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

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

Identification info

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

Date (Publication): 2023-04-03

Edition: 1

Citation identifier

Dataset DOI

Title: Information and documentation - Digital object identifier system

Date (Publication): 2012-04-23

Citation identifier: ISO 26324:2012

Citation identifier: doi:10.26179/6as6-wk12

Originator

Creac'h, L. and Noble, T.L.

Publisher

Australian Antarctic Data Centre

Principal investigator

CREAC'H, LAYLA

Institute for Marine and Antarctic Studies

20 Castray Esplanade, Battery Point

Hobart

TAS

7004

Australia

Principal investigator

NOBLE, TARYN L

Institute of Marine and Antarctic Studies

20 Castray Esplanade

Hobart

Tas

7004

Australia

Collaborator

CREAC'H, LAYLA

Institute for Marine and Antarctic Studies

20 Castray Esplanade, Battery Point

Hobart

TAS

7004

Australia

Name: CAASM Metadata

Other citation details: Unreleased data

Website: https://data.aad.gov.au/metadata/records/AAS_4419_Chlorin_sediment

Purpose: These data were collected to reconstruct paleo-productivity variations.

Status: Completed

Custodian

AU/AADC > Australian Antarctic Data Centre, Australia - AADC, DATA OFFICER (DATA CENTER CONTACT)

Australian Antarctic Division

203 Channel Highway

Kingston

Tasmania

7050

Australia

+61 3 6232 3244

+61 3 6232 3351 (facsimile)

Topic category

Oceans

Extent