Sökning: "Jacek Stegman"

Hittade 3 avhandlingar innehållade orden Jacek Stegman.

1. 1. Spectroscopic and kinetic studies of atmospheric oxygen emissions

   Författare :Jacek Stegman; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : The terrestrial night sky spectrum Is dominated by emission features related to oxygen photochemistry. Photodissociation of molecular oxygen, the second most abundant atmospheric constituent Is the most efficient channel for converting solar electromagnetic radiation into chemical energy. LÄS MER

3. 2. Noctilucent clouds in a coupled atmosphere

   Författare :Bodil Karlsson; Peter Sigray; Jacek Stegman; Scott Bailey; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Noctilucent clouds; atmospheric dynamics; Meteorology; Meteorologi; atmosfärvetenskap; Atmospheric Sciences;

   Sammanfattning : Noctilucent clouds (NLC) at altitudes around 80 km are the highest clouds in our atmosphere. They have been a subject of research ever since their discovery in the late 19th century. This thesis takes an important step towards using NLC as a tool for studying dynamic coupling processes in the atmosphere on a global scale. LÄS MER

4. 3. Observations of water vapour in the middle atmosphere

   Författare :Stefan Lossow; Jörg Gumbel; Jacek Stegman; Daniel R. Marsh; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; water vapour; mesosphere; stratosphere; dynamics; Odin satellite; limb sounding; microwave; tropics; polar winter; Meteorology; Meteorologi; meteorologi; Meteorology;

   Sammanfattning : Water vapour is the most important greenhouse gas and plays a fundamental role in the climate system and for the chemistry of the Earth's atmosphere. This thesis presents observations of water vapour in the middle atmosphere with a particular focus on the mesosphere. LÄS MER