South Tasman Rise Sediment Core Records of Deep Water Circulation Over 160,000 Years

Sediment cores from the South Tasman Rise in the southwest Pacific sector of the Southern Ocean preserve records covering the last 160,000 years. The dataset contains benthic foraminiferal δ13C values used to reconstruct deep-water circulation, with chronology controlled by calibrated radiocarbon dates and δ18O ties to SPECMAP. This record is provided by Parks Australia to highlight research relevant to Australian Marine Parks, with the original publication copyright held by John Wiley & Sons, Ltd.

Use Cases

• Reconstructing glacial-interglacial deep-water circulation changes based on benthic foraminiferal δ13C records.
• Comparing Southern Ocean deep-water mass evolution with equatorial Pacific and Atlantic records based on the described δ13C time series.
• Investigating the continuous production of northern source deep water over the past 160,000 years based on described δ13C gradients.
• Calibrating sediment core chronologies using the described accelerator mass spectrometry radiocarbon dates and benthic foraminiferal δ18O.

Strengths

• Covers a long temporal span of 160,000 years.
• Chronology is controlled by calibrated accelerator mass spectrometry radiocarbon dates and benthic foraminiferal δ18O tied to SPECMAP.
• Records are from sites unlikely to be affected by variations in productivity, as stated in the description.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data freshness should be verified; the last metadata update is 2026-07-15.

Provenance

Source

Parks Australia, referencing a source publication (John Wiley & Sons, Ltd.).

Collection Method

Analysis of sediment cores MD972106 and GC34 from the South Tasman Rise.

Time Range

Last 160,000 years.

Freshness

Last updated 2026-07-15 03:08:06.238750; freshness should be verified

Geography

South Tasman Rise, Southern Ocean (southwest Pacific sector).