Concentrations and radiocarbon signatures of SPE-DOC extracted from seawater samples on GO-SHIP cruises P16N, P18, and IO7N in the North Pacific, Eastern Pacific, and Western Indian Oceans from 2015-04-10 to 2018-06-06 (NCEI Accession 0278008)

This dataset contains chemical data collected on NOAA Ship Ronald H. Brown during cruises RB1503_leg1, RB1503_leg2, RB1606_leg1, RB1606_leg2, and RB1803 in the Arabian Sea, Indian Ocean, North Pacific Ocean, South Pacific Ocean, and Southern Ocean from 2015-04-10 to 2018-06-06. These data include dissolved organic Carbon. The instruments used to collect these data include Accelerator Mass Spectrometer and Niskin bottle. These data were collected by Ellen R.M. Druffel of University of California-Irvine as part of the "Cycling of Dissolved Organic Matter in the Pacific and Indian Oceans Using Radiocarbon (DOC 14C and 13C)" project. The Biological and Chemical Oceanography Data Management Office (BCO-DMO) submitted these data to NCEI on 2022-01-19.

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

GO-SHIP SPE-DOC

Dataset Description:
Acquisition Description:
Seawater was sampled from Niskin bottles on GO-SHIP P16N, P18, and IO7N cruises using acid-cleaned silicone tubing (soaked in 10% HCl). Seawater from depths shallower than 200m was filtered using pre-combusted Whatman GF/F 0.7 micrometer (µm) filters. Solid-phase extracted dissolved organic carbon (SPE-DOC) was extracted using Bond Elut PPL 1 gram resins and established protocols (Dittmar et al., 2008). On P18 and IO7N, SPE-DOC was extracted on the vessel. Seawater from P16N was stored frozen until processing at the laboratory at University of California, Irvine (UCI).

SPE-DOC elutions in methanol follow established protocols (Dittmar et al., 2008), that have been slightly adapted to increase carbon yields (Lewis et al., 2020). After elution, SPE-DOC was dried using a centrifugal evaporator, sealed on a vacuum line, and combusted at 850C for 2 hours. SPE-DOC concentrations were measured manometrically on a vacuum line, and radiocarbon measurements were performed at the Keck Carbon Cycle Accelerator Mass Spectrometry Lab at the University of California, Irvine.

Refer to "Related Datasets" for the related Niskin bottle data from these GO-SHIP cruises. Seawater from multiple Niskin bottles was integrated for solid-phase extraction. The stations and depth ranges listed (between the minimum and maximum depths) refer to the Niskin bottles from the GO-SHIP bottle file in related datasets.