Southern Ocean Foraminifera Oxygen Isotope Seasonality from Five Sediment Traps

Geoscience Australia Data provides oxygen isotope (d18O) records from three species of planktonic foraminifera collected by five sediment traps moored in the Southern Ocean and Southwest Pacific. The dataset captures seasonal flux patterns and isotopic values across a latitudinal gradient from subtropical to polar frontal environments. The analysis compares foraminiferal records to predicted calcite d18O equations, with findings on species habitat depth and carbonate chemistry implications.

Use Cases

• Calibrating paleotemperature equations based on the comparison of foraminiferal d18O to predicted calcite values.
• Modeling seasonal production cycles of planktonic species based on described flux patterns (e.g., spring peak for G. bulloides).
• Investigating the relationship between carbonate ion concentration and isotopic offsets in foraminiferal calcite.
• Reconstructing past surface ocean habitats by analyzing the seasonal range in d18O values for near-surface dwelling species.

Strengths

• Data is derived from five sediment traps providing a latitudinal transect from subtropical to polar frontal zones.
• Analysis includes three distinct foraminifera species (Globigerina bulloides, Globorotalia inflata, Neogloboquadrina pachyderma (s.)) enabling species-specific comparisons.
• The study provides a direct comparison between sediment trap flux-weighted isotopic values and nearby surface sediment composition.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and dataset size are unknown, which may limit suitability assessment.
• Description metadata is limited; actual data quality and completeness require manual inspection after download.

Provenance

Source

Geoscience Australia Data

Collection Method

Analysis of oxygen isotopic records from foraminifera collected by sediment traps.

Freshness

Last updated 2026-05-14 09:38:38.359118; freshness should be verified.

Geography

Southern Ocean and Southwest Pacific, from subtropical to polar frontal environments.