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Stability of direct GPS estimates of ocean tide loading

journal contribution
posted on 2023-05-17, 15:14 authored by Allinson, CR, Clarke, PJ, Edwards, SJ, Matt KingMatt King, Baker, TF, Cruddace, PR
We observe ocean tide loading (OTL) at diurnal and semi-diurnal periods by directly estimating fixed-period harmonic motions within individual daily GPS analyses. Stacking of multiple solutions allows us to isolate the principal near-diurnal and near-semi-diurnal OTL components. Using data from UK sites where predicted OTL for the M 2 component varies from 3-46 mm in amplitude, we show that our estimates are stable for the principal OTL components when data from at least 90 days are stacked. Our final observations are compared to model predictions (using the FES95.2, FES99, GOT00.2, TPXO.2, TPXO.6, NAO.99b and CSR3 models) and are in agreement with OTL predicted by FES99, but differ significantly at some locations from those predicted by the CSR3 and TPXO.2 tidal models. Copyright 2004 by the American Geophysical Union.

History

Publication title

Geophysical Research Letters

Volume

31

Issue

15

Pagination

L15603 1-4

ISSN

0094-8276

Department/School

School of Geography, Planning and Spatial Sciences

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the earth sciences