©2020 Biological and Chemical Oceanography Data Management Office.The Eastern Tropical North Pacific (ETNP), like the other marine oxygen deficient zones (ODZs), is characterized by an anoxic water column, nitrite accumulation at the anoxic core, and fixed nitrogen loss via nitrite reduction to N2O and N2 gases. Here, we constrain the relative contribution of biogeochemical processes to observable features such as the secondary nitrite maximum (SNM) and local pH maximum by simultaneous measurement of inorganic nitrogen and carbon species. Bottle chemistry data...
Show moreThis 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
Babbin, A. R., Woosley, R., Cinay, T. (2023) Bottle chemistry data from hydrothermal vents sampled by CTD rosette during R/V Atlantis cruise AT37-12 in April and May 2017. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2023-02-13 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.889539.1 [access date]
Terms of Use
This dataset is licensed under Creative Commons Attribution 4.0.
If you wish to use this dataset, it is highly recommended that you contact the original principal investigators (PI). Should the relevant PI be unavailable, please contact BCO-DMO (info@bco-dmo.org) for additional guidance. For general guidance please see the BCO-DMO Terms of Use document.