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Chlorin concentrations measured in sediment samples collected during the IN2017-V01 voyage of the RV Investigator

Created 23/06/2025

Updated 23/06/2025

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Sediment cores were collected from the East Antarctic margin, aboard the Australian Marine National Facility R/V Investigator, during the IN2017_V01 voyage from January 14th to March 5th 2017 (Armand et al., 2018). This marine geoscience expedition, named the “Sabrina Sea Floor Survey”, focused notably on studying the interactions of the Totten Glacier with the Southern Ocean through multiple glacial cycles. The cores were collected using a multi-corer (MC) and a Kasten corer (KC). The MC were sliced every centimetre, wrapped up in plastic bags, and stored in the fridge. The KC was sub-sampled using a u-channel; and sliced every centimetre once back the home laboratory (IMAS, UTAS, Hobart, Australia). About 200 mg of sediment were dried in an oven at 40°C, ground using a pestle and a mortar and weighed into centrifuge tube. Chlorin (degradation products of chlorophyll-a) was extracted by sonication with acetone (90%; HPLC grade) following Schubert et al., (2005). Sample fluorescence was measured in triplicate by spectrofluorometry, at the excitation wavelength of 428 nm and the emission wavelength of 671 nm. The chlorin concentration was measured as followed: [chlorin] = F/C x 0.000015 / (S/1000) Where [chlorin] is the chlorin concentration in µg/g; F is the averaged fluorimetry intensity; C is the spectrofluorometer constant 1287.9; and S is the sediment weight in mg. References Armand, L. K., O’Brien, P. E., Armbrecht, L., Baker, H., Caburlotto, A., Connell, T., … Young, A. (2018). Interactions of the Totten Glacier with the Southern Ocean through multiple glacial cycles (IN2017-V01): Post-survey report. ANU Research Publications, (March). https://doi.org/http://dx.doi.org/10.4225/13/5acea64c48693 Schubert, C. J., Niggemann, J., Klockgether, G., and Ferdelman, T. G. (2005). Chlorin Index: A new parameter for organic matter freshness in sediments. Geochemistry, Geophysics, Geosystems, 6(3). https://doi.org/10.1029/2004GC000837

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Field Value
Title Chlorin concentrations measured in sediment samples collected during the IN2017-V01 voyage of the RV Investigator
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/e16c7060-10b0-4bf9-ab21-3c780f212af1
Contact Point
Australian Ocean Data Network
metadata@aad.gov.au
Reference Period 14/01/2017 - 31/12/2021
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        115.0,
        -65.0
      ],
      [
        120.0,
        -65.0
      ],
      [
        120.0,
        -64.0
      ],
      [
        115.0,
        -64.0
      ],
      [
        115.0,
        -65.0
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Australian Oceans Data Network

Data Source

This dataset was originally found on Australian Oceans Data Network "Chlorin concentrations measured in sediment samples collected during the IN2017-V01 voyage of the RV Investigator". Please visit the source to access the original metadata of the dataset:
https://catalogue.aodn.org.au/geonetwork/srv/eng/csw/dataset/chlorin-concentrations-measured-in-sediment-samples-collected-during-the-in2017-v01-voyage-of-t