Search for dissertations about: "Arctic troposphere"

Showing result 1 - 5 of 9 swedish dissertations containing the words Arctic troposphere.

  2. 1. Properties and Origin of Arctic Aerosols

    Author : Ann-Christine Engvall; Jörg Gumbel; Frode Stordal; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Arctic aerosols; Arctic troposphere; air-mass transport; Atmosphere and hydrosphere sciences; Atmosfärs- och hydrosfärsvetenskap; atmosfärvetenskap; Atmospheric Sciences;

    Abstract : The present thesis deals with the origin and physics of aerosols in the Arctic atmosphere. These show a large annual variability due to changes of the photochemical and cloud processes as well as of the synoptic-scale atmospheric pressure patterns. READ MORE

  4. 2. The Arctic Summer Atmosphere

    Author : Cecilia Wesslén; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Arctic; meteorology; reanalysis; clouds; remote sensing;

    Abstract : The Arctic climate has experienced large changes over recent decades, the largest for any region on Earth. To understand the underlying reasons for this climate sensitivity, we need both models and observations. READ MORE

  5. 3. On the recent Arctic Warming

    Author : Rune Grand Graversen; Michael Tjernström; Erland Källén; John Walsh; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Climate change; atmospheric energy transport; Meteorology; Meteorologi; atmosfärvetenskap; Atmospheric Sciences;

    Abstract : The Arctic region attracts considerable scientific interest in these years. Some of the Earth's most pronounced signs of the recent climate change are found here. The summer sea-ice cover is shrinking at an alarming rate. At the same time the region warms faster than the rest of the globe. READ MORE

  6. 4. Impact of Rossby waves on ozone distribution and dynamics of the stratosphere and troposphere

    Author : Grigory Nikulin; Sheila Kirkwood; Ulrike Langematz; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Meteorology; ozone; wave activity; trends; Brewer-Dobson circulation; Rossby waves; Arctic Oscillation; low ozone events; Meteorologi; Meteorology; Meteorologi; Meteorology; meteorologi;

    Abstract : Several physical mechanisms concerning the impact of Rossby waves on ozone distribution and circulation in the stratosphere and troposphere are studied in the thesis.Summertime total ozone variability over Middle Asia and Northern Scandinavia shows similar wave-like behaviour with typical periods of 10-20 days and amplitudes of 20-50 Dobson units. READ MORE

  7. 5. Improving the understanding of cloud radiative heating

    Author : Erik Johansson; Abhay Devasthale; Michael Tjernström; Annica M. L. Ekman; Robert Pincus; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; clouds; radiative effects; upper troposphere-lower stratosphere; atmospheric circulation; remote sensing; atmosfärvetenskap och oceanografi; Atmospheric Sciences and Oceanography;

    Abstract : Clouds play an essential role in regulating Earth’s radiation budget by reflecting and absorbing energy at different spectra. As they interact with radiation, they can radiatively heat or cool the adjacent atmosphere and the surface. READ MORE