Method for Extracting Tidal and Inertial Motion from ARGOS Ice Buoys Applied to the Barents Sea during CEAREX.

Abstract

A harmonic analysis of tidal and inertial action was applied to observations of position of ARGOS buoys deployed on drifting multiyear sea ice in the Eastern Arctic-Barents Sea during CEAREX (1988-89). An ARGOS positioning-data screening protocol was developed and constructed using a constrained least squares algorithm for separate estimation of tidal and inertial currents. The analysis provided estimates of individual tidal components at 15-day intervals along the sea ice buoy drift tracks. The technique shows a reasonable qualitative distinction in current components at nearby semi-diurnal frequencies. Estimates of errors due to sampling and collinearity are derived directly from model statistics. Estimates of velocity produced from the unequally time-based data are then used for interpolation to a regular time grid for spectral analysis. Computed velocities (up to 70 ca s-I for M2 tidal notion over Spitsbergen Bank southeast of Svalbard) are in close agreement with the regional tidal model of Gjevik, et al. (1990, 1993).

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1993
Accession Number
ADA328543

Entities

People

  • C. H. Pease
  • J. E. Overland
  • P. Turet
  • R. S. Pritchard

Organizations

  • National Oceanic and Atmospheric Administration

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Algorithms
  • Arctic Ocean
  • Barents Sea
  • Computer Programming
  • Databases
  • Deep Water
  • Doppler Effect
  • Equations
  • Harmonic Analysis
  • Information Science
  • Military Research
  • Oceans
  • Sea Ice
  • Shallow Water
  • Tidal Currents
  • Time Intervals
  • Wind Stress

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Polar and Arctic Studies
  • Regression Analysis.