Abstract:

High temporal resolution currents were measured in the northern Gulf of Mexico 10-12 April 2015 from a bottom-mounted upward looking Nortek Signature55 ADCP. This ADCP can operate concurrently as a 75KHz broadband and 55KHz narrow band ADCP. Three components of currents were in broadband mode at 1-second intervals with 5 meter vertical resolution and in narrowband mode at 6 second intervals with 16 meter vertical resolution. The broadband coverage ranged from the seabed to 500m above the seabed. The narrowband coverage ranged from the seabed to 1000m above the seabed. The nominal depth of the seabed at the mooring location was 1289m. The instrument was deployed in lease block GC600 during GISR cruise G08 from the E/V Nautilus on 10-April-2015 and recovered by the R/V Pelican on GISR Cruise G09 on 12-April-2015.

Suggested Citation:

Socolofsky, Scott A. 2017. High-temporal resolution current measurements from a bottom-mounted upward looking Nortek Signature55 ADCP, northern Gulf of Mexico, April 2015. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N7ST7N9C

Purpose:

These current measurements were made to supplement ROV surveys of gas seeps in lease block GC600.

Data Parameters and Units:

Three components of velocity (m/s), Temperature (Deg C), Pressure (dBar), Time (sec), Latitude (deg), Longitude (deg), Nominal depth (m), Average blanking distance (m), Average cell size (m), Average number of pings, Average time (days), Average error, Average ensemble count, Average number of beams, Average number of cells, Average beam to channel mapping, Average amplitude beam (dB), Average correlation beam (%), Average battery (volt), Average heading (deg), Average pitch (deg), Average roll (deg), Average soundspeed (m/s), Average transmit energy, Average magnetic flux (raw), Average acceleration (raw), Average nominal correlation

Instruments:

Nortek Signature55 ADCP dual mode 75KHz broadband and 55KHz narrow band.

Individual Files: