Wavelet analysis of surface current vector fields measured by high frequency Doppler radar

Research output: Chapter in Book/Report/Conference proceedingChapter

2 Citations (Scopus)

Abstract

Fourier spectral methods have been widely applied to coastal zone current measurements. However in cases such as riverine tides or estuarine outflow currents exhibit non-stationary characteristics which invalidate the basic assumptions of these methods. Wavelet analysis techniques can be used to determine the temporal evolution of current variance over a range of frequency scales and therefore can provide an improved understanding of event-driven dynamics. Morlet continuous-wavelet transforms were applied to multiple vector time-series measurements from a High Frequency (HF) Doppler radar and moored ADCPs near the mouth of Chesapeake Bay in 1996 and 1997 as well as wind measurements at the Chesapeake Light tower. The time-varying clockwise (CW) and counter-clockwise (CCW) wavelet spectra were computed from each vector time-series. The horizontal, vertical and temporal evolution of high energy scales could then be visualized. Significant short-term intensifications of 30-60 hour CW energy in the region of the outfall plume were observed that were highly coherent with local wind forcing.

Original languageEnglish (US)
Title of host publicationProceedings of the IEEE Working Conference on Current Measurement
PublisherIEEE
Pages19-24
Number of pages6
StatePublished - 1999
EventProceedings of the 1999 IEEE 6th Working Conference on Current Measurement - San Diego, CA, USA
Duration: Mar 11 1999Mar 13 1999

Other

OtherProceedings of the 1999 IEEE 6th Working Conference on Current Measurement
CitySan Diego, CA, USA
Period3/11/993/13/99

Fingerprint

Doppler radar
vector currents
Wavelet analysis
wavelet analysis
Time series
Outfalls
Tides
Electric current measurement
Chesapeake Bay (US)
Wavelet transforms
Towers
Coastal zones
wind measurement
mouth
spectral methods
towers
tides
plumes
counters
energy

ASJC Scopus subject areas

  • Instrumentation

Cite this

Haus, B. K., Graber, H. C., & Shay, L. K. (1999). Wavelet analysis of surface current vector fields measured by high frequency Doppler radar. In Proceedings of the IEEE Working Conference on Current Measurement (pp. 19-24). IEEE.

Wavelet analysis of surface current vector fields measured by high frequency Doppler radar. / Haus, Brian K; Graber, Hans C; Shay, Lynn K.

Proceedings of the IEEE Working Conference on Current Measurement. IEEE, 1999. p. 19-24.

Research output: Chapter in Book/Report/Conference proceedingChapter

Haus, BK, Graber, HC & Shay, LK 1999, Wavelet analysis of surface current vector fields measured by high frequency Doppler radar. in Proceedings of the IEEE Working Conference on Current Measurement. IEEE, pp. 19-24, Proceedings of the 1999 IEEE 6th Working Conference on Current Measurement, San Diego, CA, USA, 3/11/99.
Haus BK, Graber HC, Shay LK. Wavelet analysis of surface current vector fields measured by high frequency Doppler radar. In Proceedings of the IEEE Working Conference on Current Measurement. IEEE. 1999. p. 19-24
Haus, Brian K ; Graber, Hans C ; Shay, Lynn K. / Wavelet analysis of surface current vector fields measured by high frequency Doppler radar. Proceedings of the IEEE Working Conference on Current Measurement. IEEE, 1999. pp. 19-24
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