Periodic motions in Weddell Sea pack ice

Rowe, M.A.; Sear, C.B.; Morrison, S.J.; Wadhams, P.; Limbert, D.W.S.; Crane, D.R.. 1989 Periodic motions in Weddell Sea pack ice. Annals of Glaciology, 12. 145-151. 10.3189/S0260305500007114

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Official URL: http://dx.doi.org/10.3189/S0260305500007114

Abstract/Summary

Position data from an Argos-tracked buoy deployed in the southern Weddell Sea in the austral summer of 1986 are analysed to determine important time-scales of variation of sea-ice motion in the seasonal sea-ice zone. Quality control and pre-processing of raw buoy data are discussed. Processed position data are subjected to time- and frequency-domain analyses. These highlight the importance of diurnal and semi-diurnal periodicities in the buoy motion. These preferred periodicities are associated with tidal forcing rather than wind forcing or inertial oscillations. Periodograms of the longitudinal component of buoy motion indicate that the power of the 24 h tidal component drops dramatically around day 130 in 1986. The possible causes of this are discussed and it is concluded that internal resistance within the sea-ice field may have increased at that time.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.3189/S0260305500007114
ISSN:	0260-3055
Date made live:	25 Oct 2018 08:23 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/521335

Item Type:

Publication - Article

Digital Object Identifier (DOI):

10.3189/S0260305500007114

ISSN:

0260-3055

Date made live:

25 Oct 2018 08:23 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/521335