Dataset: 1H NMR spectra of whole porewater DOM in California margin sediments from 2020 (Sikuliaq)

Name: 1H NMR spectra of whole porewater DOM in California margin sediments from 2020 (Sikuliaq)
Published: 2025-06-09
Keywords: DOC, DOM, sediment, porewater, NMR, oceans

This dataset has not been validatedData not availableVersion 1 (2025-06-09)Dataset Type:Unknown

Principal Investigator, Contact: Tomoko Komada (San Francisco State University)

Co-Principal Investigator: Hussain Abdulla (Texas A&M, Corpus Christi)

Co-Principal Investigator: David J. Burdige (Old Dominion University)

BCO-DMO Data Manager: Karen Soenen (Woods Hole Oceanographic Institution)

Project: Collaborative Research: Peptide Deamination as a Source of Refractory Dissolved Organic Matter in Marine Sediments (Peptide Deamination)

Abstract

1H NMR spectra of whole dissolved organic matter (DOM) samples are reported for StaD and StaK, located in the upper slope offshore central California. Sediment and porewater sampling were done in Dec 2020 onboard the R/V Sikuliaq. Sediment samples were retrieved using multi-cores and gravity cores operated by the Oregon State University Marine Rock and Sediment Sampling Group. Porewater samples were extracted from the sediment within hours of core retrieval in a refrigerated van. Rhizon samplers...

Cite Dataset

Porewater samples from gravity cores were collected as described in Komada et al. (2016) Geochim. Cosmochim. Acta, 176:259-278. Briefly, sediment cores were sectioned within hours of retrieval, then centrifuged, filtered (0.2 micron pore size). Porewater samples from multicores were extracted using Rhizon samplers (Seeberg-Elverfeldt et al., Limnol. Oceanogr. Meth., 8:361-371, 2005) to prevent contamination from squashed benthic macrofauna during centrifugation. Samples were immediately poisoned with HgCl2 and flame-sealed under a stream of high-purity nitrogen gas and refrigerated until analysis.

1H NMR spectra were acquired in 5-mm O.D. thin-wall precision NMR tube (Bel-Art Wilmad part #528-PP-7-5) in 5% D2O (Sigma Aldrich part #151882) using a Bruker Avance NEO 500 MHz instrument with Prodigy cryoprobe using W5-WATERGATE solvent suppression method (Lam and Simpson, Analyst, 133:263-269, 2008).