS MER