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| Titel |
SuperDARN convection and Sondrestrom plasma drift |
| VerfasserIn |
L. Xu, A. V. Koustov, J. Thayer, M. A. McCready |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 19, no. 7 ; Nr. 19, no. 7, S.749-759 |
| Datensatznummer |
250014286
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| Publikation (Nr.) |
 copernicus.org/angeo-19-749-2001.pdf |
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| Zusammenfassung |
Plasma convection
measurements by the Goose Bay and Stokkseyri SuperDARN radar pair and the
Sondrestrom incoherent scatter radar are compared in three different ways, by
looking at the line-of-sight (l-o-s) velocities, by comparing the SuperDARN
vectors and corresponding Sondrestrom l-o-s velocities and by comparing the end
products of the instruments, the convection maps. All three comparisons show
overall reasonable agreement of the convection measurements though the data
spread is significant and for some points a strong disagreement is obvious. The
convection map comparison shows a tendency for the SuperDARN velocities to be
often less than the Sondrestrom drifts for strong flows (velocities > 1000
m/s) and larger for weak flows (velocities < 500 m/s). On average, both
effects do not exceed 35%. Data indicate that inconsistencies between the two
data sets occur largely at times of fast temporal variations of the plasma
drift and for strongly irregular flow ac-cording to the SuperDARN convection
maps. These facts indicate that the observed discrepancies are in many cases a
result of the different spatial and temporal resolutions of the instruments.
Key words. Ionosphere (ionospheric
irregularities; plasma convection; polar ionosphere) |
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