Tidal observations on floating ice using a single GPS receiver

We measure ocean tides as experienced by sea ice or ice shelves using a single GPS receiver. Such a method allows for tidal measurements to be made with the same precision regardless of its distance from a GPS base station, since such a base station is not required. Single epoch observations are sho...

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Bibliographic Details
Published in:Geophysical Research Letters
Main Authors: King, MA, Aoki, S
Format: Article in Journal/Newspaper
Language:English
Published: Wiley-Blackwell 2003
Subjects:
Earth Sciences
Physical geography and environmental geoscience
Physical geography and environmental geoscience not elsewhere classified
Ice Shelves
Sea ice
Online Access:https://doi.org/10.1029/2002GL016182
http://ecite.utas.edu.au/81804
Description
Summary:We measure ocean tides as experienced by sea ice or ice shelves using a single GPS receiver. Such a method allows for tidal measurements to be made with the same precision regardless of its distance from a GPS base station, since such a base station is not required. Single epoch observations are shown to be accurate to about 50 mm when compared with concurrent Bottom Pressure Gauge (BPG) observations. The differences between the GPS and BPG observations are largely free from power at tidal frequencies. Furthermore, harmonic tidal analyses show that these GPS observations allow the correct determination of diurnal and semi-diurnal tidal constituents, meaning that observations of this type can be assimilated into numerical tide models.

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