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Journal Paper

전체
High-latitude mesospheric intense turbulence associated with high-speed solar wind streams SCI
  • Young-Sook Lee; Kyung-Chan Kim; Young-Sil Kwak; et al.
  • 2019-11-22
  • ASTROPHYSICS AND SPACE SCIENCE 364 11 : 210-1~210-10
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 ( ? ) 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 ms?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.