10.18453/rosdok_id00001478 Kiliani, Johannes Johannes Kiliani http://d-nb.info/gnd/1064972322 Universität Rostock 2015 550 Earth sciences 530 Physics 2015 en http://purl.uni-rostock.de/rosdok/id00001478 urn:nbn:de:gbv:28-diss2015-0028-8 Noctilucent clouds (NLC) at the polar summer mesosphere are highly sensitive to atmospheric conditions, therefore they are an important climate indicator. In this thesis, an ice particle model is combined with circulation models to simulate the formation of NLC throughout the particle life cycle: Only 1% of ice particles grow to visible size (50 nm). The main part of particle growth takes place at 83 km altitude, within 6 hours prior to observation and is accompanied by upwelling. By using cylindrical particle shape, the simulated optical signal is made consistent with measurements.