Ocean Tides Observed from A GPS Receiver on Floating Sea Ice Near Chinese Zhongshan Station, Antarctica

Due to limit of coverage in TOPEX/Poseidon (T/P) satellite and sparseness of in-situ tide gauges around Antarctica, the accuracy of global ocean tide models in Antarctic seas is relatively poorer than in low- and mid-latitude regions. To better understand ocean tides in Prydz Bay, east Antarctica, a...

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Bibliographic Details
Published inMarine geodesy Vol. 41; no. 4; pp. 353 - 367
Main Authors Lei, Jintao, Li, Fei, Zhang, Shengkai, Xiao, Chi, Xie, Surui, Ke, Hao, Zhang, Qingchuan, Li, Wenhao
Format Journal Article
LanguageEnglish
Published Philadelphia Taylor & Francis 04.07.2018
Taylor & Francis Ltd
Subjects
Accuracy
Bottom pressure
Constituents
Floating
Floating ice
Gauges
Global positioning systems
GPS
harmonic analysis
Internet
kinematic PPP
Kinematics
Major constituents
Model accuracy
Ocean models
Ocean tides
Oceans
Satellite navigation systems
Satellites
Sea ice
Solutions
Tidal constituents
Tide gauges
Tides
TOPEX
Prydz Bay
Antarctica
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Summary:Due to limit of coverage in TOPEX/Poseidon (T/P) satellite and sparseness of in-situ tide gauges around Antarctica, the accuracy of global ocean tide models in Antarctic seas is relatively poorer than in low- and mid-latitude regions. To better understand ocean tides in Prydz Bay, east Antarctica, a GPS receiver was deployed on floating sea ice to measure tide-induced ice motion in multiple campaigns. Four online Precise Point Positioning (PPP) services are used to process the GPS data in the kinematic PPP mode, and UTide software is used to separate the major tidal constituents. Comparison between results from different processing methods (relative processing solutions from Track, kinematic PPP solutions from online services) and with bottom pressure gauge (BPG) shows that, high-accuracy tidal information can be obtained from GPS observations on floating sea ice, the root-sum-square (RSS) for the eight major constituents (O1, K1, P1, Q1, M2, S2, N2, K2) is below 4 cm. We have also studied the impacts of data span and filter edge effects at daily boundaries on the accuracy of tide estimates, and found that to obtain reliable tide estimates and neglect the filter edge effects, continuous observation longer than 30 days is necessary. Our study suggests that GPS provides an independent method to estimate tides in Prydz Bay, and can be an alternative to tidal gauges, which are costly and hard to maintain in Antarctica.
ISSN:0149-0419
1521-060X
DOI:10.1080/01490419.2018.1454370