High‐resolution observations of the small‐scale flow pattern associated with a poleward moving auroral form in the cusp
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- K. Oksavik
- Department of Physics University of Oslo Oslo Norway
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- J. Moen
- Department of Physics University of Oslo Oslo Norway
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- H. C. Carlson
- Air Force Office of Scientific Research Arlington Virginia USA
書誌事項
- 公開日
- 2004-06
- 権利情報
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- http://onlinelibrary.wiley.com/termsAndConditions#vor
- DOI
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- 10.1029/2004gl019838
- 公開者
- American Geophysical Union (AGU)
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説明
<jats:p>In this paper we present high‐resolution observations by the EISCAT Svalbard Radar of the localized ionospheric flow response due to one single flux transfer event and the relative location of a poleward moving auroral form. In a fast scan mode the radar was tracking a 50–60 km wide channel of westward flow in the cusp region. This flow channel was surrounded by flow running in the opposite direction. At the poleward edge of the narrow flow channel a poleward moving auroral form was situated, consistent with the auroral form being the signature of an upward Birkeland current filament. Our observations can be interpreted in terms of the <jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#grl18257-bib-0018"><jats:italic>Southwood</jats:italic> [1985</jats:ext-link>, <jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#grl18257-bib-0019">1987]</jats:ext-link> flux transfer model, and the FTE twin‐cell flow pattern appears to be a ripple onto the larger‐scale background convection.</jats:p>
収録刊行物
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- Geophysical Research Letters
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Geophysical Research Letters 31 (11), L11807-, 2004-06
American Geophysical Union (AGU)
