Comparison between HF radar current data and moored ADCP currentmeter

Cosoli, S. and Gačić, M. and Mazzoldi, A. (2005) Comparison between HF radar current data and moored ADCP currentmeter. Il nuovo cimento C, 28 (6). pp. 865-879. ISSN 1826-9885

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A preliminary assessment of accuracy of a two-sites shore-based HF Radar network along the Venice Lagoon littoral was attempted by means of comparison with a 57.5 day-long ADCP current time series for the period September- October 2002. Results showed that radar measurements were accurate (< 7 cm/s) in more than 50% of the times, since more than 50% of the differences between both E-W (U)and N-S (V )comp onents were under 7 cm/s, and more than 50% of direction differences were under 35◦. The main differences between the HF radar and surface ADCP currents can be explained in terms of random errors affecting the measurement technique and the daily sea breeze forcing, since low-pass filtering of current time series significantly improved the correlation and decreased the RMS of the differences between the two measured data set. Comparison of the semidiurnal (M2, S2)tidal band suggested good agreement between tidal ellipse amplitudes. Wind forcing on a daily time-scale (sea-breeze)w as associated with larger differences between radar and ADCP currents at a diurnal band due to the presence of a vertical shear in the surface layer.

Item Type: Article
Uncontrolled Keywords: Winds and their effects ; Coastal and estuarine oceanography ; Time series analysis, time variability
Subjects: 500 Scienze naturali e Matematica > 550 Scienze della Terra > 551 Geologia, Idrologia, Meteorologia
Depositing User: Marina Spanti
Date Deposited: 18 Mar 2020 15:42
Last Modified: 18 Mar 2020 15:42

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