Seasonal oxygen isotope records from 5 sediment traps moored across the Southern Ocean and Southwest Pacific, from Subtropical to Polar Frontal environments. The Australian Ocean Data Network provides this analysis of Globigerina bulloides, Globorotalia inflata, and Neogloboquadrina pachyderma (s.) species, comparing foraminiferal d18O to predicted calcite values. The dataset was last updated in April 2026.
Use Cases
- Calibrating paleotemperature equations by comparing foraminiferal d18O records to predicted d18O of calcite from Epstein et al. (1953) and Kim and O'Neil (1997) models.
- Reconstructing seasonal surface ocean conditions by analyzing the seasonal range in d18O values for Globigerina bulloides and Neogloboquadrina pachyderma (s.) across multiple latitudes.
- Inferring foraminiferal habitat depth by comparing d18O offsets between species, such as the ~50 m depth signal suggested for Globorotalia inflata.
- Assessing the preservation of seasonal signals in sediment archives by comparing flux-weighted isotopic values from traps to isotopic composition of nearby surface sediments.
- Investigating carbonate chemistry effects by testing correlations between d18O offsets for G. bulloides and carbonate ion concentration [CO32-].
Strengths
- First analysis of seasonal foraminiferal d18O records from Subtropical to Polar Frontal latitudes in the Southern Ocean.
- Direct comparison of isotopic data from 3 distinct planktonic foraminifera species: Globigerina bulloides, Globorotalia inflata, and Neogloboquadrina pachyderma (s.).
- Data spans 5 distinct sediment trap locations, providing a latitudinal gradient from ~51°S into higher latitudes.
Limitations
- Specific row count, sample size, and temporal resolution per trap are unknown.
- Geographic coverage is limited to 5 specific mooring sites in the Southern Ocean and Southwest Pacific.
- Data is presented in HTML format, which may require extraction and parsing for quantitative analysis.
Provenance
- Source
- Australian Ocean Data Network
- Collection Method
- Oxygen isotopic analysis of foraminifera collected from 5 sediment traps.
- Time Range
- Seasonal coverage (specific years unknown).
- Freshness
- null
- Geography
- Southern Ocean and Southwest Pacific, from Subtropical to Polar Frontal zones.