Compound auroral micromorphology: Ground-based high-speed imaging

• 海老原, 祐輔

• Fukuda, Yoko

• Miyoshi, Yoshizumi

• Miyahara, Hiroko

• Itoya, Satoru

• Ebihara, Yusuke

• Hampton, Donald

• Dahlgren, Hanna

• Whiter, Daniel

• Ivchenko, Nickolay

抄録

Auroral microphysics still remains partly unexplored. Cutting-edge ground-based optical observations using scientific complementary metal-oxide semiconductor (sCMOS) cameras recently enabled us to observe the fine-scale morphology of bright aurora at magnetic zenith for a variety of rapidly varying features for long uninterrupted periods. We report two interesting examples of combinations of fine-scale rapidly varying auroral features as observed by the sCMOS cameras installed at Poker Flat Research Range (PFRR), Alaska, in February 2014. The first example shows that flickering rays and pulsating modulation simultaneously appeared at the middle of a surge in the pre-midnight sector. The second example shows localized flickering aurora associated with growing eddies at the poleward edge of an arc in the midnight sector.

収録刊行物

• Earth, Planets and Space

  Earth, Planets and Space 67 2015-02-15

  SpringerOpen

キーワード

• Aurora
• Magnetosphere-ionosphere coupling
• Wave-particle interaction

詳細情報

• CRID: 1050282810809478912
• NII論文ID: 120005756318
• ISSN: 18805981
• HANDLE: 2433/212425
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles