書誌事項
- 公開日
- 2007-03-29
- 権利情報
-
- https://creativecommons.org/licenses/by/3.0/
- DOI
-
- 10.5194/angeo-25-675-2007
- 公開者
- Copernicus GmbH
説明
<jats:p>Abstract. Spectral width is one of the standard data types produced by the Super Dual Auroral Radar Network (SuperDARN). A pronounced latitudinal gradient in spectral width has been reported in the literature and is used as an empirical proxy for the ionospheric footprint of the open-closed field-line boundary. In this work we investigated the daytime radar echo properties near the spectral width boundary using a multi-frequency sounding regime. We have found that the relatively large spectral width values ≥150 m/s observed poleward of the boundary are produced by ionospheric irregularities with lifetime τl≃10–25 ms, which is essentially independent of the scale size. These irregularities are statistically co-located with low-energy (~100 eV) electron precipitation, which may play a major role in producing F-region turbulence above 75 MLAT via restructuring the ionospheric plasma on time scales ~τl. </jats:p>
収録刊行物
-
- Annales Geophysicae
-
Annales Geophysicae 25 (3), 675-687, 2007-03-29
Copernicus GmbH
