 |
| Titel |
Characteristics of the Taylor microscale in the solar wind/foreshock: magnetic field and electron velocity measurements |
| VerfasserIn |
C. Gurgiolo, M. L. Goldstein, W. H. Matthaeus, A. Viñas, A. N. Fazakerley |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
0992-7689
|
| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 31, no. 11 ; Nr. 31, no. 11 (2013-11-22), S.2063-2075 |
| Datensatznummer |
250086151
|
| Publikation (Nr.) |
 copernicus.org/angeo-31-2063-2013.pdf |
|
|
|
|
|
| Zusammenfassung |
| The Taylor microscale is one of the fundamental turbulence scales.
Not easily estimated in the interplanetary medium employing single
spacecraft data, it has generally been studied through two point correlations.
In this paper we present an alternative, albeit mathematically equivalent,
method for estimating the Taylor microscale (λT).
We make two independent determinations employing multi-spacecraft
data sets from the Cluster mission, one using magnetic field data
and a second using electron velocity data. Our results using the magnetic
field data set yields a scale length of 1538 ± 550 km,
slightly less than, but within the same range as, values found in previous
magnetic-field-based studies. During time periods where both magnetic
field and electron velocity data can be used, the two values can be
compared. Relative comparisons show λT computed
from the velocity is often significantly smaller than that from the
magnetic field data. Due to a lack of events where both measurements
are available, the absolute λT based on the electron
fluid velocity is not able to be determined. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|