All scientific data collected by the Australian Antarctic program (AAp) are eventually described in the Catalogue of Australian Antarctic and Subantarctic Metadata (CAASM). CAASM can be used to search through AAp data descriptions, and it also provides links to access publicly available datasets, which can either be immediately downloaded or obtained from the Australian Antarctic Data Centre (AADC).

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Citation
Noble, T.L., Tooze, S. (2019, updated 2019) Iceberg rafted debris flux on the Sabrina continental slope Australian Antarctic Data Centre - doi:10.26179/5d5df0f2bb683
Title
Iceberg rafted debris flux on the Sabrina continental slope
Data Centre
Australian Antarctic Data Centre, Australia
DOI
doi:10.26179/5d5df0f2bb683
Created Date
2019-08-21
Revision Date
2019-08-22
Parent record
None

Description

Ice-rafted debris is characterised by coarse material with typically angular grains, transported within icebergs and deposted in the ocean as the icebergs melt. This iceberg rafted debris (IBRD) flux data submitted here, was calculated by quantifying the coarse sand fraction (CSF) as a percentage of the bulk sample (weight of grains in the 250 micron to 2 mm size fraction), the dry bulk density (DBD) and the linear sedimentation rate (LSR) (following Krissek et al., 1995, Patterson et al., 2014).

The CSF (250μm-2mm) was acquired from samples at 10cm intervals along KC14 by wet-sieving approximately 20g of sediment per sample. Authigenic grains and microfossils were removed from the samples under a microscope. The remaining material was weighed on a microbalance and calculated as a percentage of the bulk sample. The DBD was calculated by subsampling approximately 8cm3 of sediment from the same depth intervals and dividing the dry weight of the sediment by the volume of the subsampler. The LSR was approximated by dividing the distance (cm) between the calibrated bulk carbon ages by the difference in time (kyr). The IBRD flux was then quantified using the above equation for each depth interval.

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Purpose

This data set allows reconstruction of past ice sheet variability and the geological and chemical characteristics can be used to determine the subglacial geology beneath the ice sheet.

Quality

Note that the magnitude of the flux could change as the age model, which is used to calculate the sedimentation rate, is updated or improved.

Access

These data are publicly available for download from the provided URL.

Temporal Coverages

Spatial Coverages

Data Resolution

Vertical Resolution:
0.1 Metre(s)

Science Keywords

Additional Keywords

  • SEDIMENTOLOGY
  • ICEBERG RAFTED DEBRIS
  • RV INVESTIGATOR

Locations

  • CONTINENT > ANTARCTICA
  • OCEAN > SOUTHERN OCEAN > SABRINA CONTINENTAL SLOPE
  • GEOGRAPHIC REGION > POLAR

Platforms

  • SHIPS

Instruments

  • SEDIMENT CORERS

Researchers

  • noble, taryn (INVESTIGATOR,TECHNICAL CONTACT,DIF AUTHOR)
  • tooze, sian (INVESTIGATOR)

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_4419_KC14_IBRDFlux when using these data.

Creative Commons License