http://lod.bco-dmo.org/id/dataset/992752
eng; USA
utf8
dataset
Highest level of data collection, from a common set of sensors or instrumentation, usually within the same research project
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
2026-01-21
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Porewater geochemistry data from sediment cores collected on R/V Rachel Carson cruise RC0107 in Clayoquot Sound, Vancouver Island, British Columbia during October 2023
2026-01-21
publication
2026-01-21
revision
Woods Hole Oceanographic Institution (WHOI BCO-DMO)
2026-02-11
publication
https://doi.org/10.26008/1912/bco-dmo.992752.1
Morgan Reed Raven
University of California-Santa Barbara
principalInvestigator
Natalya Evans
University of California-Santa Barbara
principalInvestigator
Aaron Martinez
University of California-Santa Barbara
principalInvestigator
Jacquelyn A. Neibauer
University of Washington
principalInvestigator
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
publisher
Cite this dataset as: Crotteau, M., Raven, M. R., Martinez, A., Evans, N., Karagiannis, M., Fishburn, J., Neibauer, J. A. (2026) Porewater geochemistry data from sediment cores collected on R/V Rachel Carson cruise RC0107 in Clayoquot Sound, Vancouver Island, British Columbia during October 2023. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2026-01-21 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.992752.1 [access date]
Porewater geochemistry Dataset Description: <p>This dataset is one of three datasets presenting marine biogeochemistry data from four sites in Clayoquot Sound, Vancouver Island, British Columbia from water, sediment, and porewater samples that were collected aboard the R/V Rachel Carson in October 2023. These sites were selected because they represent hotspots of organic carbon burial spanning a range of geochemical conditions. They represent a range of oxic to historically anoxic water columns, and receive organic matter inputs varying from predominantly terrestrial to predominantly marine sources. Together, these datasets provide a framework to evaluate the controls and drivers of organic matter preservation in fjord sediments. See the "Related Datasets" section for the other datasets.</p> Methods and Sampling: <p>Three sediment cores were collected at each of three sites in Clayoquot Sound, Vancouver Island, Canada in October 2023. One core was used for porewater sampling; this core was sampled immediately with Rhizon samplers. A second core was extruded under argon for geochemical measurements. (See "Related Datasets" for the sediment geochemical data.) 1 milliliter (mL) of sediment was added to a cryovial and frozen at -20 degrees Celsius (°C) for future DNA extraction. 5 mL of sediment was added to an exetainer containing 5 mL of 1 N NaOH to measure sediment methane concentrations. The remaining sediment from each extruded interval was added immediately to falcon tubes containing 10 mL of 20% zinc acetate to precipitate sulfides and halt microbial activity. A third archive core was immediately frozen at -20°C.</p>
<p>Porewater samples from each core were aliquoted to measure pH and the concentrations of dissolved Fe(II), sulfate, and sulfide. pH was determined using the dye meta-cresol purple via a UV-Vis spectrophotometer (Genesys 150) (Clayton and Byrne 1993). Fe(II) was determined using a ferrozine assay (Jeitner 2014). Sulfate was measured via ion chromatography (Metrohm 930 Compact IC Flex). Sulfide was precipitated as zinc sulfide in the field by adding 4 mL of porewater to 4 mL of sparged 20% zinc acetate solution. To avoid sulfate contamination, porewater zinc sulfide samples were subjected to a strong acid hydrolysis (6 N HCl, 60°C, 2 hours) under N₂ to volatilize zinc sulfides; sulfide was trapped as zinc sulfide in 5% zinc acetate solution, oxidized to sulfate with 30% H₂O₂, and measured via ion chromatography (Metrohm 930 Compact IC Flex).</p>
<p>Samples analyzed in this study were collected within Ahousaht Territory, on the west coast of Vancouver Island, British Columbia. We respectfully acknowledge the Ahousaht Nation and the Maaqutusiis Hahoulthee Stewardship Society for their stewardship of these lands and for the opportunity to conduct research within their territory.</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-2143817 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=2143817
completed
Morgan Reed Raven
University of California-Santa Barbara
626-644-0273
Santa Barbara
CA
93106-2050
US
raven@ucsb.edu
pointOfContact
Natalya Evans
University of California-Santa Barbara
ncevans@ucsb.edu
pointOfContact
Aaron Martinez
University of California-Santa Barbara
aaronmartinez@ucsb.edu
pointOfContact
Jacquelyn A. Neibauer
University of Washington
jaqui@uw.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
site
latitude
longitude
date
core
depth
H2S
H2S_e
SO4
SO4_e
Fe
Fe_e
pH
Metrosep A Supp 5 100/4.0 column and Metrohm 930 Compact IC Flex
Multicorer
Genesys 150 UV-Vis Spectrophotometer
theme
None, User defined
site
latitude
longitude
date
sample description
depth below seafloor
H2S
sulfate
Iron
pH
featureType
BCO-DMO Standard Parameters
Ion Chromatograph
Multi Corer
Spectrophotometer
instrument
BCO-DMO Standard Instruments
RC0107
service
Deployment Activity
Clayoquot Sound, Vancouver Island, British Columbia
place
Locations
otherRestrictions
otherRestrictions
Access Constraints: none. Use Constraints: Please follow guidelines at: http://www.bco-dmo.org/terms-use Distribution liability: Under no circumstances shall BCO-DMO be liable for any direct, incidental, special, consequential, indirect, or punitive damages that result from the use of, or the inability to use, the materials in this data submission. If you are dissatisfied with any materials in this data submission your sole and exclusive remedy is to discontinue use.
CAREER: Cryptic sulfur cycling and organic matter preservation in marine oxygen deficient zones
https://osprey.bco-dmo.org/project/920983
CAREER: Cryptic sulfur cycling and organic matter preservation in marine oxygen deficient zones
<p><em><strong>NSF Award Abstract:</strong></em></p>
<p>CAREER: Particle-Hosted Sulfur Cycling and Organic Matter Burial in Oxygen Deficient Zones</p>
<p>Areas of the ocean without dissolved oxygen are called anoxic zones. These environments are increasing due to human activities and climate change. Large amounts of organic carbon are buried in sediments below anoxic zones. However, we do not fully understand why organic carbon is preserved in these zones. This project seeks to understand a newly discovered process that may contribute to carbon preservation in anoxic zones. The process is called organic matter sulfurization. Through this process, organic matter is transformed and effectively 'pickled' by reacting with sulfide. Rapid sulfurization reactions were identified for the first time in sinking marine particles and may have larger effect on carbon burial in sediments than previously thought. This project will be the first to provide measurements of the scale and significance of rapid organic matter sulfurization in modern anoxic zones. This project includes field and laboratory studies. The research will involve a team of students, including a graduate student and six undergraduates, who will be supported through a peer mentorship program. Undergraduate researchers will be recruited from the inaugural class of a newly developed Practical Research Skills course (Earth 101A) at the University of California Santa Barbara. It seeks to help undergraduates develop critical thinking and observational skills that have broad applicability. This project will launch a self-sustaining and vigorous research program in marine biogeochemistry, heavily invested in undergraduate research education, with impacts that will outlast its five-year duration.</p>
<p>The overarching research goal of this project is to assess the contribution of sulfurization reactions to organic carbon preservation in anoxic environments. After constructing and testing a set of customized particle traps, an expedition will be conducted to the marine anoxic zone off the coast of Mexico. Sinking particles, suspended materials, and surface sediments will be collected at three sites on the Mexican shelf and slope, that have generally high local productivity and gradients in bottom-water oxygen concentration. In the field, the rates and isotopic fractionation of microbial sulfate reduction and organic sulfur formation will be measured with stable and radioactive isotope tracers. Subsequently, organic sulfur sources from both natural samples and laboratory experiments will be characterized using mass spectrometry, X-ray absorption spectroscopy, and other geochemical techniques. Together, the results of this work will identify the timing and location of organic matter sulfurization in this environment, which have substantial implications for both modeling marine carbon fluxes and interpreting the geologic record. This study will provide the first quantitative estimates of the scale of organic matter sulfurization in anoxic marine zones, its contribution to sedimentary carbon burial, and its sensitivities to environmental change. Simultaneously, this project will improve the Earth Science undergraduate curriculum at the University of California Santa Barbara through the development of a clear, supportive, and accessible mechanism for including students in research.</p>
<p>This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.</p>
Sulfur in Particles
largerWorkCitation
project
eng; USA
oceans
Clayoquot Sound, Vancouver Island, British Columbia
-125.7
-125.6
49.17
49.23
2024-10-04
2024-10-06
Eastern tropical North Pacific
0
BCO-DMO catalogue of parameters from Porewater geochemistry data from sediment cores collected on R/V Rachel Carson cruise RC0107 in Clayoquot Sound, Vancouver Island, British Columbia during October 2023
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
http://lod.bco-dmo.org/id/dataset-parameter/992805.rdf
Name: site
Units: unitless
Description: <p>Site number (51.5, 47, or 48) where sediment core was taken</p>
http://lod.bco-dmo.org/id/dataset-parameter/992806.rdf
Name: latitude
Units: decimal degrees
Description: <p>Latitude of sampling location</p>
http://lod.bco-dmo.org/id/dataset-parameter/992807.rdf
Name: longitude
Units: decimal degrees
Description: <p>Longitude of sampling location</p>
http://lod.bco-dmo.org/id/dataset-parameter/992808.rdf
Name: date
Units: unitless
Description: <p>Date sample was collected</p>
http://lod.bco-dmo.org/id/dataset-parameter/992809.rdf
Name: core
Units: unitless
Description: <p>The sediment cores were labeled porewater, highres, and archive</p>
http://lod.bco-dmo.org/id/dataset-parameter/992810.rdf
Name: depth
Units: centimeters
Description: <p>Sampling depth relative to sediment-water interface</p>
http://lod.bco-dmo.org/id/dataset-parameter/992811.rdf
Name: H2S
Units: millimolar
Description: <p>Concentration of porewater sulfide</p>
http://lod.bco-dmo.org/id/dataset-parameter/992812.rdf
Name: H2S_e
Units: millimolar
Description: <p>Error associated with H2S</p>
http://lod.bco-dmo.org/id/dataset-parameter/992813.rdf
Name: SO4
Units: millimolar
Description: <p>Concentration of porewater sulfate</p>
http://lod.bco-dmo.org/id/dataset-parameter/992814.rdf
Name: SO4_e
Units: millimolar
Description: <p>Error associated with SO4</p>
http://lod.bco-dmo.org/id/dataset-parameter/992815.rdf
Name: Fe
Units: micromolar
Description: <p>Concentration of dissolved Fe(II) in sediment porewater</p>
http://lod.bco-dmo.org/id/dataset-parameter/992816.rdf
Name: Fe_e
Units: micromolar
Description: <p>Error associated with Fe</p>
http://lod.bco-dmo.org/id/dataset-parameter/992817.rdf
Name: pH
Units: unitless
Description: <p>pH of sediment porewater</p>
GB/NERC/BODC > British Oceanographic Data Centre, Natural Environment Research Council, United Kingdom
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
https://doi.org/10.26008/1912/bco-dmo.992752.1
download
onLine
dataset
<p>Three sediment cores were collected at each of three sites in Clayoquot Sound, Vancouver Island, Canada in October 2023. One core was used for porewater sampling; this core was sampled immediately with Rhizon samplers. A second core was extruded under argon for geochemical measurements. (See "Related Datasets" for the sediment geochemical data.) 1 milliliter (mL) of sediment was added to a cryovial and frozen at -20 degrees Celsius (°C) for future DNA extraction. 5 mL of sediment was added to an exetainer containing 5 mL of 1 N NaOH to measure sediment methane concentrations. The remaining sediment from each extruded interval was added immediately to falcon tubes containing 10 mL of 20% zinc acetate to precipitate sulfides and halt microbial activity. A third archive core was immediately frozen at -20°C.</p>
<p>Porewater samples from each core were aliquoted to measure pH and the concentrations of dissolved Fe(II), sulfate, and sulfide. pH was determined using the dye meta-cresol purple via a UV-Vis spectrophotometer (Genesys 150) (Clayton and Byrne 1993). Fe(II) was determined using a ferrozine assay (Jeitner 2014). Sulfate was measured via ion chromatography (Metrohm 930 Compact IC Flex). Sulfide was precipitated as zinc sulfide in the field by adding 4 mL of porewater to 4 mL of sparged 20% zinc acetate solution. To avoid sulfate contamination, porewater zinc sulfide samples were subjected to a strong acid hydrolysis (6 N HCl, 60°C, 2 hours) under N₂ to volatilize zinc sulfides; sulfide was trapped as zinc sulfide in 5% zinc acetate solution, oxidized to sulfate with 30% H₂O₂, and measured via ion chromatography (Metrohm 930 Compact IC Flex).</p>
<p>Samples analyzed in this study were collected within Ahousaht Territory, on the west coast of Vancouver Island, British Columbia. We respectfully acknowledge the Ahousaht Nation and the Maaqutusiis Hahoulthee Stewardship Society for their stewardship of these lands and for the opportunity to conduct research within their territory.</p>
Specified by the Principal Investigator(s)
<p>Organic C/N/S concentrations were calculated with a sulfanilamide standard curve (0.5 – 25 micromoles (µmole) N, 1.5 – 75 µmole C, 0.25 – 12 µmole S). Sample δ13C values were calibrated using carbon isotope standards USGS-61 (35.05‰), 62 (-14.79‰), and 63 (1.17‰) run in triplicate and are reported relative to Vienna Pee Dee Belemnite. Sulfate concentrations were calibrated using a sulfate standard curve (0.1 – 100 parts per million (ppm)). Fe(II) concentrations were calibrated using a Fe(II) standard curve (0 – 80 µM).</p>
Specified by the Principal Investigator(s)
- Imported original file "20251007_FJ_porewater.csv" into the BCO-DMO system.
- Converted the date field to YYYY-MM-DD format.
- Saved the final file as "992752_v1_porewater_geochemistry.csv".
Specified by BCO-DMO Data Managers
asNeeded
7.x-1.1
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
Metrosep A Supp 5 100/4.0 column and Metrohm 930 Compact IC Flex
Metrosep A Supp 5 100/4.0 column and Metrohm 930 Compact IC Flex
PI Supplied Instrument Name: Metrosep A Supp 5 100/4.0 column and Metrohm 930 Compact IC Flex PI Supplied Instrument Description:Used to measure concentrations of sulfate, sulfide, AVS, and CRS. Instrument Name: Ion Chromatograph Instrument Short Name:Ion Chromatograph Instrument Description: Ion chromatography is a form of liquid chromatography that measures concentrations of ionic species by separating them based on their interaction with a resin. Ionic species separate differently depending on species type and size. Ion chromatographs are able to measure concentrations of major anions, such as fluoride, chloride, nitrate, nitrite, and sulfate, as well as major cations such as lithium, sodium, ammonium, potassium, calcium, and magnesium in the parts-per-billion (ppb) range. (from http://serc.carleton.edu/microbelife/research_methods/biogeochemical/ic.html)
Multicorer
Multicorer
PI Supplied Instrument Name: Multicorer PI Supplied Instrument Description:Used to collect sediment cores. Instrument Name: Multi Corer Instrument Short Name:Multi Corer Instrument Description: The Multi Corer is a benthic coring device used to collect multiple, simultaneous, undisturbed sediment/water samples from the seafloor. Multiple coring tubes with varying sampling capacity depending on tube dimensions are mounted in a frame designed to sample the deep ocean seafloor. For more information, see Barnett et al. (1984) in Oceanologica Acta, 7, pp. 399-408. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/51/
Genesys 150 UV-Vis Spectrophotometer
Genesys 150 UV-Vis Spectrophotometer
PI Supplied Instrument Name: Genesys 150 UV-Vis Spectrophotometer PI Supplied Instrument Description:Used to measure Fe(II) and pH. Instrument Name: Spectrophotometer Instrument Short Name:Spectrophotometer Instrument Description: An instrument used to measure the relative absorption of electromagnetic radiation of different wavelengths in the near infra-red, visible and ultraviolet wavebands by samples. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB20/
Cruise: RC0107
RC0107
R/V Rachel Carson (UW)
Community Standard Description
International Council for the Exploration of the Sea
R/V Rachel Carson (UW)
vessel
RC0107
Morgan Reed Raven
University of Washington
R/V Rachel Carson (UW)
Community Standard Description
International Council for the Exploration of the Sea
R/V Rachel Carson (UW)
vessel