Periodic Motions in Weddell Sea Pack Ice
Open Access
- 1 January 1989
- journal article
- research article
- Published by International Glaciological Society in Annals of Glaciology
- Vol. 12, 145-151
- https://doi.org/10.1017/s0260305500007114
Abstract
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.Keywords
This publication has 4 references indexed in Scilit:
- Basin-Scale Ice Motion and Deformation in the Weddell Sea During WinterAnnals of Glaciology, 1989
- Pack-Ice Motion in the Weddell Sea in Relation to Weather Systems and Determination of a Weddell Sea Sea-Ice BudgetAnnals of Glaciology, 1989
- A prescription for period analysis of unevenly sampled time seriesThe Astrophysical Journal, 1986
- Tidal currents in the central Weddel SeaDeep Sea Research, 1977