Two decades of long-term observations of polar mesospheric echoes at 69 N

R Latteck, T Renkwitz, JL Chau - Journal of Atmospheric and Solar …, 2021 - Elsevier
Since 1999 radar continuous observations of polar mesospheric echoes have been
conducted on the Norwegian island of Andøya (69.30° N, 16.04° E), with the ALWIN radar …

Weakening of polar mesosphere winter echo and turbulent energy dissipation rates after a stratospheric sudden warming in the southern hemisphere in 2019

M Kohma, K Sato, K Nishimura… - Geophysical Research …, 2021 - Wiley Online Library
Time variations in the polar mesosphere winter echo (PMWE) volume reflectivity and
turbulent energy dissipation rates are examined during the sudden stratospheric warming …

Characterization of polar mesospheric VHF radar echoes during solar minimum winter 2019/2020. Part I: Ionisation

T Renkwitz, R Latteck, I Strelnikova… - Journal of Atmospheric …, 2021 - Elsevier
The exceptionally solar and geomagnetic quiet winter of 2019–2020 provides a very useful
scenario to study polar mesospheric radar echoes. Such a condition limits the impact of …

[PDF][PDF] 東京大学 大学院理学系研究科 地球惑星科学専攻

Y Minamihara - 2021 - repository.dl.itc.u-tokyo.ac.jp
It is well known that atmospheric Rossby waves (RWs) and gravity waves (GWs) excited
mainly in the troposphere, propagate upward, and drive the general circulation in the middle …