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SuperDARN observations of daytime MSTIDs in the auroral and mid‐latitudes: Possibility of long‐distance propagation
Author(s) -
Ishida T.,
Hosokawa K.,
Shibata T.,
Suzuki S.,
Nishitani N.,
Ogawa T.
Publication year - 2008
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2008gl034623
Subject(s) - daytime , ionosphere , geophysics , low latitude , middle latitudes , latitude , geology , dissipation , f region , atmospheric sciences , phase velocity , geodesy , physics , optics , thermodynamics
The propagation parameters of daytime medium‐scale traveling ionospheric disturbances (MSTIDs) are investigated for the first time using near‐simultaneous SuperDARN radar data obtained at auroral and middle latitudes. The observations suggest that MSTIDs can propagate from auroral to mid‐latitudes with persistent propagation parameters if the dominant propagation direction is approximately equatorward. However, statistical analysis implies that a portion of MSTIDs with higher horizontal phase velocity are unable to reach the mid‐latitude due to enhanced dissipation and the reduction of the ion‐drag effect.