Advances in Radio Science
Advances in Radio Science
ARS
Articles | Volume 24
Articles | Volume 24
https://doi.org/10.5194/ars-24-1-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/ars-24-1-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 24
19 May 2026
 | 19 May 2026

A quarter of a century of polar mesospheric summer echo observations over Andøya: climatology and trends

Ralph Latteck and Franz-Josef Lübken

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Short summary
Using 30 years of radar observations at Andøya, this study presents the world’s longest record of a rare summer phenomenon high above the Arctic. The season lasts about 104 days and is gradually starting earlier and ending later. Even after accounting for solar and geomagnetic effects, a small but steady rise remains. The strongest signals occur about 84 km up and show no long-term change, offering new insight into ongoing shifts in the upper atmosphere.
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