ABSTRACT SATELLITE GPS MEASUREMENTS OF LANDFAST ICE DISPLACEMENTS IN THE CANADIAN BEAUFORT DURING THE
Three GPS (Global Positioning System) beacons were placed on the landfast ice cover of the Southeastern Beaufort Sea in mid-February, 2003. Changes in the positions of these beacons, roughly 35 km offshore of Richards Island and the Tuktoyaktuk Peninsula, were deduced from data relayed through the S...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.69.4043 http://www.aslenv.com/reports/ocean/GPS-POAC05.pdf |
| Summary: | Three GPS (Global Positioning System) beacons were placed on the landfast ice cover of the Southeastern Beaufort Sea in mid-February, 2003. Changes in the positions of these beacons, roughly 35 km offshore of Richards Island and the Tuktoyaktuk Peninsula, were deduced from data relayed through the System Argos satellite network.This data acquisition program was carried out for Devon Canada for input to a planned drilling program. Position data with sufficient continuity from two of the three beacons were used to document landfast ice movements at both the western and eastern ends of the area of interest. Consistent, but less detailed data, were acquired at the third, central, beacon site. The results showed capabilities forresolving movements with as small as 2m in both the north-south and east-west directions on time scales of 6 to 12 hours. All detected movements were limited to a period in March and involved a single primarily southward, ice displacement event, approximately 10 m in magnitude. Smaller (2-5m) eastward components of this displacement dissipated over a, roughly, week-long period immediately following the event. Satellite imagery and ice velocity data from mobile, more offshore, pack ice, allowed identification of the causal source of the displacements. |
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