論文

本文へのリンクあり
2020年8月16日

Daytime Dynamo Electrodynamics With Spiral Currents Driven by Strong Winds Revealed by Vapor Trails and Sounding Rocket Probes

Geophysical Research Letters
  • R. Pfaff
  • M. Larsen
  • T. Abe
  • H. Habu
  • J. Clemmons
  • H. Freudenreich
  • D. Rowland
  • T. Bullett
  • M. Y. Yamamoto
  • S. Watanabe
  • Y. Kakinami
  • T. Yokoyama
  • J. Mabie
  • J. Klenzing
  • R. Bishop
  • R. Walterscheid
  • M. Yamamoto
  • Y. Yamazaki
  • N. Murphy
  • V. Angelopoulos
  • 全て表示

47
15
記述言語
掲載種別
研究論文(学術雑誌)
DOI
10.1029/2020GL088803
出版者・発行元
American Geophysical Union (AGU)

We investigate the forces and atmosphere-ionosphere coupling that create atmospheric dynamo currents using two rockets launched nearly simultaneously on 4 July 2013 from Wallops Island (USA), during daytime Sq conditions with ΔH of −30 nT. One rocket released a vapor trail observed from an airplane which showed peak velocities of >160 m/s near 108 km and turbulence coincident with strong unstable shear. Electric and magnetic fields and plasma density were measured on a second rocket. The current density peaked near 110 km exhibiting a spiral pattern with altitude that mirrored that of the winds, suggesting the dynamo is driven by tidal forcing. Such stratified currents are obscured in integrated ground measurements. Large electric fields produced a current opposite to that driven by the wind, believed created to minimize the current divergence. Using the observations, we solve the dynamo equation versus altitude, providing a new perspective on the complex nature of the atmospheric dynamo.

リンク情報
DOI
https://doi.org/10.1029/2020GL088803
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85089393985&origin=inward 本文へのリンクあり
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85089393985&origin=inward
URL
https://onlinelibrary.wiley.com/doi/pdf/10.1029/2020GL088803
URL
https://onlinelibrary.wiley.com/doi/full-xml/10.1029/2020GL088803
ID情報
  • DOI : 10.1029/2020GL088803
  • ISSN : 0094-8276
  • eISSN : 1944-8007
  • SCOPUS ID : 85089393985

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