Abstract:

This dataset results from laboratory studies independent of any field settings or conditions conducted for general theoretical and evaluative purposes. It contains all data acquired in the laboratory and published in Magen and co-authors paper entitled

Suggested Citation:

Jeff Chanton. 2019. Dataset For: "A simple headspace equilibration method for measuring dissolved methane". Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N7QN64QT

Publications:

Magen, C., Lapham, L. L., Pohlman, J. W., Marshall, K., Bosman, S., Casso, M., & Chanton, J. P. (2014). A simple headspace equilibration method for measuring dissolved methane. Limnol. Oceangr. Methods, 12, 637–650. doi:10.4319/lom.2014.12.637

Purpose:

To offer the community a standard approach for measuring methane at sea.

Data Parameters and Units:

Contamination_with_base: Concentration in methane (CH4) after addition of potassium hydroxide (KOH) or sodium hydroxide (NaOH), as pellets or as solution-Addition as pellets [NaOH (g), NaOH (mmol/l), CH4 (nM)], Addition as pellets [KOH (g), KOH (mmol/l), CH4 (nM)], Addition as pellets, combusted vials [KOH (g), KOH (mmol/l), CH4 (nM)], Addition as solute [KOH (L), KOH (mmol/l), CH4 (nM)]; Experiment_knownCH4AdditionToVials: #Extraction yield of methane-CH4 measured (nmol), Standard error (nmol), CH4 injected (nmol); ModelPartitionCH4: Volume ratio headspace/water (units), CH4 in headspace [1 atm, 1.5 atm, 2 atm] (ppm), % of CH4 in headspace [1 atm, 1.5 atm, 2 atm], CH4 in headspace [1 atm, 1.5 atm, 2 atm] (nmol); SamplePreservation: All values are partial pressures of CH4 (ppm) in the headspace gas, Samples [Arctic Shelf, Sargasso Sea, Freshwater, Gulf of Mexico]; TransportAirplaneTest: CH4 Partial Pressure of gas injected (units), Volume of gas injected (mL), Transport (Yes, No), Type of stopper (blue, black), CH4 headspace concentration after 1 week (nM), stdev; Volumetric Error: Col #1: Volumetric ratio headspace over water, Col #2: Volumetric error of -0.1 mL on the headspace (%), Col #3: Volumetric error of -0.5 mL on the headspace (%), Col #4: Volumetric error of -1.0 mL on the headspace (%), Col #5: Volumetric error of -0.1 mL on the water (%), Col #6: Volumetric error of -0.5 mL on the headspace (%), Col #7: Volumetric error of -1.0 mL on the headspace (%)

Individual Files: