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- Title
High-latitude mesospheric intense turbulence associated with high-speed solar wind streams.
- Authors
Lee, Young-Sook; Kim, Kyung-Chan; Kwak, Young-Sil; Kim, Yongha
- Abstract
Intense turbulence is frequently observed in the polar mesosphere summer echoes (PMSE) from the data of very high frequency radar operating at Esrange, Sweden. The turbulence can be estimated from the turbulent energy dissipation rate (ϵ ) by considering aspect sensitivity. We find that variation in turbulence at altitude 82–86 km is in a good correlation with enhanced geomagnetic disturbances and precipitating energetic electrons into the mesosphere induced by high-speed solar wind streams. In addition, intense turbulence (a few tens of mW/kg) frequently occurs in the common volume with large plasma/neutral horizontal speeds (≥ 150 m s − 1 ) at 82–90 km altitudes. The large velocities are ready to form wind shear/shift. Therefore, we suggest that the summer mesospheric turbulence is to a significant extent accompanied by large plasma/neutral velocities and wind shear in the mesosphere, in turn linked to solar wind energy input during geomagnetic disturbances.
- Subjects
SWEDEN; PLASMA turbulence; SOLAR wind; TURBULENCE; WIND shear; WIND power; SOLAR energy; WIND speed
- Publication
Astrophysics & Space Science, 2019, Vol 364, Issue 11, p1
- ISSN
0004-640X
- Publication type
Article
- DOI
10.1007/s10509-019-3691-0