Abstract:

Methane data was collected using METS sensor to look at the seeps at the site. Water current (speed and direction) and temperature data was also collected to look at the point sources. Oxygen data was collected using optode sensors inside and out of a chimney to look at the total oxygen consumption (TOU) of the soil. Water current (speed and direction), temperature, turbidity, conductivity, pressure, data was also collected. Samples were collected in the northern Gulf of Mexico from August 31st to September 15th, 2015.

Suggested Citation:

Chris Martens, Howard Mendlovitz. 2018. GOM minilander Methane (CH4) and Oxygen (O2) data, northern Gulf of Mexico (MC26) Horn Dome, August 31, 2015 to September 15, 2015. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N7BK19T7

Purpose:

Using this data we can track methane plumes and looks at the effect of the surrounding community and water column. This data can also be used to target grab samples for further detailed analysis. The oxygen data was collected to calculate the TOU of the soil and other observational sensors were used to track parameters within the site.

Data Parameters and Units:

Date and Time for CH4 (GMT); Methane from seafloor (nM); Depth of lander on seafloor (m); Temperature from pressure sensor from seafloor (deg C); Date and time of O2 (GMT); Conductivity (0.3m off seafloor) [mS/cm]; Cap (0.3 m off seafloor) O2 concentration [uM]; Cap (0.3 m off seafloor) Temperature [deg C]; Opt1 (TOP senor inside tube): O2 concentration [uM]; Opt1 (Top sensor inside tube) : Temperature [deg C]; Opt2 (middle senor inside tube): O2 concentration [uM]; Opt2 (middle senor inside tube): Temperature [deg C]; Opt3 (bottom senor inside tube): O2 concentration [uM]; Opt3: (bottom senor inside tube): Temperature [deg C]; Salinity (0.3m off seafloor using Temp in top) (PSU)

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