Dataset: Bottle chemistry data from hydrothermal vents sampled by CTD rosette during R/V Atlantis cruise AT37-12 in April and May 2017

This dataset represents bottle chemistry (Nitrite, pH, alkalinity, and oxygen) data that were collected from discrete depths by CTD rosette during the AT37-12 cruise on R/V Atlantis in the southern part of the Eastern Tropical North Pacific (ETNP) in April–May 2017. Samples were acquired using a 24-bottle CTD rosette equipped with temperature, salinity, pressure, and oxygen sensors at 8 stations. We measured nitrite using the Griess method, Nitrate by chemiluminescence detection via vanadium reduction, pH by colorimetric determination, and Total Alkalinity by titration.

Nitrite was measured using an Ocean Optics QEPRO spectrophotometer with a 10-centimeter Starna flow-through quartz cell. Nitrate is reported as the difference from the total nitrogen oxides measured with a Teledyne T200 NOx analyzer with a custom front end for vanadium reduction and nitrite measurement. pH was measured using an Agilent 8454 spectrophotometer with a custom front end for automated syringe injection. Total Alkalinity was measured using a custom total alkalinity titrator built by the lab of Andrew Dickson at UCSD-Scripps Institute for Oceanography.

Further details in Cinay et al. 2022, Global Biogeochemical Cycles