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Citation
Swadling, K. and Davies, D. (2019) Nitrogen and carbon isotopes of particulate organic matter during the K-Axis voyage of the Aurora Australis, 2016, Ver. 1, Australian Antarctic Data Centre - doi:10.4225/15/5a82301b6e244, Accessed: 2021-05-06
Title
Nitrogen and carbon isotopes of particulate organic matter during the K-Axis voyage of the Aurora Australis, 2016
Data Centre
Australian Antarctic Data Centre, Australia
DOI
doi:10.4225/15/5a82301b6e244
Created Date
2018-01-12
Revision Date
2019-10-16
Parent record
None

Description

Water samples were collected from the seawater line on the Aurora Australis during the K-Axis voyage. They were filtered so that two fractions of each sample were collected: a fraction that was between 1.2 and 210 um and a fraction that was between 210 and 1000 um. A 47 mm diameter 1000 um mesh was placed upstream of all samples, and this prevented larger particles (e.g. zooplankton) from entering the samples. The underway water was taken from the pCO2 rig at 1.4 to 1.5 atmospheres.

All samples were collected on 25 mm diameter 1.2um Sterlitech silver membrane filters. The greater than 210 samples were collected on mesh and refiltered onto silver filters. The filters were stored frozen until they were processed in Hobart. Subsamples of the filters were analysed at the Central Science Laboratories, University of Tasmania to determine elemental N and C. The remainder of the filters were analysed by ANSTO (NSW) to determine delta15N and delta13C.

Volumes are in litres, and the values for the nitrogen isotopes are presented as ratios.

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Purpose

The samples were primarily collected to help establish an isotopic baseline for understanding trophic positions of zooplankton and fish. The data (particularly delta 15N) have also been used for interpreting iron dynamics in the water across the Kerguelen Plateau.

Quality

In some cases, the amount of sample was very small - notes about the quality of each measurement are made on the spreadsheet.

Access

These data are publicly available for download from the provided URL. It is requested that potential users contact the data custodian.

Temporal Coverages

Spatial Coverages

Science Keywords

Additional Keywords

  • K-AXIS
  • KERGUELEN-AXIS

Locations

  • GEOGRAPHIC REGION > POLAR
  • OCEAN > SOUTHERN OCEAN > KERGUELEN PLATEAU
  • OCEAN > SOUTHERN OCEAN > PRINCESS ELIZABETH TROUGH
  • CONTINENT > ANTARCTICA

Platforms

  • R/V Aurora Australis

Instruments

  • Inductively Coupled Plasma Mass Spectrometer
  • Carbon, Hydrogen, Nitrogen Elemental Analyzers

Researchers

  • swadling, kerrie (INVESTIGATOR)
  • davies, diana (TECHNICAL CONTACT)

Use Constraints

This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/).

Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_4331_KAxis_POM_isotopes when using these data.

Creative Commons License