Home > Research > Publications & Outputs > Characteristics of medium-scale travelling iono...

Associated organisational unit

Electronic data

  • Grocott2013a

    Rights statement: ©2013. American Geophysical Union

    Final published version, 1.04 MB, PDF document

    Available under license: None

Links

Text available via DOI:

View graph of relations

Characteristics of medium-scale travelling ionospheric disturbances observed near the Antarctic Peninsula by HF radar

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Published
  • A. Grocott
  • K. Hosokawa
  • T. Ishida
  • M. Lester
  • S. E. Milan
  • M. P. Freeman
  • N. Sato
  • A. S. Yukimatu
Close
<mark>Journal publication date</mark>09/2013
<mark>Journal</mark>Journal of Geophysical Research
Issue number9
Volume118
Number of pages12
Pages (from-to)5830–5841
Publication StatusPublished
<mark>Original language</mark>English

Abstract

We present a survey of medium-scale traveling ionospheric disturbances (MSTIDs) observed by a Super Dual Auroral Radar Network HF radar located in the Falkland Islands between May 2010 and April 2011. The radar has a field of view that overlooks the Antarctic Peninsula, a known hot spot of gravity wave activity. We present observations of radar ground-backscatter data, in which the signatures of MSTIDs are manifested as structured enhancements in echo power. Observed periods were in the range 30–80 min, corresponding to frequencies of 0.2–0.6 mHz. Wavelengths were generally in the range 200–800 km and phase speeds in the range 100–300 m s−1. These values are within the ranges typically associated with medium-scale gravity waves. We find a primary population of northward (equatorward) propagating MSTIDs, which demonstrate an association with enhanced solar wind-magnetosphere coupling and a smaller, westward propagating population, that could be associated with atmospheric gravity waves excited by winds over the Andean and Antarctic Peninsula mountains or by the high winds of the Antarctic Polar Vortex.

Bibliographic note

©2013. American Geophysical Union