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Jennifer Hartisch

On kilometer-scale varicose-mode flows in the polar summer mesosphere

Universität Rostock, 03.09.2025

https://doi.org/10.18453/rosdok_id00005756

Abstract: The mesosphere and lower thermosphere are difficult to access due to their altitude and complex dynamics. Motivated by an observation of a varicose structure with extreme vertical wind velocities, PMSE data from MAARSY (2015–2021) were analyzed. More than 700 events were identified, and four pronounced cases were examined in detail using complementary wind, temperature, and aspect sensitivity data. The results show varicose structure as a recurrent and previously underestimated phenomenon in the polar mesosphere, with bore-like features and links to wind shear and temperature inversions.

doctoral thesis   free access