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Proceedings Paper

Scales of variability in the southern ocean from satellite altimetry and FRAM (Fine Resolution Antarctic Model)
Author(s): Helen M. Snaith
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Paper Abstract

Satellite altimetry and numerical models offer two alternative methods of studying the circulation of the remote Southern Ocean at a range of space and time scales. Repeated tracks of satellite altimeter data, from GEOSAT and ERS-1, have been used to determine characteristic length scales of oceanic mesoscale features, and the time scales of this activity, in the Agulhas Region (24-65 degree(s)S 0-60 degree(s)E). The results will be shown and discussed in terms of the local ocean dynamics and the differences in sampling between the two satellites. The Fine Resolution Antarctic Model is a numerical model of the Southern Ocean, designed to resolve mesoscale features of the circulation. A six year time series of monthly model surface dynamic heights has been sampled as if by an altimeter. These `model altimeter' data have been processed using the same methods as for real altimeter data. The spatial scales of mesoscale activity in the model have been determined using the same techniques as for the real altimeter data and the results compared in order to determine the ability of the model to recreate the mesoscale activity of the region studied.

Paper Details

Date Published: 21 December 1994
PDF: 12 pages
Proc. SPIE 2319, Oceanic Remote Sensing and Sea Ice Monitoring, (21 December 1994); doi: 10.1117/12.197279
Show Author Affiliations
Helen M. Snaith, James Rennell Ctr. for Ocean Circulation (United Kingdom)


Published in SPIE Proceedings Vol. 2319:
Oceanic Remote Sensing and Sea Ice Monitoring
Johnny Andre Johannessen; Trevor H. Guymer, Editor(s)

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