Abstract:

Underway data collected aboard the R/V Pelican during the GISR G04 Mooring recovery cruise. Data includes shipboard ADCP data from 300Khz and 75Khz systems and the MIDAS SCS sampling system which collects meteorological and near surface oceanographic data and were collected 25-June-2014 to 2-July-2014.

Suggested Citation:

Steven DiMarco. 2016. Shipboard ADCP, underway near surface meteorology and hydrography, G06 cruise, Deepwater Horizon oil spill region, June 25 to July 2 2014. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N7Q23X9Z

Purpose:

Ancillary data was collected concurrently with current meter moorings data. Current meters were deployed to characterize the subregional currents and hydrography in the northern Gulf of Mexico.

Data Parameters and Units:

ADCP 75 kHz and ADCP 3000 kHz: ADCP_transmitter_frequency (kHz), scale_factor beam_angle (degrees), bin_length (meters), ADCP_angle_in_ship_axis (degrees), depth_bin1_middle (meters), num_ping_per_ensemble transducer_depth (meters), reference_time Date of reference julian day (YYYYMMDD hh:mm), Julian_day relative to reference time (Julian Day), date_time_UTC ASCII gregorian date and time UTC day (YYYYMMDD hh:mm), latitude (decimal degrees), longitude (decimal degrees), uvel_ship Eastward ship velocity (m/s), vvel_ship Northward ship velocity (m/s), depth (meters), temperature_ADCP ADCP transducer temperature (degrees Celsius), heading of ship (degrees), pitch of ship (degrees), roll of ship (degrees), u_bottom_track Bottom Track Eastward velocity (m/s), v_bottom_track Bottom Track Northward velocity (m/s), w_bottom_track Bottom Track Vertical velocity (m/s), bottom_range (meters), eastward_sea_water_velocity Eastward absolute ADCP current velocity (m/s), northward_sea_water_velocity Northward absolute ADCP current velocity (m/s), upward_sea_water_velocity Vertical absolute ADCP current velocity (m/s), sea_water_velocity_error absolute ADCP current velocity error (m/s), percentage_good_ADCP_4_beam_solution % of good data with 4 beams (percent), percentage_good_ADCP_3_beam_solution % of good data with 3 beams (percent), percentage_good_data_rejected_because_of_EW % of good data rejected because of EW (percent), percentage_good_ADCP_2_bad_beams % of data with 2 bad beams (percent), echo_intensity Mean echo Intensity (count), echo_intensity_beam1 Mean echo Intensity for beam 1 (count), echo_intensity_beam2 Mean echo Intensity for beam 2 (count), echo_intensity_beam3 Mean echo Intensity for beam 3 (count), echo_intensity_beam4 Mean echo Intensity for beam 4 (count), correlation for all beams (count), correlation_beam1 correlation for beam 1 (count), correlation_beam2 correlation for beam 2 (count), correlation_beam3 correlation for beam 3 (count), correlation_beam4 correlation for beam 4 (count), CAS_current_flag Flag on ADCP velocity (numeric), [0-9] ref_layer_Ilim Reference Layer Limit Index bathymetry along track (meters), SCS (Data are from the MIDAS system aboard the Pelican): column 0. TimeStamp (UTC), column 1. Trimble-Longitude West (decimal degrees), column 2. Trimble-Latitude North (decimal degrees), column 3. Temperature (degrees Celsius), column 4. Barometric-Pressure, (hPa), column 5. Fluorometer-micro-g-per-l-Value (micro-g/l), column 6. Transmissometer-%-Value (percent), column 7. Relative-Humidity (percent), column 8. TRUE-WIND-Direction (degrees), column 9. TRUE-WIND-Speed (Knots), column 10. Therm-Temperature (degrees Celsius), column 11. Therm-Salinity (PSU), column 12. Relative-WIND-Spd (Knots), column 13. Relative-WIND-Direction (degrees)

Methods:

Shipboard ADCP mounted on the R/V Pelican. Continuous flow through system and the Multiple Instrument Data Acquisition System (MIDAS)

Instruments:

RDI 300Khz and 75Khz ADCPs GPS, SeaBird SBE21 thermosalinograph, Turner Fluorometer, Wetlabs transmissometer, R.M. Young Metpackage

Error Analysis:

Data were visually inspected for errors.

Individual Files: