Dataset: Porewater geochemistry of sediments collected Fall 2019 in the Santa Barbara Basin using ROV Jason during R/V Atlantis cruise AT42-19

ValidatedRelease Date:2022-12-31Final no updates expectedDOI: 10.26008/1912/bco-dmo.867007.1Version 1 (2021-12-23)Dataset Type:Cruise Results

Principal Investigator, Contact: Tina Treude (University of California-Los Angeles)

Co-Principal Investigator: David L. Valentine (University of California-Santa Barbara)

BCO-DMO Data Manager: Dana Stuart Gerlach (Woods Hole Oceanographic Institution)

Project: Collaborative Research: Do benthic feedbacks couple sulfur, nitrogen and carbon biogeochemistry during transient deoxygenation? (BASIN)

Abstract

Sediments were collected in Fall 2019 across three transects in the Santa Barbara Basin using the ROV Jason during R/V Atlantis cruise AT42-19. Porewater was separated from the sediments and geochemical properties measured.

Cite Dataset

Sediments were collected with push cores (6 cm inner diameter) along three depth transects across the Santa Barbara Basin using the ROV Jason.  Porewater was separated from sediment by centrifugation (4300 x g for 20 mins) in anoxic centrifugation vials and subsampled for further analysis. 

Porewater geochemical properties were determined as listed:

  • Porewater sulfate concentrations were determined by ion chromatography (Metrohm 761).
  • Porewater sulfide concentrations were determined spectrophotometrically (Shimadzu UV-Spectrophotometer UV-1800) according to Cline (1969).
  • Porewater ammonium, iron (II), and phosphate concentrations were determined spectrophotometrically (Shimadzu UV-Spectrophotometer UV-1800) according to Grasshoff et al. (1999).
  • Porewater nitrate and nitrite concentrations were determined spectrophotometrically (Shimadzu UV-Spectrophotometer UV-1800) according to García-Robledo et al. (2014).
  • Porewater Total Alkalinity was determined by titration according to Dale et al. 2015. Porewater Dissolved Inorganic Carbon was determined using a flow injection system (Hall & Aller 1992).

Note:  Negative depths refer to measurements in the sediment core supernatant water.  Supernatant water was collected with an anoxic syringe prior to core slicing. 

Related Datasets

IsRelatedTo
Dataset: BASIN 2019 Microbial activity
Treude, T., Valentine, D. L. (2022) Microbial activity from sediments collected Fall 2019 in the Santa Barbara Basin using ROV Jason during R/V Atlantis cruise AT42-19. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2021-12-28 doi:10.26008/1912/bco-dmo.867221.1
IsRelatedTo
Dataset: BASIN 2019 Sediment properties
Treude, T., Valentine, D. L. (2022) Porosity and density of sediments collected Fall 2019 in the Santa Barbara Basin using ROV Jason during R/V Atlantis cruise AT42-19. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2021-12-28 doi:10.26008/1912/bco-dmo.867113.1

Related Publications

Methods
Cline, J. D. (1969). Spectrophotometric Determination of Hydrogen Sulfide in Natural Waters. Limnology and Oceanography, 14(3), 454–458. doi:10.4319/lo.1969.14.3.0454
Methods
Dale, A. W., Sommer, S., Lomnitz, U., Montes, I., Treude, T., Liebetrau, V., Gier, J., Hensen, C., Dengler, M., Stolpovsky, K., Bryant, L. D., & Wallmann, K. (2015). Organic carbon production, mineralisation and preservation on the Peruvian margin. In Biogeosciences (Vol. 12, Issue 5, pp. 1537–1559). Copernicus GmbH. https://doi.org/10.5194/bg-12-1537-2015
Methods
García-Robledo, E., Corzo, A., & Papaspyrou, S. (2014). A fast and direct spectrophotometric method for the sequential determination of nitrate and nitrite at low concentrations in small volumes. Marine Chemistry, 162, 30–36. doi:10.1016/j.marchem.2014.03.002
Methods
Grasshoff, K., Kremling, K., & Ehrhardt, M. (Eds.). (1999). Methods of Seawater Analysis. doi:10.1002/9783527613984
Methods
Hall, P. . J., & Aller, R. C. (1992). Rapid, small-volume, flow injection analysis for SCO2, and NH4+ in marine and freshwaters. Limnology and Oceanography, 37(5), 1113–1119. doi:10.4319/lo.1992.37.5.1113

Treude, T., Valentine, D. L. (2022) Porewater geochemistry of sediments collected Fall 2019 in the Santa Barbara Basin using ROV Jason during R/V Atlantis cruise AT42-19. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2021-12-23 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.867007.1 [access date]

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This dataset is licensed under Creative Commons Attribution 4.0.


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