©2020 Biological and Chemical Oceanography Data Management Office.This dataset includes nitrite (NO2-) isotopes and concentration measurements with accompanying physiochemical data from the 2013 U.S. GEOTRACES East Pacific Zonal Transect cruise (GP16). The cruise sailed from October 25, 2013 to December 18, 2023 aboard the R/V Thompson.
Seawater samples were collected at sea from Niskin bottles and were immediately analyzed for nitrite concentration. If sufficient nitrite concentrations (>0.1 micromoles per liter (umol/L)) were observed, samples were preserved as nitrous oxide (N2O) using sodium azide and acetic acid to selectively convert nitrite to nitrous oxide (McIlvin and Altabet, 2005). In the laboratory, the resultant N2O was analyzed using a custom purge and trap gas bench connected to an isotope ratio mass spectrometer. Nitrite isotope standards RSIL-N23, -N7373, and -N10219 were analyzed alongside the seawater samples to normalize nitrite d15N and d18O values to reference scales (Casciotti et al. 2007).
Casciotti, K. L., Gluschankoff, N. (2024) Nitrite (NO2-) isotopes and concentrations from the U.S. GEOTRACES EPZT cruise (GP16, TN303) on R/V Thomas G. Thompson in the tropical Pacific from October to December 2013. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2024-07-30 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.933707.1 [access date]
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