CTD bottle data collected near the Axial Seamount on the Juan de Fuca Ridge on R/V Thomas G. Thompson TN327 in August 2015.

<p>Axial Seamount 2015 Niskin Sample Data for TN327. In addition to standard CTD instrument measurements, water samples were analyzed on board for methane and hydrogen concentration by D. Butterfield and B. Larson using an SRI 8610C gas chromatograph with flame ionization detector for CH4 and pulsed discharge detector for H2 as described in (Larson et al., 2015). Due to time constraints, only selected samples were analyzed.</p>

<p>Methane and hydrogen results are reported in nmol/L. Methane and hydrogen results have been published in (Spietz et al., 2018).</p>

<p>The full CTD data for the cruise is available from the R2R site: <a href=\"http://www.rvdata.us/catalog/TN327\">http://www.rvdata.us/catalog/TN327</a></p>

<p>Metadata is also available through the cruise report on the PMEL web site:<br />
<a href=\"https://www.pmel.noaa.gov/eoi/axial/2015/Axial2015-Cruise-Report-with-logs-revised.pdf\" target=\"_blank\">https://www.pmel.noaa.gov/eoi/axial/2015/Axial2015-Cruise-Report-with-logs-revised.pdf</a></p>