Title
Discrete cloud activity in Saturn's equator during 1995, 1996 and 1997
Date Issued
01 January 1999
Access level
metadata only access
Resource Type
review
Author(s)
Bureau des Longitudes
Publisher(s)
Elsevier Ltd
Abstract
A regular extensive CCD imaging of Saturn allowed us to analyze the discrete cloud activity in the Equatorial Zone from 1995 to 1997. The large-scale storm observed in 1994 at +10° (Sanchez-Lavega et al., 1996) was rediscovered in 1995, reaching a lifetime >1 year. Its slow motion characterized by a zonal velocity difference of -150 ms-1 relative to background flow is confirmed. Our red and near infrared observations showed a strong increase of white cloud activity in the southern Equatorial Zone (latitude -13.5°) during 1996, declining later on during 1997. Cloud tracking of two prominent plumes and other features allowed us to measure zonal wind velocities and to compare them to the Voyager zonal flow velocity profile. We note that in general the 1995-1997 features have velocities lower than those measured with the Voyagers. Altitude differences in the clouds and hence different zonal velocities, or real changes in the zonal jet as a consequence of Saturn's insolation cycle and ring-shadowing, can be the reason for such differences. © 1999 Elsevier Science Ltd. All rights reserved.
Start page
1277
End page
1283
Volume
47
Issue
November 10
Language
English
OCDE Knowledge area
Física de partículas, Campos de la Física
Astronomía
Subjects
Scopus EID
2-s2.0-11544288988
Source
Planetary and Space Science
ISSN of the container
00320633
Sources of information:
Directorio de Producción Científica
Scopus