Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 42, issue 1
Articles | Volume 42, issue 1
https://doi.org/10.5194/angeo-42-29-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/angeo-42-29-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 42, issue 1
Regular paper
 | 
20 Feb 2024
Regular paper |  | 20 Feb 2024

Observations of polar mesospheric summer echoes resembling kilometer-scale varicose-mode flows

Jennifer Hartisch, Jorge L. Chau, Ralph Latteck, Toralf Renkwitz, and Marius Zecha

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Latest update: 21 Apr 2025
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Short summary
Scientists are studying the mesosphere and lower thermosphere using radar in northern Norway. They found peculiar events with strong upward and downward air movements, happening frequently (up to 2.5 % per month) from 2015 to 2021. Over 700 such events were noted, lasting around 20 min and expanding the studied layer. A total of 17 % of these events had extreme vertical speeds, showing their unique nature.
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Special issue
Special issue on the joint 20th International EISCAT Symposium...