Title :
Analysis of long time series of ADCP backscatter data in the Ligurian Sea to investigate the zooplankton variability
Author :
Schiano, Elisabetta ; Pensieri, Sara ; Bozzano, Roberto ; Picco, Paola
Author_Institution :
Nat. Res. Council, Genoa, Italy
Abstract :
Three years of 300 kHz Acoustic Current Doppler Profiler ancillary data collected in the Central Ligurian Sea are analyzed to investigate the zooplankton diel vertical migration in the upper thermocline. After a pre-processing aimed at avoiding the slant range attenuation, hourly volume backscattering strength time series were obtained. Despite the lack of concurrent net samples collection, different migration patterns were identified and their seasonal variability examined by means of time-frequency analysis. Relationships with environmental conditions and lunar phase were also evidenced.
Keywords :
Doppler measurement; backscatter; microorganisms; oceanographic equipment; oceanographic techniques; temperature distribution; time series; time-frequency analysis; underwater acoustic propagation; ADCP backscatter data; Ligurian Sea; acoustic current doppler profiler ancillary data; environmental conditions; frequency 300 kHz; long time series analysis; lunar phase; migration patterns; slant range attenuation avoidance; time-frequency analysis; upper thermocline; volume backscattering strength time series; zooplankton diel vertical migration; zooplankton variability; Acoustics; Backscatter; Equations; Instruments; Ocean temperature; Sea measurements; Sea surface; Acoustic Doppler Current Profiler; Ligurian Sea; zooplankton diel vertical migration;
Conference_Titel :
OCEANS - Bergen, 2013 MTS/IEEE
Conference_Location :
Bergen
Print_ISBN :
978-1-4799-0000-8
DOI :
10.1109/OCEANS-Bergen.2013.6608040
