Southern Ocean Foraminifera Carbon Isotope Measurements for Suess Effect Analysis

Carbon isotopic composition (d13C) data is measured for three planktonic foraminifera species from Southern Ocean sediment traps. The dataset enables the determination of disequilibrium effects and provides estimates of the modern oceanic Suess effect through comparison with core top samples.

Use Cases

• Analyze latitudinal trends in foraminiferal d13C disequilibrium across Subtropical to Polar Frontal environments.
• Model the relationship between temperature and d13C disequilibrium for Globigerina bulloides using field-derived data.
• Investigate the correlation between corrected G. bulloides d13C and seasonal nutrient changes at each sediment trap site.
• Quantify the modern depletion in d13C (Suess effect) by comparing flux-weighted sediment trap values with nearby core top samples.

Strengths

• Data includes three distinct foraminifera species: Globigerina bulloides, Globorotalia inflata, and Neogloboquadrina pachyderma (s.).
• Measurements cover a latitudinal gradient from Subtropical to Polar Frontal environments in the western Pacific/Southern Australia sector.
• Enables direct comparison between seasonal foraminiferal d13C and estimated d13C of dissolved inorganic carbon (DIC).

Limitations

• Specific row count, column structure, and file size are unknown, complicating assessment of analytical scope.
• Primary data format is HTML, which may require significant parsing and extraction to obtain structured, machine-readable data.
• Geographic coverage is limited to the specific Southern Ocean sector studied, not a global survey.

Provenance

Source

Geoscience Australia Data

Collection Method

Measurements from sediment traps collecting the annual flux of foraminifera.

Time Range

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Freshness

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Geography

Southern Ocean, western Pacific/Southern Australia sector, from Subtropical to Polar Frontal environments.