کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1777474 | 1523665 | 2010 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Simultaneous observations of small multi-scale structures in an auroral arc
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فیزیک زمین (ژئو فیزیک)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Simultaneous observations of small multi-scale structures in an auroral arc Simultaneous observations of small multi-scale structures in an auroral arc](/preview/png/1777474.png)
چکیده انگلیسی
Auroral arcs can develop small-scale distortions known as vortex streets or curls. Other common and somewhat larger spatially periodic distortions are auroral folds. In this event study we present simultaneous wide and narrow field imager observations of a third kind of structuring, on even smaller spatial scales. Boundary undulations, or “ruffs”, have been observed to form on the edge of an auroral arc and they occur superimposed on curls, folds or at times of auroral shear. The undulations typically have wavelengths of less than 3Â km and amplitudes of less than 800Â m. They are observed to move on the edge of the arc, with velocities of about 11Â km/s. These observations, with multi-scale deformations, reveal a much more intricate structuring of auroral arcs than previously found.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Atmospheric and Solar-Terrestrial Physics - Volume 72, Issues 7â8, May 2010, Pages 633-637
Journal: Journal of Atmospheric and Solar-Terrestrial Physics - Volume 72, Issues 7â8, May 2010, Pages 633-637
نویسندگان
H. Dahlgren, A. Aikio, K. Kaila, N. Ivchenko, B.S. Lanchester, D.K. Whiter, G.T. Marklund,