Sökning: "Rossby waves"

Hittade 4 uppsatser innehållade orden Rossby waves.

  1. 1. NH Planetary-Scale Circulation in Troposphere and Stratosphere: A Spectral and Dynamical Perspective

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

    Författare :Michael Konrad Schutte; [2023]
    Nyckelord :jet stream; Rossby waves; polar vortex; spectral analysis; dynamic systems theory; sudden stratospheric warmings; strong polar vortex events; jetström; Rossbyvågor; polär virvel; spektralanalys; dynamisk systemteori; plötsliga stratosfäriska uppvärmingar; starka polvortexhändelser;

    Sammanfattning : Dynamic Systems Theory (DST) and spectral analysis are employed to study the tropospheric jet stream and the stratospheric polar vortex. The objective is to investigate the relationship between Rossby wave activity and inverse persistence and dimensionality of geopotential height at 250 hPa and 10 hPa, as these two dynamical indicators are expected to show a characteristic behavior of Rossby wave harmonics. LÄS MER

  3. 2. Analysis of High and Low Rossby Wave Phase Speed Events Over Northern Mid-Latitudes

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

    Författare :Emma Rosengren; [2022]
    Nyckelord :Rossby waves; phase speed; atmospheric blocking; storm track; windstorms; Rossbyvågor; fashastighet; atmosfärisk blockering; lågtrycksbana; vindstormar;

    Sammanfattning : The large-scale, mid-latitude circulation in the upper troposphere is dominated by Rossby waves. The jet stream flows along the wave structure and surface cyclones can be found ahead of the troughs of the waves, propagating eastward. LÄS MER

  4. 3. Large-Scale Atmospheric Drivers of Extreme Temperature Anomalies During Springtime in the Arctic

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

    Författare :Linnea Barreng; [2022]
    Nyckelord :Meteorology; Temperature extremes; Arctic; Jet stream; Rossby waves; Spring; Meteorologi; Arktis; Extremväder; Jetström; Rossbyvågor; Vår;

    Sammanfattning : In this project warm extreme temperature events in the Arctic region during the spring months March, April and May were identified and analysed. In the analysis daily average NCEP reanalysis data from NOAA/OAR/ESRL PSL format was used. LÄS MER

  5. 4. Modelling the Formation and Propagation of Orographic Rossby Waves

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

    Författare :Eskil Jonsson; [2017]
    Nyckelord :Global model; shallow fluid approximation; middle-high troposphere; potential vorticity conservation; Global modell; grund fluid approximation; mellan-övre troposfären; potentiell vorticitetsbevarande;

    Sammanfattning : Orographic Rossby waves are the main mechanism by which the jet streams meander aroundthe Earth and have possibly far-reaching impacts on weather and climate (chapter 1). Hence,they are of particular importance to study and this project should serve as a starting point inwhat to consider when trying to model these waves. LÄS MER