http://lod.bco-dmo.org/id/dataset/1009552
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
2026-10-09
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Sediment multicore general organic, inorganic, stable isotope, and bulk radiocarbon data collected from R/V F.G. Walton Smith cruise WS23-139 along the Guianas mudbanks coast in June and July 2023
2026-10-12
publication
2026-10-12
revision
BCO-DMO Linked Data URI
2026-10-12
creation
http://lod.bco-dmo.org/id/dataset/1009552
Valier Galy
Woods Hole Oceanographic Institution
principalInvestigator
Brad Rosenheim
University of South Florida
principalInvestigator
Manuel Colombo
Virginia Institute of Marine Science
principalInvestigator
Ann Dunlea
Woods Hole Oceanographic Institution
principalInvestigator
Timothy I. Eglinton
ETH-Zurich
principalInvestigator
Negar Haghipour
ETH-Zurich
principalInvestigator
Christopher Hein
Virginia Institute of Marine Science
principalInvestigator
José Mauro Moura
Federal University of Western Pará
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: Rosenheim, B., Galy, V., Hein, C., Colombo, M., Dunlea, A., Eglinton, T. I., Moura, J. M., Haghipour, N. (2026) Sediment multicore general organic, inorganic, stable isotope, and bulk radiocarbon data collected from R/V F.G. Walton Smith cruise WS23-139 along the Guianas mudbanks coast in June and July 2023. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2026-10-12 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/1009552 [access date]
Guiana mudbanks multicore organic and inorganic geochemistry Dataset Description: Methods and Sampling: <p>Multicores from 14 different stations along the Guianas mudbanks coast (NE S. America, Brazil, French Guiana, and Suriname) were extruded and frozen aboard the R/V F.G. Walton Smith in the summer of 2023. Samples were subsequently portioned, with some portions dried (freeze-drying and oven-drying), acid-treated, and/or ground. Samples were analyzed in duplicate (acid-treated and not acid-treated) on an elemental analyzer connected to an isotope ratio mass spectrometer (IRMS) for nitrogen quantity and stable nitrogen isotope values (not acid-treated) and for carbon quantity, stable carbon isotope values, and carbon:nitrogen ratios (acid-treated).&nbsp;</p>
<p>A subset (n=35) of acid-treated samples was analyzed for bulk radiocarbon content. A subset (n=25) of non-acid-treated, unground samples was run for surface area, and all non-acid-treated and unground samples were measured for inorganic elemental content and grain size distribution. Sample names in this dataset include the code for the seagoing expedition (WS23-139), the multicore number, and the extrusion depth (in centimeters) from the multicore. Columns are provided with station numbers, latitude, longitude, and station name. The 14 stations aligned in sets of 3 cross-shelf transects (inner, middle, and outer) at 6 different locations along this coast.&nbsp;</p>
<p>Sediment samples were extruded on board the ship after cores were recovered. Extruded intervals were measured using a rotating core table on a calibrated threaded rod (Schwing et al., 2016). Extruded samples were placed in pre-combusted glass jars with pre-combusted foil covers and threaded lids, and they were frozen on board the ship. Upon return to the laboratories at the University of South Florida, samples were thawed and separated into three aliquots: acid treatment, no acid treatment, and archive.</p>
<p>Archive aliquots were refrozen.</p>
<p>Acid treatment consisted of rinsing with 1N HCl in pre-combusted glass beakers and rinsing with distilled water until pH testing strips rose to a stable pH when contacted with siphoned rinse water from the sediments. The sediments were dried at 50 degrees Celsius and ground. This aliquot was used for carbon isotopes, %TOC, C:N ratios, and radiocarbon measurements.</p>
<p>The non-acid-treated samples were divided for grain size analysis, surface area analysis, and inorganic geochemistry (undried, unground) and for nitrogen isotope, %C, and %N analyses (dried and ground). The %CaCO3 of the samples was calculated using the difference between %C and %TOC measurements, the latter of which had carbonate minerals removed by acid treatment, and the %TOC values were corrected for the missing mass of CaCO3 by multiplying the measured values by the term (1-%CaCO3). Both corrected and measured %TOC values are provided.</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1851494 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1851494
onGoing
Valier Galy
Woods Hole Oceanographic Institution
508-289-2340
266 Woods Hole Rd. FYE 107D, Mail Stop 04
Woods Hole
MA
02543
USA
vgaly@whoi.edu
pointOfContact
Brad Rosenheim
University of South Florida
727-553-3354
140 7th Avenue S
Saint Petersburg
FL
33701
US
brosenheim@usf.edu
pointOfContact
Manuel Colombo
Virginia Institute of Marine Science
VA
USA
mcolombo@vims.edu
pointOfContact
Ann Dunlea
Woods Hole Oceanographic Institution
Woods Hole
MA
USA
adunlea@whoi.edu
pointOfContact
Timothy I. Eglinton
ETH-Zurich
timothy.eglinton@erdw.ethz.ch
pointOfContact
Negar Haghipour
ETH-Zurich
negar.haghipour@eaps.ethz.ch
pointOfContact
Christopher Hein
Virginia Institute of Marine Science
VA
USA
chein@vims.edu
pointOfContact
José Mauro Moura
Federal University of Western Pará
jmaurosm@gmail.com
pointOfContact
asNeeded
Dataset Version: 1
Unknown
sample_ID
mass_mg
d15N
d13C
pct_N
pct_C
micromols_N
micromols_C
Fm
Si_wt_pct
Al_wt_pct
Ti_wt_pct
Fe_wt_pct
Mn_wt_pct
Ca_wt_pct
Mg_wt_pct
Na_wt_pct
K_wt_pct
Ba_microg_per_g
Cr_microg_per_g
Sc_microg_per_g
Sr_microg_per_g
V_microg_per_g
Y_microg_per_g
Zn_microg_per_g
Zr_microg_per_g
pct_clay
pct_silt
pct_vfn
pct_fine
pct_med
pct_crs
pct_vcrs
d10
d50
d90
mean
sorting
skewness
kurtosis
mass_mg_N
d15N_N
pct_C_N
C_to_N_mass_ratio
flags
top_depth
bottom_depth
core
pct_CaCO3
C_pct_corrected
C_to_N_mass_ratio2
C_to_N_mass_corrected
latitude
longitude
station_number
station_name
on_station_time_local
off_station_time_local
on_station_time_UTC
off_station_time_UTC
IonPlus Micadas Accelerator Mass Spectrometer
NOVA 4000e SA analyzer
Carlo Erba CHN 1108
ThermoFisher iCAP
ThermoFinnigan Delta+XL
Beckman Coulter Laser Diffraction Particle Size Analyzer
Sediment multicores
theme
None, User defined
sample identification
mass
d15N
d13C
Nitrogen
Elemental carbon (C)
Fraction modern
Silicon
Aluminum
Titanium
Iron
Manganese
Calcium
Magnesium
Sodium
potassium
Barium
Chromium
Scandium
Strontium
Vanadium
Yttrium (Y)
Zinc
Zirconium (Zr)
sediment grain size
Carbon to Nitrogen ratio (C:N)
flag
depth core
core id
Calcium Carbonate
latitude
longitude
station
ISO_DateTime_Local
ISO_DateTime_UTC
featureType
BCO-DMO Standard Parameters
Accelerator Mass Spectrometer
BET surface area analyzer
Carlo-Erba EA-1108 elemental analyzer
Inductively Coupled Plasma Mass Spectrometer
Isotope-ratio Mass Spectrometer
Laser Diffraction Particle Size Analyzer
Multi Corer
instrument
BCO-DMO Standard Instruments
WS23139
service
Deployment Activity
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.
Collaborative Research: What Happens to Terrestrial Organic Matter in the Ocean? Solving the Mystery Behind an Iconic Question
https://osprey.bco-dmo.org/project/907917
Collaborative Research: What Happens to Terrestrial Organic Matter in the Ocean? Solving the Mystery Behind an Iconic Question
<p><strong>NSF Award Abstract:</strong><br />
The Amazon River is one of the largest and most important rivers in the world. It not only carries water through the Amazon rain forests, it also carries mud - lots of mud. This mud settles when the river joins the ocean, forming the Amazon delta. Waves and wind re-suspend some of this mud, which forms mud banks that slowly move from the coast of Brazil, to French Guiana, Suriname, and Guyana. Not only do these mud banks shape the coastlines of these areas, but they also serve as a storage for carbon that had been removed from the atmosphere by the Amazon rainforest, dropped to the forest floor and washed into the river, ultimately transported on particles of mud into the Amazon delta. Normally, this represents a transfer of carbon from the atmosphere to the sediment and rock record, hiding it away for thousands to millions of years and participating in the natural regulation of atmospheric carbon dioxide concentration. However, the Amazon's special case of mud banks that travel hundreds of miles along the coast has long been believed to stir up this carbon and release most of it back to the atmosphere. This idea has held for decades, but if wrong, may have a large impact on our understanding of the ocean's carbon cycle. This research will use new science and technology to change the way we look at river carbon cycling in the ocean by sampling the mud banks, ocean waters, and Amazon River waters more thoroughly than has been previously done, with the aim to understand and quantify the storage of land-derived carbon in marine mudbank sediments offshore the Amazon River. This research will serve as the core of two Ph.D. dissertations and will interface with the Woods Hole Partnership Educational Program (PEP) to provide under-represented minority college students an opportunity to gain practical experience in marine and environmental sciences. The project will also be incorporated into the Saint Petersburg Science Fest, an event that brings several thousand school children to University of South Florida campus during one weekend every autumn to showcase different research projects and initiatives.</p>
<p>Twenty years ago, John Hedges posed a seminal question pertaining to the role of the ocean in the carbon cycle: "what happens to terrestrial organic matter in the oceans?" That question was set upon a conundrum - because riverine organic matter is highly degraded, it should be expected to suffer minimal respiration in the ocean, yet by most accounts continental margins seem to be incinerators of terrestrial organic matter. However, much of this paradigm was originally built upon biogeochemical studies of the Amazon sub-aqueous delta and the mobile fluidized mudbanks along the Guianas coast. However, preliminary state of the art characterizations of organic carbon in Amazon River and mudbank sediments suggest that a fraction of terrestrial organic carbon is actually not refractory and as such is rapidly and efficiently oxidized in the ocean, whereas another fraction is refractory and is in fact quantitatively preserved in marine sediments. Overall, the data suggest an underestimation of burial efficiency in the realm of 50-100%. This proposal focuses on gaining a transformative mechanistic and quantitative understanding of the fate of terrestrial organic carbon in the coastal ocean offshore of the Amazon River. This will be done through i) sampling the marine province offshore of the Guianas coast (the Guianas mudbanks) as well as the Amazon River delta, using a shallow-draft research vessel and ii) using novel state of the art geochemical analysis of organic carbon - in particular ramped oxidation and compound specific radiocarbon analysis - and elemental composition to demonstrate the selective nature of terrestrial organic carbon oxidation and provide new estimates of burial efficiency of this system - with implications for the global inventory of terrestrial organic carbon in the ocean.</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>
MUDBENCS
largerWorkCitation
project
eng; USA
oceans
-53.9354
-49.0968
1.1264
6.0707
2023-06-08
2023-06-16
Atlantic Ocean coastal waters, Brazil, French Guiana, Suriname
0
BCO-DMO catalogue of parameters from Sediment multicore general organic, inorganic, stable isotope, and bulk radiocarbon data collected from R/V F.G. Walton Smith cruise WS23-139 along the Guianas mudbanks coast in June and July 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/1009678.rdf
Name: sample_ID
Units: unitless
Description: <p>sample identification including ship abbreviation, year of expedition, sequential number of expedition, multicore number, depth range of sample in centimeters, and suffix for duplicate analyses</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009679.rdf
Name: mass_mg
Units: milligrams
Description: <p>mass of sample analyzed for organic geochemistry (stable carbon isotopes, carbon and nitrogen content, derived values)</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009680.rdf
Name: d15N
Units: permille
Description: <p>stable nitrogen isotope value from non-acidified sample normalized to AIR standard scale</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009681.rdf
Name: d13C
Units: permille
Description: <p>stable carbon isotope value from acidified sample normalized to PDB standard scale</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009682.rdf
Name: pct_N
Units: percent
Description: <p>weight percent of nitrogen in acidified sample</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009683.rdf
Name: pct_C
Units: percent
Description: <p>weight percent of carbon in acidified sample</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009684.rdf
Name: micromols_N
Units: micromoles
Description: <p>number of micromoles of nitrogen measured in mass of acidified sample</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009685.rdf
Name: micromols_C
Units: micromoles
Description: <p>number of micromoles of carbon measured in mass of acidified sample</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009686.rdf
Name: Fm
Units: proportion activity ratio of the measured sample relative to activity ratio of 1950 wood
Description: <p>fraction modern radiocarbon value</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009687.rdf
Name: Si_wt_pct
Units: percent
Description: <p>weight percent of silicon</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009688.rdf
Name: Al_wt_pct
Units: percent
Description: <p>weight percent of aluminum</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009689.rdf
Name: Ti_wt_pct
Units: percent
Description: <p>weight percent of titanium</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009690.rdf
Name: Fe_wt_pct
Units: percent
Description: <p>weight percent of iron</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009691.rdf
Name: Mn_wt_pct
Units: percent
Description: <p>weight percent of manganese</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009692.rdf
Name: Ca_wt_pct
Units: percent
Description: <p>weight percent of calcium</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009693.rdf
Name: Mg_wt_pct
Units: percent
Description: <p>weight percent of magnesium</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009694.rdf
Name: Na_wt_pct
Units: percent
Description: <p>weight percent of sodium</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009695.rdf
Name: K_wt_pct
Units: percent
Description: <p>weight percent of potassium</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009696.rdf
Name: Ba_microg_per_g
Units: micrograms Ba per gram sediment
Description: <p>barium content, micrograms per gram</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009697.rdf
Name: Cr_microg_per_g
Units: micrograms Cr per gram sediment
Description: <p>chromium content, micrograms per gram</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009698.rdf
Name: Sc_microg_per_g
Units: micrograms Sc per gram sediment
Description: <p>scandium content, micrograms per gram</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009699.rdf
Name: Sr_microg_per_g
Units: micrograms Sr per gram sediment
Description: <p>strontium content, micrograms per gram</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009700.rdf
Name: V_microg_per_g
Units: micrograms V per gram sediment
Description: <p>vanadium content, micrograms per gram</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009701.rdf
Name: Y_microg_per_g
Units: micrograms Y per gram sediment
Description: <p>yttrium content, micrograms per gram</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009702.rdf
Name: Zn_microg_per_g
Units: micrograms Zn per gram sediment
Description: <p>zinc content, micrograms per gram</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009703.rdf
Name: Zr_microg_per_g
Units: micrograms Zr per gram sediment
Description: <p>zirconium content, micrograms per gram</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009704.rdf
Name: pct_clay
Units: percent
Description: <p>percent clay</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009705.rdf
Name: pct_silt
Units: percent
Description: <p>percent silt</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009706.rdf
Name: pct_vfn
Units: percent
Description: <p>percent very fine</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009707.rdf
Name: pct_fine
Units: percent
Description: <p>percent fine</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009708.rdf
Name: pct_med
Units: percent
Description: <p>percent medium</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009709.rdf
Name: pct_crs
Units: percent
Description: <p>percent coarse</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009710.rdf
Name: pct_vcrs
Units: percent
Description: <p>percent very coarse</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009711.rdf
Name: d10
Units: micrometers
Description: <p>grain diameter at the 10th percentile</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009712.rdf
Name: d50
Units: micrometers
Description: <p>grain diameter at the 50th percentile</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009713.rdf
Name: d90
Units: micrometers
Description: <p>grain diameter at the 90th percentile</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009714.rdf
Name: mean
Units: micrometers
Description: <p>mean grain diameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009715.rdf
Name: sorting
Units: dimensionless
Description: <p>statistic for variability in grain size</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009716.rdf
Name: skewness
Units: dimensionless
Description: <p>moment coefficient of skewness of grain size distribution</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009717.rdf
Name: kurtosis
Units: dimensionless
Description: <p>moment coefficient of kurtosis of grain size distribution</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009718.rdf
Name: mass_mg_N
Units: milligrams
Description: <p>mass of unacidified sample analyzed for organic geochemistry (stable nitrogen isotopes, derived values)</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009719.rdf
Name: d15N_N
Units: permille
Description: <p>stable nitrogen isotope value from unacidified samples relative to AIR standard scale</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009720.rdf
Name: pct_C_N
Units: percent
Description: <p>weight percent of carbon in unacidified sample</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009721.rdf
Name: C_to_N_mass_ratio
Units: dimensionless
Description: <p>mass ratio of carbon to nitrogen in acidified sample</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009722.rdf
Name: flags
Units: unitless
Description: <p>Flags/comments</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009723.rdf
Name: top_depth
Units: centimeters (cm)
Description: <p>depth at the top of the multicore</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009724.rdf
Name: bottom_depth
Units: centimeters (cm)
Description: <p>depth at the bottom of the multicore</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009725.rdf
Name: core
Units: unitless
Description: <p>sequential core number</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009726.rdf
Name: pct_CaCO3
Units: percent
Description: <p>percent calcium carbon calculated from different in C_pct between acidified and unacidified samples</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009727.rdf
Name: C_pct_corrected
Units: percent
Description: <p>carbon content of acidified sample corrected for missing mass of CaCO3 removed by acidification</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009728.rdf
Name: C_to_N_mass_ratio2
Units: dimensionless
Description: <p>mass ratio of carbon to nitrogen in acidified sample</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009729.rdf
Name: C_to_N_mass_corrected
Units: dimensionless
Description: <p>mass ratio of carbon to nitrogen in acidified samples using the C_pct_corrected variable</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009730.rdf
Name: latitude
Units: decimal degrees
Description: <p>latitude</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009732.rdf
Name: longitude
Units: decimal degrees
Description: <p>longitude</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009734.rdf
Name: station_number
Units: unitless
Description: <p>sequential station number</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009735.rdf
Name: station_name
Units: unitless
Description: <p>station name</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009736.rdf
Name: on_station_time_local
Units: unitless
Description: <p>date and time that over-the-side work began on station, local time zone of UTC-3</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009737.rdf
Name: off_station_time_local
Units: unitless
Description: <p>date and time that over-the-side work ended on station, local time zone of UTC-3</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009738.rdf
Name: on_station_time_UTC
Units: unitless
Description: <p>date and time that over-the-side work began on station, UTC time zone</p>
http://lod.bco-dmo.org/id/dataset-parameter/1009740.rdf
Name: off_station_time_UTC
Units: unitless
Description: <p>date and time that over-the-side work ended on station, UTC time zone</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://osprey.bco-dmo.org/dataset/1009552/data/download
download
onLine
dataset
<p>Multicores from 14 different stations along the Guianas mudbanks coast (NE S. America, Brazil, French Guiana, and Suriname) were extruded and frozen aboard the R/V F.G. Walton Smith in the summer of 2023. Samples were subsequently portioned, with some portions dried (freeze-drying and oven-drying), acid-treated, and/or ground. Samples were analyzed in duplicate (acid-treated and not acid-treated) on an elemental analyzer connected to an isotope ratio mass spectrometer (IRMS) for nitrogen quantity and stable nitrogen isotope values (not acid-treated) and for carbon quantity, stable carbon isotope values, and carbon:nitrogen ratios (acid-treated).&nbsp;</p>
<p>A subset (n=35) of acid-treated samples was analyzed for bulk radiocarbon content. A subset (n=25) of non-acid-treated, unground samples was run for surface area, and all non-acid-treated and unground samples were measured for inorganic elemental content and grain size distribution. Sample names in this dataset include the code for the seagoing expedition (WS23-139), the multicore number, and the extrusion depth (in centimeters) from the multicore. Columns are provided with station numbers, latitude, longitude, and station name. The 14 stations aligned in sets of 3 cross-shelf transects (inner, middle, and outer) at 6 different locations along this coast.&nbsp;</p>
<p>Sediment samples were extruded on board the ship after cores were recovered. Extruded intervals were measured using a rotating core table on a calibrated threaded rod (Schwing et al., 2016). Extruded samples were placed in pre-combusted glass jars with pre-combusted foil covers and threaded lids, and they were frozen on board the ship. Upon return to the laboratories at the University of South Florida, samples were thawed and separated into three aliquots: acid treatment, no acid treatment, and archive.</p>
<p>Archive aliquots were refrozen.</p>
<p>Acid treatment consisted of rinsing with 1N HCl in pre-combusted glass beakers and rinsing with distilled water until pH testing strips rose to a stable pH when contacted with siphoned rinse water from the sediments. The sediments were dried at 50 degrees Celsius and ground. This aliquot was used for carbon isotopes, %TOC, C:N ratios, and radiocarbon measurements.</p>
<p>The non-acid-treated samples were divided for grain size analysis, surface area analysis, and inorganic geochemistry (undried, unground) and for nitrogen isotope, %C, and %N analyses (dried and ground). The %CaCO3 of the samples was calculated using the difference between %C and %TOC measurements, the latter of which had carbonate minerals removed by acid treatment, and the %TOC values were corrected for the missing mass of CaCO3 by multiplying the measured values by the term (1-%CaCO3). Both corrected and measured %TOC values are provided.</p>
Specified by the Principal Investigator(s)
<p>Stable isotope data were transferred to the international stable isotope scales of PDB (carbon isotopes) and AIR (nitrogen isotopes) by measuring laboratory reference materials that were calibrated to those scales. Radiocarbon data were transferred to fraction modern values using standards offered by the International Atomic Energy Association. Nitrogen and carbon composition of the organic matter was calculated from...</p>
<p>Calculation of the amount of CaCO3 and correction of %TOC are explained under the methods section. Data from different sources were merged using the pandas package (v. 2.2.2) of Python (v. 3.14.0) and output as a single .csv file.</p>
Specified by the Principal Investigator(s)
This section documents curation actions performed prior to publication review with the submitter, and additional information relevant to understanding and reusing this dataset. It distinguishes changes made to the submitted (meta)data from unresolved issues and/or enhancements that improve future reuse and interoperability.
CURATION ACTIONS PERFORMED ON DATA
- Imported original file "MUDBENCS_MC_data_repository.csv" into the BCO-DMO data processing system.
- Deleted the unnamed column containing row numbers.
- Renamed columns to comply with BCO-DMO naming conventions.
- Replaced a non-standard character in the station_name value "Uaça Outer" with "Uaca Outer".
- Converted format and renamed column "on_station_time" to "on_station_time_local" (no timezone conversion, format change of %Y-%m-%d %H:%M:%S to %Y-%m-%dT%H:%M:%S).
- Converted "off_station_time" to local datetime "off_station_time_local" similarly.
- Converted "on_station_time" with input timezone of UTC-3 to UTC and named the new column "on_station_time_UTC".
- Converted "off_station_time" with input timezone of UTC-3 to UTC and named the new column "off_station_time_UTC".
- Deleted original on_station_time and off_station_time columns after creating local/UTC variants.
- Saved the final file as "1009552_v1_guiana_mudbanks_multicore.csv".
CURATION ACTIONS PERFORMED ON METADATA
- BCO-DMO's standard metadata entry and text formatting steps were performed. See: https://www.bco-dmo.org/how-to/standard-curation-edits
ISSUES POTENTIALLY IMPACTING REUSE
- The "Data Processing" section is incomplete.
- C to N mass ratio appears twice in the dataset as columns "C_to_N_mass_ratio" and "C_to_N_mass_ratio2". It is not known if or how these differ.
Specified by BCO-DMO Data Managers
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Biological and Chemical Oceanography Data Management Office (BCO-DMO)
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Woods Hole
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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
IonPlus Micadas Accelerator Mass Spectrometer
IonPlus Micadas Accelerator Mass Spectrometer
PI Supplied Instrument Name: IonPlus Micadas Accelerator Mass Spectrometer PI Supplied Instrument Description:Radiocarbon: IonPlus Micadas Accelerator Mass Spectrometer Instrument Name: Accelerator Mass Spectrometer Instrument Short Name:AMS Instrument Description: An AMS measures "long-lived radionuclides that occur naturally in our environment. AMS uses a particle accelerator in conjunction with ion sources, large magnets, and detectors to separate out interferences and count single atoms in the presence of 1x1015 (a thousand million million) stable atoms, measuring the mass-to-charge ratio of the products of sample molecule disassociation, atom ionization and ion acceleration." AMS permits ultra low-level measurement of compound concentrations and isotope ratios that traditional alpha-spectrometry cannot provide. More from Purdue University: http://www.physics.purdue.edu/primelab/introduction/ams.html Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB17/
NOVA 4000e SA analyzer
NOVA 4000e SA analyzer
PI Supplied Instrument Name: NOVA 4000e SA analyzer PI Supplied Instrument Description:Surface Area: Quantachrome Surface Area Analyzer (NOVA 4000e SA analyzer; Quantachrome Instruments, USA) Instrument Name: BET surface area analyzer Instrument Short Name: Instrument Description: Also called a "Gas Adsorption Surface Area Analyzer". A BET surface area analyzer is a laboratory instrument used to determine the specific surface area of solid materials using gas adsorption techniques, typically based on the Brunauer-Emmett-Teller (BET) method. The instrument measures the quantity of gas, commonly nitrogen, adsorbed onto the surface of a solid sample at different pressures. Depending on the model, it may also be used to determine pore volume and pore size distribution.
Carlo Erba CHN 1108
Carlo Erba CHN 1108
PI Supplied Instrument Name: Carlo Erba CHN 1108 PI Supplied Instrument Description:Stable isotopes and elemental content, organic matter: ThermoFinnigan Delta+XL IRMS, Carlo Erba CHN 1108 Instrument Name: Carlo-Erba EA-1108 elemental analyzer Instrument Short Name:Carlo-Erba EA 1108 Instrument Description: An elemental analyzer that simultaneously determines the total carbon, hydrogen, nitrogen, and sulfur in a small solid or liquid sample. A sample is put into a tin capsule that is placed in the combustion tube. Here, the sample is in an oxygen-rich gas stream, which causes flash combustion of the tin capsule, and in turn, the sample is rapidly combusted. The resulting gases are separated on a packed gas chromatography column and quantified using a thermal conductivity detector. The instrument was originally manufactured by Carlo-Erba, which has since been replaced by Thermo Scientific (part of Thermo Fisher Scientific). This model is no longer in production. It is also possible to determine oxygen with a modification to the systems configuration. Analysis times: CHN in 7 min, S in 5 min and O in 6 min. Range: 10 ppm to 100%.
ThermoFisher iCAP
ThermoFisher iCAP
PI Supplied Instrument Name: ThermoFisher iCAP PI Supplied Instrument Description:Inorganic elemental content: ThermoFisher iCAP inductively coupled plasma mass spectrometer Instrument Name: Inductively Coupled Plasma Mass Spectrometer Instrument Short Name:ICP Mass Spec Instrument Description: An ICP Mass Spec is an instrument that passes nebulized samples into an inductively-coupled gas plasma (8-10000 K) where they are atomized and ionized. Ions of specific mass-to-charge ratios are quantified in a quadrupole mass spectrometer. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB15/
ThermoFinnigan Delta+XL
ThermoFinnigan Delta+XL
PI Supplied Instrument Name: ThermoFinnigan Delta+XL PI Supplied Instrument Description:Stable isotopes and elemental content, organic matter: ThermoFinnigan Delta+XL IRMS, Carlo Erba CHN 1108 Instrument Name: Isotope-ratio Mass Spectrometer Instrument Short Name:IR Mass Spec; IRMS Instrument Description: The Isotope-ratio Mass Spectrometer is a particular type of mass spectrometer used to measure the relative abundance of isotopes in a given sample (e.g. VG Prism II Isotope Ratio Mass-Spectrometer). Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB16/
Beckman Coulter Laser Diffraction Particle Size Analyzer
Beckman Coulter Laser Diffraction Particle Size Analyzer
PI Supplied Instrument Name: Beckman Coulter Laser Diffraction Particle Size Analyzer PI Supplied Instrument Description:Grain size: Beckman Coulter Laser Diffraction Particle Size Analyzer Instrument Name: Laser Diffraction Particle Size Analyzer Instrument Short Name: Instrument Description: Laser diffraction is particle sizing technique for materials ranging from hundreds of nanometers up to several millimeters in size. Laser diffraction measures particle size distributions by measuring the angular variation in intensity of light scattered as a laser beam passes through a dispersed particulate sample. One example is the Beckman Coulter LS200. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/150/
Sediment multicores
Sediment multicores
PI Supplied Instrument Name: Sediment multicores 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/
Cruise: WS23139
WS23139
R/V F.G. Walton Smith
Community Standard Description
International Council for the Exploration of the Sea
R/V F.G. Walton Smith
vessel
WS23139
Brad Rosenheim
University of South Florida
R/V F.G. Walton Smith
Community Standard Description
International Council for the Exploration of the Sea
R/V F.G. Walton Smith
vessel