IMAS Metadata Catalogue
Total 234Th and 238U data in East Antarctic polynyas
Thorium-234 samples were collected to determine the particulate organic carbon (POC) export fluxes in two East Antarctica polynyas, Dalton and Mertz. The samples were collected along the water column using the CTD deployed at several stations. The seawater Th-234 data was used in combination with POC:234Th ratios obtained from particulate samples collected using in situ pumps in order to derive the POC fluxes.
This record describes Th-234 and U-238_data: sample ID, depth, CTD file, station ID, latitude and longitude, Th-234 concentration and its uncertainty, U-238 concentration and its uncertainty.
See linked record for associated POC data from Aurora Australis Voyage 2 2016/17.
Simple
Identification info
- Date (Creation)
- 2021-11-03
- Date (Publication)
- 2021-11-03
Collaborator
Centre for Marine Ecosystems Research (CMER), School of Natural Sciences, Edith Cowan University (ECU) - Puigcorbé, Viena
Edith Cowan University
270 Joondalup Drive
Joondalup
Western Australia
6027
Australia
- Credit
- Aurora Australis Voyage 2 2016/17
- Credit
- Edith Cowan University
- Credit
- V. Puigcorbé was supported by Edith Cowan University through an Early Career Researcher Grant (G1003456) and an ECU-Collaboration Enhancement Scheme grant
- Status
- Completed
Principal investigator
- Topic category
-
- Oceans
Extent
N
S
E
W
))
Temporal extent
- Time period
- 2016-12-08 2017-01-21
- Maintenance and update frequency
- Not planned
- NASA/GCMD Keywords, Version 8.5
- Keywords (Theme)
-
- Thorium-234
Resource constraints
- Classification
- Unclassified
Resource constraints
- Use limitation
- The data described in this record are the intellectual property of the University of Tasmania through the Institute for Marine and Antarctic Studies.
Resource constraints
- Linkage
-
http://i.creativecommons.org/l/by/4.0/88x31.png
License Graphic
- Title
- Creative Commons Attribution 4.0 International License
- Website
-
http://creativecommons.org/licenses/by/4.0/
License Text
- Other constraints
- Cite data as: Puigcorbé (2021). Total 234Th and 238U data in East Antarctic polynyas [dataset] Edith Cowan University. Accessed from Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) at https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/5aaa21bb-d729-415f-9469-d54ed75f9ed6
- Language
- English
- Character encoding
- UTF8
- Supplemental Information
- Benitez-Nelson, C. R., K. O. Buesseler, M. Rutgers van der Loeff, J. Andrews, L. Ball, G. Crossin and M. A. Charette (2001). Testing a new small-volume technique for determining 234Th in seawater. Journal of Radioanalytical and Nuclear Chemistry 248: 795-799. Clevenger, S. J., C. R Benitez-Nelson, J. Drysdale, S. Pike, V. Puigcorbé and K. O. Buesseler (2021). Review of the analysis of 234Th in small volume (2-4 L) seawater samples: improvements and recommendations. Journal of Radioanalytical and Nuclear Chemistry 329, 1-13. Owens, S. A., K. O. Buesseler and K. W. W. Sims (2011). Re-evaluating the 238U-salinity relationship in seawater: Implications for the 238U-234Th disequilibrium method. Marine Chemistry 127: 31-39.
Content Information
- Content type
- Physical measurement
Identifier
Identifier
- Identifier
- http://vocab.nerc.ac.uk/collection/P06/current/UECA
- Name
- Siemens per metre
Identifier
- Identifier
- http://vocab.aodn.org.au/def/unitsofmeasure/entity/481
- Name
- Practical Salinity Unit
- Name
-
Photosynthetically active radiation (PAR)
- Identifier
- http://vocab.aodn.org.au/def/unitsofmeasure/entity/585
- Name
- Micromoles per second per square metre
- Identifier
- http://vocab.nerc.ac.uk/collection/P06/current/UPDB
- Name
- Decibars
Identifier
- Name
- Moles per litre
Identifier
- Name
- Moles per litre
Identifier
- Code
- C:N ratio
- Name
- ratio
- Identifier
- http://vocab.nerc.ac.uk/collection/P06/current/UPOX
- Name
- Micromoles per litre
Distribution Information
Resource lineage
- Statement
- A total of 8 CTD (conductivity-temperature-depth, SeaBird 704, SeaBird Inc., Bellevue, USA) casts were undertaken within the Dalton (n = 4), Mertz (n = 4) polynyas. Seawater samples to measure 234Th were collected from Niskin bottles triggered at various depths during the CTD cast. Between 6 and 16 depths down to 800 m. Seawater samples were treated following the manganese oxide precipitation technique (Benitez-Nelson et al. 2001, Clevenger et al. 2021). Samples were prepared and counted on board using a low-level background beta counter (RISØ, Denmark). Second counting was conducted >6 months later and chemical recoveries were obtained by ICP-MS at the Alfred Wegener Institute (Germany). 238U concentrations were derived from salinity values following the U-S relationship from Owens et al. 2011.
- Hierarchy level
- Dataset
- Hierarchy level
- Dataset
Platform
Identifier
- Code
- research vessel
Instrument
Identifier
- Code
- CTD
- Hierarchy level
- Dataset
Instrument
Identifier
- Code
- CTD
- Hierarchy level
- Dataset
Instrument
- Identifier
-
Niskin bottle deployed from CTD
Metadata
- Metadata identifier
-
urn:uuid/5aaa21bb-d729-415f-9469-d54ed75f9ed6
- Language
- English
- Character encoding
- UTF8
Publisher
- Parent metadata
Type of resource
- Resource scope
- Dataset
- Metadata linkage
-
https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/5aaa21bb-d729-415f-9469-d54ed75f9ed6
Point of truth URL of this metadata record
- Date info (Creation)
- 2021-11-03T21:59:12
- Date info (Revision)
- 2021-03-29T21:59:12
Metadata standard
- Title
- ISO 19115-3:2018
Overviews
Spatial extent
N
S
E
W
Provided by
Associated resources
Not available