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The Mysterious Green Streaks Below STEVE

التفاصيل البيبلوغرافية
العنوان: The Mysterious Green Streaks Below STEVE
المؤلفون: Joshua Semeter, Michael Hunnekuhl, Elizabeth MacDonald, Michael Hirsch, Neil Zeller, Alexei Chernenkoff, Jun Wang
المصدر: AGU Advances, Vol 1, Iss 4, Pp n/a-n/a (2020)
بيانات النشر: Wiley, 2020.
سنة النشر: 2020
المجموعة: LCC:Geology
LCC:Geophysics. Cosmic physics
مصطلحات موضوعية: STEVE, aurora, ionosphere, turbulence, citizen science, airglow, Geology, QE1-996.5, Geophysics. Cosmic physics, QC801-809
الوصف: Strong thermal emission velocity enhancement (STEVE) is an optical phenomenon of the subauroral ionosphere arising from extreme ion drift speeds. STEVE consists of two distinct components in true‐color imagery: a mauve or whitish arc extended in the magnetic east–west direction and a region of green emission adjacent to the arc, often structured into quasiperiodic columns aligned with the geomagnetic field (the “picket fence”). This work employs high‐resolution imagery by citizen scientists in a critical examination of fine‐scale features within the green emission region. Of particular interest are narrow “streaks” of emission forming underneath field‐aligned picket fence elements in the 100‐ to 110‐km altitude range. The streaks propagate in curved trajectories with dominant direction toward STEVE from the poleward side. The elongation is along the direction of motion, suggesting a drifting point‐like excitation source, with the apparent elongation due to a combination of motion blur and radiative lifetime effects. The cross‐sectional dimension is
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 2576-604X
Relation: https://doaj.org/toc/2576-604X
DOI: 10.1029/2020AV000183
URL الوصول: https://doaj.org/article/f3f77f17aff048c99fb573c0e8526e86
رقم الانضمام: edsdoj.f3f77f17aff048c99fb573c0e8526e86
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:2576604X
DOI:10.1029/2020AV000183