Classical tidal harmonic analysis including error estimates in MATLAB using T_TIDE

  • Authors:

  • Rich Pawlowicz;Bob Beardsley;Steve Lentz

  • Affiliations:

  • Department of Earth and Ocean Sciences, University of British Columbia, 6270 University Blvd., Vancouver, BC, Canada V6T 1Z4;Woods Hole Oceanographic Institution, Woods Hole, MA;Woods Hole Oceanographic Institution, Woods Hole, MA

  • Venue:
  • Computers & Geosciences
  • Year:
  • 2002

Quantified Score

Hi-index 0.00

Visualization

Abstract

A standard part of any oceanic pressure gauge or current meter analysis is the separation of tidal from non-tidal components of the signal. The tidal signal can either be discarded, or its characteristics described in some fashion useful for further analysis. Although tidal signals can be removed by standard high or bandpass filtering techniques, their relatively deterministic character and large amplitude make special techniques more effective. In classical harmonic analysis, the tidal signal is modelled as the sum of a finite set of sinusoids at specific frequencies related to astronomical parameters. A set of programs has been written in MATLAB to (a) perform classical harmonic analysis for periods of about 1 year or shorter, (b) account for (some) unresolved constituents using nodal corrections, and (c) compute confidence intervals for the analyzed components.