| EK60 Water Column Sonar Data Collected During SE0803 |
| Oceanographic Survey of Cross Seamount and Control Sites (SE0803, EK60). The goals
of the cruise were to collect acoustic backscatter and oceanographic data at Cross
Seamount (18°43.285? N, longitude 158° 15.710? W) and at control sites in the surrounding
environment. Data collected consisted of CTD casts, trawl samples, and continuous
monitoring of currents and biological acoustic backscatter. CTD cats were conducted
at predetermined stations. CTDs were equipped with oxygen sensors and fluorometers.
Trawl operations were conducted at predetermined stations using a Cobb trawl at depths
of the shallow (nighttime) and deep (day and nighttime) sound scattering layers. Currents
were continuously monitored using an RD Instruments Acoustic Doppler Current Profiler
(ADCP) operating at 75 kHz frequency. Biological backscatter were recorded along predetermined
transects using the EK60 echosounder system at 38, 70, and 120 kHz frequencies. |
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