http://lod.bco-dmo.org/id/dataset/908387
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
2023-09-14
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Atlantic sediment radiocarbon from mult-corer samples collected in the Amazon Delta and Sierra Leone Rise during R/V Endeavor cruises EN-480 and EN-481 in 2010
2023-09-14
publication
2023-09-14
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2023-10-06
publication
https://doi.org/10.26008/1912/bco-dmo.908387.1
Rainer Lohmann
University of Rhode Island
principalInvestigator
Kari Ann St. Laurent
University of Rhode Island
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: St. Laurent, K. A., Lohmann, R. (2023) Atlantic sediment radiocarbon from mult-corer samples collected in the Amazon Delta and Sierra Leone Rise during R/V Endeavor cruises EN-480 and EN-481 in 2010. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2023-09-14 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.908387.1 [access date]
Methods and Sampling: <p>Sediment samples were collected via a 4-barrel multi-corer (R/V Endeavor, segmented into 1-2 cm sections, dried in a drying oven (35°C) and homogenized via mortar and pestle. Sediments were decalcified using 10% hydrochloric acid. Black carbon was isolated using the chemothermal oxidation at 375°C method.<br />
<br />
&nbsp;</p>
<div>Radiocarbon data were analyzed at the National Ocean Sciences Accelerator Mass Spectrometry Facility (NOSAMS) at the Woods Hole Oceanic Institute using the “reconnaissance” method as described by Burke et al., 2010 and McIntyre et al., 2011. The blank-corrected fraction modern is also reported as described by Burke et al., 2010. The AMS is a commissioned continuous-flow AMS system.</div>
<div>&nbsp;</div>
<p>Instruments:&nbsp;<br />
<br />
Both the total organic carbon&nbsp; (~0.10 to 0.35 mgC) and black carbon (~0.15 to 0.80 mgC) samples were combusted into carbon dioxide using a modified elemental analyzer and then converted to graphite using a zinc reduction method before analysis on an Accelerator Mass Spectrometer.<br />
<br />
LOCATION:<br />
Amazon Delta (approximately: 4 N, 47 W; 2400-3500m); Sierra Leone Rise (approximately: 7 N, 20 W; 2800-3800m).</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1924191 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1924191
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-0851044 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=0851044
completed
Rainer Lohmann
University of Rhode Island
401-874-6612
South Ferry Road URI Bay Campus
Narragansett
RI
02882
USA
rlohmann@uri.edu
pointOfContact
Kari Ann St. Laurent
University of Rhode Island
Kari.staurent@noaa.gov
pointOfContact
asNeeded
Dataset Version: 1
Unknown
Site
Depth_Interval
Date
Lat
Lon
Carbon_Fraction
Fm_Measured
Norm_del13C
Fm_Stdev
Fm_Corrected
Fmc_Stdev
continuous-flow AMS system
4-barrel multi-corer
theme
None, User defined
site
depth below seafloor
date
latitude
longitude
organic carbon
No BCO-DMO term
d13C
featureType
BCO-DMO Standard Parameters
Accelerator Mass Spectrometer
Multi Corer
instrument
BCO-DMO Standard Instruments
EN480
EN481
service
Deployment Activity
Amazon Delta
Sierra Leone Rise
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.
Concentrations and source assessment of black carbon across tropical Atlantic air and sediment
https://osprey.bco-dmo.org/project/818636
Concentrations and source assessment of black carbon across tropical Atlantic air and sediment
<p><em>NSF Award Abstract:</em><br />
Black carbon is formed during the incomplete burning of fuels (e.g., the black clouds of smoke emitted by buses and trucks). Black carbon does not degrade easily in the environment and can be transported long distances, even reaching the seafloor. Yet the fluxes of black carbon in the environment are not well known, particularly in the oceans. Rivers are considered the dominant source of black carbon to the oceans. However, recent results suggest that there may be regions of the ocean where the atmospheric delivery of black carbon may be important. This study investigates whether biomass burning (e.g., wildfires) in Africa is a source of black carbon to the tropical Atlantic Ocean. The unique molecular and isotopic properties of black carbon will be used to identify black carbon in the atmosphere, water and sediment in the study region. Sediment, water column and atmospheric particles will be collected during a 3-week research cruise across the tropical Atlantic Ocean. Two different approaches will be used to quantify black carbon in the environment. The research is relevant and timely for our understanding of the carbon cycle, a key component of our ability to forecast climate and its change. The project supports a graduate student and provide opportunities for high school students participating in the SMILE Program (Science and Math Investigative Learning Experiences). This project is jointly funded by the Chemical Oceanography Program and the Established Program to Stimulate Competitive Research (EPSCoR).</p>
<p>Surface sediment samples will be collected at ten sites across the tropical Atlantic Ocean in a region known to be impacted by biomass burning events (wildfires) in Africa. Appropriate locations for sediment sampling will be identified using state-of-the-art ship equipment to ensure a successful coring operation. Once collected, the black carbon and organic carbon fractions of the sediment will be isolated and measured. A range of isotopic and molecular marker approaches will be used to identify the likely source of these carbon fractions. The central hypothesis is that the black carbon residing in the sediment of the tropical Atlantic Ocean is derived from biomass burning and delivered through atmospheric deposition. Carbon derived from recent biomass burning contains C-14 isotopes that indicate 'young' (or recently produced) carbon, while carbon from fossil fuels ('old carbon') has no C-14 due to radioactive decay. To further assess the origin of the black carbon in the region, water column and atmospheric particles will be collected during the research cruise. The origin of the atmospheric black carbon particles (biomass burning or fossil fuel emissions) will be established through a collaboration with colleagues in Sweden. The broader impacts of this research include the engagement of high school students through The SMILE Program (Science and Math Investigative Learning Experiences) at the University of Rhode Island. The project also provides training opportunities for graduate and undergraduate students, with a focus on recruitment of students from under-represented groups.</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>
Tropical Atlantic Black Carbon
largerWorkCitation
project
The Black Carbon Cycle: Budget and Fluxes of Black Carbon in South Atlantic Sediments
https://osprey.bco-dmo.org/project/908361
The Black Carbon Cycle: Budget and Fluxes of Black Carbon in South Atlantic Sediments
<p>NSF abstract:<br />
This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).</p>
<p>In this study, researchers at the University of Rhode Island will attempt to determine the origin and fluxes of black carbon (BC) in marine sediments from the South Atlantic. Black carbon in the atmosphere is a key driver of global climate change; it is second only to CO2 in its contribution to global warming. The proposed work is thus relevant and timely for our understanding of the carbon cycle, a key component of our ability to forecast climate and its change. The major sources of BC on the global scale are fossil fuel and biomass burning, which are both prominent in Africa and South America. Hence, it is proposed to account for soot BC, char and charcoal residing in sediments from the South Atlantic by combining thermal, chemical and petrographic isolation methods.</p>
<p>This project has three main hypotheses: (1) Soot BC constitutes a significant fraction of the total organic carbon in deep sea sediments of the South Atlantic, and dominates total BC in those sediments; (2) Biomass burning is the dominant source of the soot BC present in deep sea sediments of the South Atlantic; and (3) For the South Atlantic, atmospheric deposition of soot BC is as important as riverine inputs.</p>
<p>This study represents a first attempt to account for BC sinks on an Ocean scale. It thus holds promise to make a major step forward towards being able to mass balance sources and sinks of BC. Previous studies suggest that BC reaches the oceans predominantly from riverine sources. In the case of the South Atlantic, the research team hypothesizes that atmospheric transport and deposition is at least as important. The proposed research will compare different BC determination procedures for deep sea sediments, thereby improving our understanding of the different constituents of the BC cycle. Similarly, organic marker molecules are often used for source apportionment. This study will explore if this still holds true for deep sea sediment samples, as preliminary data found discrepancies arising from molecular marker analysis and isotopic analysis. Lastly, accounting for soot BC in deep sea sediments will also aid in identifying more of the uncharacterized sedimentary OC .</p>
<p>Broader Impacts: The results of this work are expected to aid atmospheric and earth system science modelers in refining their atmospheric and oceanic transport models for BC, including its relation to global climate change. The project will enhance infrastructure for research and education by establishing research collaboration between URI and international partners at the University of Bremen, the MPI for Meteorology, Hamburg, and the University of Tuebingen.</p>
Black Carbon Cycle
largerWorkCitation
project
eng; USA
oceans
Amazon Delta; Sierra Leone Rise
-47.4844
-21.2436
4.2828
7.4353
2010-07-17
2010-08-13
From projects that focused on the following 2 locations: 1. Tropical North Atlantic Ocean 2. South Atlantic
0
BCO-DMO catalogue of parameters from Atlantic sediment radiocarbon from mult-corer samples collected in the Amazon Delta and Sierra Leone Rise during R/V Endeavor cruises EN-480 and EN-481 in 2010
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/910792.rdf
Name: Site
Units: unitless
Description: <p>Numerical sediment core name</p>
http://lod.bco-dmo.org/id/dataset-parameter/910793.rdf
Name: Depth_Interval
Units: cenitmeters below seafloor (cmbsf)
Description: <p>sediment depth interval</p>
http://lod.bco-dmo.org/id/dataset-parameter/910794.rdf
Name: Date
Units: unitless
Description: <p>Core date</p>
http://lod.bco-dmo.org/id/dataset-parameter/910795.rdf
Name: Lat
Units: decimal degrees
Description: <p>Core sample location latitude</p>
http://lod.bco-dmo.org/id/dataset-parameter/910796.rdf
Name: Lon
Units: decmial degrees
Description: <p>Core sample location longitude</p>
http://lod.bco-dmo.org/id/dataset-parameter/910797.rdf
Name: Carbon_Fraction
Units: unitless
Description: <p>The fraction of carbon measured (Total Organic Carbon or Black Carbon)</p>
http://lod.bco-dmo.org/id/dataset-parameter/910798.rdf
Name: Fm_Measured
Units: 14C years
Description: <p>The measured 14C fraction modern</p>
http://lod.bco-dmo.org/id/dataset-parameter/910799.rdf
Name: Norm_del13C
Units: per mil (0/00)
Description: <p>The normalized stable carbon isotope ratio</p>
http://lod.bco-dmo.org/id/dataset-parameter/910800.rdf
Name: Fm_Stdev
Units: 14C years
Description: <p>Standard deviation of the 14C fraction modern</p>
http://lod.bco-dmo.org/id/dataset-parameter/910801.rdf
Name: Fm_Corrected
Units: 14C years
Description: <p>The blank corrected 14C fraction modern</p>
http://lod.bco-dmo.org/id/dataset-parameter/910802.rdf
Name: Fmc_Stdev
Units: 14C years
Description: <p>Standard deviation of the blank corrected 14C fraction modern</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
2390
https://darchive.mblwhoilibrary.org/server/api/core/bitstreams/41c54a95-0f14-4f35-9aa7-f7d461f4489f/content
download
https://doi.org/10.26008/1912/bco-dmo.908387.1
download
onLine
dataset
<p>Sediment samples were collected via a 4-barrel multi-corer (R/V Endeavor, segmented into 1-2 cm sections, dried in a drying oven (35°C) and homogenized via mortar and pestle. Sediments were decalcified using 10% hydrochloric acid. Black carbon was isolated using the chemothermal oxidation at 375°C method.<br />
<br />
&nbsp;</p>
<div>Radiocarbon data were analyzed at the National Ocean Sciences Accelerator Mass Spectrometry Facility (NOSAMS) at the Woods Hole Oceanic Institute using the “reconnaissance” method as described by Burke et al., 2010 and McIntyre et al., 2011. The blank-corrected fraction modern is also reported as described by Burke et al., 2010. The AMS is a commissioned continuous-flow AMS system.</div>
<div>&nbsp;</div>
<p>Instruments:&nbsp;<br />
<br />
Both the total organic carbon&nbsp; (~0.10 to 0.35 mgC) and black carbon (~0.15 to 0.80 mgC) samples were combusted into carbon dioxide using a modified elemental analyzer and then converted to graphite using a zinc reduction method before analysis on an Accelerator Mass Spectrometer.<br />
<br />
LOCATION:<br />
Amazon Delta (approximately: 4 N, 47 W; 2400-3500m); Sierra Leone Rise (approximately: 7 N, 20 W; 2800-3800m).</p>
Specified by the Principal Investigator(s)
* Sheet 1 of file "Atlantic Sediment 14C.xlsx" was imported into the BCO-DMO data system.
* * Column names adjusted to conform to BCO-DMO naming conventions designed to support broad re-use by a variety of research tools and scripting languages. [Only numbers, letters, and underscores. Can not start with a number]
* Date format converted to ISO 8601 format.
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
continuous-flow AMS system
continuous-flow AMS system
PI Supplied Instrument Name: continuous-flow AMS system 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/
4-barrel multi-corer
4-barrel multi-corer
PI Supplied Instrument Name: 4-barrel multi-corer PI Supplied Instrument Description:Sediment samples were collected via a 4-barrel multi-corer 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: EN480
EN480
R/V Endeavor
Community Standard Description
International Council for the Exploration of the Sea
R/V Endeavor
vessel
EN480
Rainer Lohmann
University of Rhode Island
Cruise: EN481
EN481
R/V Endeavor
Community Standard Description
International Council for the Exploration of the Sea
R/V Endeavor
vessel
EN481
Rainer Lohmann
University of Rhode Island
R/V Endeavor
Community Standard Description
International Council for the Exploration of the Sea
R/V Endeavor
vessel