Blar i forfatter "Heiskanen, Tuomas Ilkka Henrikki"

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    • Comparing wavelet and Fourier perspectives on the decomposition of meridional energy transport into synoptic and planetary components 

      Heiskanen, Tuomas Ilkka Henrikki; Graversen, Rune Grand; Rydsaa, Johanne Hope; Isachsen, Pål Erik (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-05-04)
      The Arctic region shows some of the world's most significant signs of climate change; for instance, a negative trend in summer sea‐ice cover of around 15% per decade and Arctic amplified surface‐air warming that is three times the global average. The atmospheric energy transport plays an important role in the Arctic climate. Recently a Fourier‐based method for studying the atmospheric energy transport ...

    • On Atmospheric Energy Transport by Waves 

      Heiskanen, Tuomas Ilkka Henrikki (Master thesis; Mastergradsoppgave, 2018-12-14)
      Recently a new method, based on a Fourier decomposition in the zonal direction, for studying the atmospheric energy transport contribution by planetary and cyclone scale waves has been proposed. Recent studies based on this show that planetary waves contribute more than cyclone scale waves to the atmospheric energy transport into the Arctic. The planetary waves contribute to the Arctic amplification ...

    • On the linkage between atmospheric circulation changes and Arctic climate change 

      Heiskanen, Tuomas Ilkka Henrikki (Doctoral thesis; Doktorgradsavhandling, 2022-06-10)
      Polar amplification is a prominent feature of recent and projected climate change. The Arctic region shows some of the strongest signs of climate change, including sea-ice retreat and temperatures increasing at twice the rate averaged over the northern hemisphere. A major concern for humanity is the sea-level rise associated with the melting of the ice-sheets and glaciers due to climate change. The ...