Abstract:

Data were collected using instrument packages deployed on a deep see lander. The lander was deployed in an active hydrocarbon seepage field. Oxygen data were collected using optode sensors inside and out of a chimney to look at the total oxygen consumption (TOU) of the sediment. Water current (speed and direction) and temperature data were also collected to look at the point sources. Data were collected in the northern Gulf of Mexico from September 16th to October 7th, 2016.

Suggested Citation:

Chris Martens, Howard Mendlovitz. 2018. GOM minilander ADCP and O2 data, northern Gulf of Mexico (GC767), September 16 to October 7, 2016. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N7Z899WN

Purpose:

Using these data we can track methane plumes and looks at the effect of the surrounding community and water column. Data can also be used to target grab samples for further detailed analysis and calculate total oxygen consumption (TOU).

Data Parameters and Units:

ADCP on Mini-Lander 1: First deployment at GC767 "4 beam, 600 khz unit"; Number of bins (cells) - 30 Size of bins (cells) - 2 meters Overlap of bins (cells) - 20% Bin 1 starts at 2 m Date; Lander Heading [Degrees]; Std Dev Heading [Degrees]; Pitch [Degrees]; Roll [Degrees]; Abs Tilt [Degrees]; Max Tilt [Degrees]; Std Dev Tilt [Degrees]; Tilt Direction [Degrees]; Charge Voltage Vtx1 [Volts]; Charge Voltage Vtx2 [Volts]; Min Input Voltage [Volts]; Input Voltage [Volts]; Input Current [mili amps]; Memory Used [Bytes]; Noise Peak Level B1 [dB]; Noise Peak Level B2 [dB]; Noise Peak Level B3 [dB]; Noise Peak Level B4 [dB]; Record Status; Ping Count; Cell Index [bins1-30]; Cell Status [bins1-30]; Horizontal Speed [cm/s -bins1-30]; Direction [Degrees -bins1-30]; North Speed [cm/s -bins1-30]; East Speed [cm/s -bins1-30]; Vertical Speed [cm/s -bins1-30]; SP Stdev Horizontal [cm/s -bins1-30]; SP Stdev AutoBeam [cm/s -bins1-30]; Strength [dB -bins1-30]; North AutoBeam [cm/s -bins1-30]; East AutoBeam [cm/s -bins1-30]; Vertical AutoBeam [cm/s -bins1-30]; Beam1 Speed [cm/s -bins1-30]; Beam2 Speed [cm/s -bins1-30]; Beam3 Speed [cm/s -bins1-30]; Beam4 Speed [cm/s -bins1-30]; Beam1 Strength [dB -bins1-30]; Beam2 Strength [dB -bins1-30]; Beam3 Strength [dB -bins1-30]; Beam4 Strength [dB -bins1-30]; Beam1 Stdev [cm/s -bins1-30]; Beam2 Stdev [cm/s -bins1-30]; Beam3 Stdev [cm/s -bins1-30]; Beam4 Stdev [cm/s -bins1-30]; Cross Difference [cm/s -bins1-30]; Beam1 Correlation Factor [cm/s -bins1-30]; Beam2 Correlation Factor [cm/s -bins1-30]; Beam3 Correlation Factor [cm/s -bins1-30]; Beam4 Correlation Factor [cm/s -bins1-30] O2 on Mini-Lander1: Date (GMT); Time (GMT); O2 from the cap 0.3 m from the seafloor (uM or % sat); Temp from O2 sensor from the cap 0.3 m from the seafloor (deg C); O2 concentration bottom sensor inside tube (uM or % sat); Temperature bottom sensor inside tube (deg C); O2 concentration middle sensor inside tube (uM or % sat); Temperature middle sensor inside tube (deg C); O2 concentration top sensor inside tube (uM or % sat); Temperature top sensor inside tube (deg C); O2 concentration 10 m off the seafloor sensor (uM or % sat); Temperature 10 m off the seafloor sensor (deg C)

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