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Marine and Freshwater Research Marine and Freshwater Research Society
Advances in the aquatic sciences
RESEARCH ARTICLE

Parameters of the air-sea interface by high-frequency ground-wave Doppler radar

ML Heron, PE Dexter and BT McGann

Australian Journal of Marine and Freshwater Research 36(5) 655 - 670
Published: 1985

Abstract

A 30-MHz ground-wave ocean surface radar has been deployed inside the Great Barrier Reef where the water is sheltered from ocean swell. The spatial resolution of the radar is 3 km radially and 3.5º in azimuth. In each cell a 102.4-s time series is used to determine radial surface currents, wind directions, root- mean-square wave heights and wind speeds. Coincident observations of sea-wave spectra, surface currents and boundary-layer winds are used to evaluate the radar performance and to modify some of the methods of data analysis to suit these conditions. Surface current values are observed by the radar to an accuracy of ±0.05 m s-1, wind directions to ±10º , root-mean-square wave heights to 0.15 m and wind speeds to ±3 m s-1. In some spectra, the peak in the second-order continuum caused by the non-directional sea- wave spectrum is not resolved from a second-order resonance line. This disallows the derivation of the period of the dominant sea wave on a routine basis.

https://doi.org/10.1071/MF9850655

© CSIRO 1985

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