The effect of bimodal sea spectra on HF radar wind analysis

Author

Heron, M.L.

Author_Institution

Marine Geophys. Lab., James Cook Univ., Townsville, Qld.

Volume

1

fYear

2004

fDate

9-12 Nov. 2004

Firstpage

537

Lastpage

541

Abstract

HF radar spectra have been shown to be able to produce wind direction information from the first-order peaks. The main error in this analysis is the spreading function which one adopts for the directional wave spectrum. There is increasing evidence in recent literature that the directional spectrum for gravity waves above the peak is bimodal in form. The bimodal shape has been recently modified to merge with the observations of omnidirectionality at wavelengths around 1.0 - 0.3 m. The analysis of HF radar data for wind direction determination is discussed in terms of the modified bimodal form for the wind wave spectrum

Keywords

gravity waves; ocean waves; radar detection; wave analysers; wind; 1 to 0.3 m; HF radar wind analysis; High Frequency radar spectra; bimodal sea spectra effect; directional wave spectrum; first-order peak; gravity wave; modified bimodal form; omnidirectional observation wavelength; wind direction determination; wind wave spectrum; Doppler radar; Doppler shift; Gravity; Hafnium; Laboratories; Propagation delay; Radar scattering; Sea surface; Surface waves; Wind speed;

fLanguage

English

Publisher

ieee

Conference_Titel

OCEANS '04. MTTS/IEEE TECHNO-OCEAN '04

Conference_Location

Kobe

Print_ISBN

0-7803-8669-8

Type

conf

DOI

10.1109/OCEANS.2004.1402972

Filename

1402972