N2O concentrations from San Pedro Ocean Time-series (SPOT) measured between 2014 to 2016 (NCEI Accession 0278724)

This dataset contains chemical data collected on R/V Yellowfin during cruise N-SPOT_Yellowfin_Cruises from 2014-09-10 to 2016-08-10. These data include Nitrous Oxide and depth. The instruments used to collect these data include CTD Sea-Bird 9, Fluorometer, GO-FLO Bottle, Gas Chromatograph, Niskin bottle, and Secchi Disc. These data were collected by Alyson Santoro of University of California-Santa Barbara and Douglas G. Capone of University of Southern California as part of the "Collaborative Research: New Approaches to New Production (N-SPOT)" project. The Biological and Chemical Oceanography Data Management Office (BCO-DMO) submitted these data to NCEI on 2020-08-20.

The following is the text of the dataset description provided by BCO-DMO:

N2O concentrations from San Pedro Ocean Time-series (SPOT) measured between 2014 to 2016

Dataset Description:
Acquisition Description:
From 2014 to 2015, water samples were collected using a 12 x 12 L Niskin bottle rosette equipped with a conductivity, temperature, and density (CTD) instrument package (SBE 9plus, Sea-Bird Electronics, Bellevue, Washington, USA), including dissolved oxygen (SBE 43) and photosynthetically available radiation (PAR, LI-COR, Biospherical Instruments Inc., San Diego, California, USA) sensors. Due to CTD failure, samples collected in 2015 and 2016 were collected primarily using manually triggered Go-Flo bottles and depths were chosen primarily using a profiling natural fluorometer (PNF) system as well as secchi disk.

N₂O concentrations were measured using a headspace equilibration method and analyzed on a SRI Greenhouse Gas Monitoring Gas Chromatograph (GC) equipped with an electron capture detector (ECD), dual HayeSep D packed columns, and a 1-mL sample loop (SRI Instruments, Torrance, California, USA; Elkins 1980; Laperriere et al. 2019). N₂O concentrations were calculated according to Walter et al. (2006).