Abstract:
A Slocum Glider was deployed in the eastern Gulf of Mexico off of Tampa Bay in July and August 2016. As the glider traverses its transit path, it makes measurements at various depths from ~2m to near the seafloor or up to 200m. While the glider is deployed at sea, it surfaces and communicates to an onshore control station at predetermined intervals. A decimated selection of vehicle and science measurement is transmitted during these surface transmissions, and the relevant data becomes available through a USF web site. After the glider’s recovery at the end of the deployment, the complete measurement suite is downloaded from the vehicle and processed, and also becomes available through the USF site as well as a national data archive. The measurements in this data set include conductivity, temperature, depth, chlorophyll and gelbstoff fluorescence, and dissolved O2. Other data sets for this deployment include acoustic tag telemetry receiver detections, passive acoustic recordings, and echosounder water column data.
The glider was deployed on May 16, 2017 at the 30m isobath. It traversed for a week to the NW before turning WSW to the 150m isobath, turned around and made its way bath NE before turning SE. It was recovered on June 12, 2017. The intent was for the glider to follow the progression of the Gulfstream Natural Gas Pipeline before and after a transect out to the shelf break with the intent of collecting water quality and acoustic data sets.
Suggested Citation:
Chad Lembke, David Mann, Susan Lowerre-Barbieri, Chris Taylor, Steven Murawski. Eastern Gulf of Mexico Glider Deployment M72 (05/16/2017 - 06/12/17) - Water Quality Variables. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/ehj8evgw
Purpose:
Demonstration of fisheries applicable data sets obtained by underwater gliders, including tag telemetry receivers, passive acoustic recordings, and echosounder derived water column acoustic backscatter.
Data Parameters and Units:
Commanded volume of buoyancy pumped (cc), Commanded position of the battery (in), Commanded heading (rad), Height above the bottom (m), Avg climbing rate (m/s), Avg. depth rate of change, where >0 is down (m/s), Avg. diving rate (m/s), Avg. speed (m/s), Measured volume of buoyancy pumped (cc), Battery (volts), Measured position of the battery (in), Glider depth (m), Rate of change of depth (m/s), Final Rate of change of depth (m/s), GPS Magnetic heading (rad), Latitude (lat), Longitude (lon), GPS Magnetic variation (rad), GPS speed over ground (m/s), Measured heading (rad), Latitude (lat), Longitude (lon), Mission Avg. speed climbing (m/s), Mission Avg. speed diving (m/s), Measured vehicle pitch (rad), Seconds since 1/1/1970 (timestamp), Measured vehicle roll (rad), Speed (m/s), Measured internal vacuum (inHg), Water depth (m_depth + m_altitude) (m), Water current components VX (m/s), Water current components VY (m/s), Backscattering-reference (nodim), Backscattering-calculated (nodim), Backscattering-counts (nodim), CDOM-reference (nodim), CDOM-calculated (ppb), CDOM-counts (nodim), Chlorophyll-reference (nodim), Chlorophyll-calculated (ug/l), Chlorophyll-counts (nodim), Fluorometer Temperature (nodim), Fluorometer Timestamp (timestamp), Seconds since 1/1/1970 (timestamp), Oxygen (nodim), Oxygen saturation (nodim), Oxygen Optode Temperature (nodim), Conductivity (s/m), Pressure (bar), Water Temperature (deg C)