angeo-19-159-2001.pdf (372.64 kB)
ULF waves with drift resonance and drift-bounce resonance energy sources as observed in artificially-induced HF radar backscatter
journal contribution
posted on 2009-12-08, 16:24 authored by Tim K. Yeoman, D. M. WrightHF radar backscatter which has been artificially-induced by a high power RF facility such as the EISCAT heater at Tromsø has been demonstrated to provide ionospheric electric field data of unprecedented temporal resolution and accuracy. Here such data are used to investigate ULF wave processes observed by the CUTLASS HF radars. Within a short period of time during a single four hour experiment three distinct wave types are observed with differing periods, and latitudinal and longitudinal phase evolution. Combining information from the three waves allows them to be divided into those with a large-scale nature, driven externally to the magnetosphere, and those with small azimuthal scale lengths, driven by wave-particle interactions. Furthermore, the nature of the wave-particle interactions for two distinct small-scale waves is revealed, with one wave interpreted as being driven by a drift resonance process and the other by a drift-bounce resonance interaction. Both of these mechanisms with m ≈ -35 and proton energies of 35–45 keV appear to be viable wave energy sources in the postnoon sector.
History
Citation
Annales Geophysicae: Atmospheres Hydrospheres and Space Science, 2001, 19 (2), pp.159-170Published in
Annales Geophysicae: Atmospheres Hydrospheres and Space Scienceissn
0992-7689Copyright date
2001Available date
2009-12-08Publisher DOI
Publisher version
http://www.ann-geophys.net/19/159/2001/Notes
Available from the publisher website at http://www.ann-geophys.net/19/159/2001/angeo-19-159-2001.htmlLanguage
enAdministrator link
Usage metrics
Categories
No categories selectedKeywords
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC