Data

Quantifying the isotopic composition of oxygen and carbon through time in the core BAR 9403, located off the coast of Sumatra

Australian Ocean Data Network
Spooner, Michelle ; De Deckker, Patrick
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/375368a0-04e4-11dc-b5d9-00188b4c0af8&rft.title=Quantifying the isotopic composition of oxygen and carbon through time in the core BAR 9403, located off the coast of Sumatra&rft.identifier=https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/375368a0-04e4-11dc-b5d9-00188b4c0af8&rft.description=This short core obtained off Sumatra (BAR9403, 5.82 S, 104.0316 E) records the palaeoceanography from the Last Glacial Maximum (LGM) to the present day. The lightest 18O value (-2.99ppt) is recorded during the Holocene (~5cm depth) while the LGM (~125cm depth) is positioned at the heaviest 18O value of -0.59ppt. Once the estimated ice volume effect has been accounted for, this still leaves a substantial difference in 18O which must be accounted for through significant changes in sea-surface temperature (SST) or salinity. The 13C record ranges from a minimum at approximately 8500 yrs BP of 0.16ppt to a maximum value of 1.31ppt during MIS 3.Maintenance and Update Frequency: notPlannedStatement: Samples were collected using a piston core. Each sample was wet sieved through 63µm mesh. ~15 Gs. ruber were then picked from the bulk sample, approx. 250µm in size before being cleaned. Calculations of 13C and 18O at various depths were made by the Finnigan MAT 251 Mass Spectrometer at the Research School of Earth Sciences, ANU.Statement: Mass spectrometer was run concurrently with international standards NBS-19 and NBS-18, and has an analytical error of ±0.08 d18O per mil. and ±0.05 13C per mil. None of the results have been amended to account for the ice volume effect on the foraminifera during the LGM. This dataset presents 18O values every 5cm of the core from the sediment surface down to 275cm. Values for 13C are almost as complete, with data missing at 200cm, 260cm, 265cm and 275cm down into the core. Parameters: Core depth (cm), oxygen-18 Gs.ruber (parts per thousand), carbon-13 Gs.ruber (parts per thousand).&rft.creator=Spooner, Michelle &rft.creator=De Deckker, Patrick &rft.date=2007&rft.coverage=104.01188,-5.79905 104.06901,-5.79973 104.06143,-5.84695 104.01118,-5.84697 104.01188,-5.79905&rft.coverage=westlimit=104; southlimit=-6; eastlimit=104.5; northlimit=-5.5&rft.coverage=westlimit=104; southlimit=-6; eastlimit=104.5; northlimit=-5.5&rft.coverage=uplimit=2034; downlimit=2034&rft.coverage=uplimit=2034; downlimit=2034&rft_rights= http://creativecommons.org/licenses/by/2.5/au/&rft_rights=http://i.creativecommons.org/l/by/2.5/au/88x31.png&rft_rights=WWW:LINK-1.0-http--related&rft_rights=License Graphic&rft_rights=Creative Commons Attribution 2.5 Australia License&rft_rights=http://creativecommons.org/international/au/&rft_rights=WWW:LINK-1.0-http--related&rft_rights=WWW:LINK-1.0-http--related&rft_rights=License Text&rft_rights=The citation in a list of references is: citation author name/s (year metadata published), metadata title. Citation author organisation/s. File identifier and Data accessed at (add http link).&rft_rights=Creative Commons Attribution 2.5 Australia License http://creativecommons.org/licenses/by/2.5/au&rft_subject=environment&rft_subject=ISOTOPES&rft_subject=EARTH SCIENCE&rft_subject=PALEOCLIMATE&rft_subject=OCEAN/LAKE RECORDS&rft_subject=Isotopic Composition&rft_subject=Sumatra&rft_subject=core_depth&rft_subject=amount_of_oxygen-18_isotope_ga._bulloides&rft_subject=amount_of_carbon-13_isotope_ga._bulloides&rft.type=dataset&rft.language=English Access the data
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Brief description

This short core obtained off Sumatra (BAR9403, 5.82 S, 104.0316 E) records the palaeoceanography from the Last Glacial Maximum (LGM) to the present day. The lightest 18O value (-2.99ppt) is recorded during the Holocene (~5cm depth) while the LGM (~125cm depth) is positioned at the heaviest 18O value of -0.59ppt. Once the estimated ice volume effect has been accounted for, this still leaves a substantial difference in 18O which must be accounted for through significant changes in sea-surface temperature (SST) or salinity. The 13C record ranges from a minimum at approximately 8500 yrs BP of 0.16ppt to a maximum value of 1.31ppt during MIS 3.

Lineage

Maintenance and Update Frequency: notPlanned
Statement: Samples were collected using a piston core. Each sample was wet sieved through 63µm mesh. ~15 Gs. ruber were then picked from the bulk sample, approx. 250µm in size before being cleaned. Calculations of 13C and 18O at various depths were made by the Finnigan MAT 251 Mass Spectrometer at the Research School of Earth Sciences, ANU.
Statement: Mass spectrometer was run concurrently with international standards NBS-19 and NBS-18, and has an analytical error of ±0.08 d18O per mil. and ±0.05 13C per mil. None of the results have been amended to account for the ice volume effect on the foraminifera during the LGM. This dataset presents 18O values every 5cm of the core from the sediment surface down to 275cm. Values for 13C are almost as complete, with data missing at 200cm, 260cm, 265cm and 275cm down into the core. Parameters: Core depth (cm), oxygen-18 Gs.ruber (parts per thousand), carbon-13 Gs.ruber (parts per thousand).

Notes

Credit
The Australian National University (ANU)
Credit
Funded by The National Oceans Office (NOO)
Credit
Funded by The Australian Research Council (ARC)
Credit
Funded by French Polar Institute
Credit
Funded by The Australian Institute of Nuclear Science Engineering (AINSE)
Credit
Funded by The Murray Darling Basin Commission
Purpose
The chemical composition of calcareous shell holds clues to the chemical and physical state of the ambient seawater and is useful in reconstructing properties of ancient marine environments

Issued: 21 03 2007

Data time period: 1994 to 1994

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104.01188,-5.79905 104.06901,-5.79973 104.06143,-5.84695 104.01118,-5.84697 104.01188,-5.79905

104.040095,-5.82301

104.5,-5.5 104.5,-6 104,-6 104,-5.5 104.5,-5.5

104.25,-5.75

text: westlimit=104; southlimit=-6; eastlimit=104.5; northlimit=-5.5

text: uplimit=2034; downlimit=2034

Subjects
EARTH SCIENCE | Isotopes | Isotopic Composition | OCEAN/LAKE RECORDS | PALEOCLIMATE | Sumatra | amount_of_carbon-13_isotope_ga._bulloides | amount_of_oxygen-18_isotope_ga._bulloides | core_depth | environment |

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Other Information
(ANU_Spooner_BAR9403_1_data.xls)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/375368a0-04e4-11dc-b5d9-00188b4c0af8/attachments/ANU_Spooner_BAR9403_1_data.xls

global : 63899a20-07f0-11dc-92a7-00188b4c0af8

Identifiers
  • global : 375368a0-04e4-11dc-b5d9-00188b4c0af8
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