Oceanographic data from 97 CTD vertical profiles and over 800 water samples collected during the Aurora Australis cruise au97_9806 in March 1998. The dataset includes measurements for salinity, dissolved oxygen, nutrients, carbon isotopes, and biological parameters. It was collected by the Australian Antarctic Data Centre in the Subantarctic Zone south of Tasmania.
Use Cases
- Analyze relationships between temperature, salinity, and sigma-T to characterize water mass structure in the Subantarctic Zone.
- Model dissolved oxygen concentration as a function of depth (pressure), temperature, and fluorescence to study biological productivity.
- Investigate correlations between nutrient levels (implied by phosphate, nitrate+nitrite columns) and biological indicators like pigments or species counts.
- Use geopotential anomaly and position data to study dynamic ocean topography and current systems.
- Study temporal changes in water properties using the date, start time, and bottom time fields across the 97 stations.
Strengths
- 97 CTD vertical profiles provide detailed water column structure.
- Over 800 water samples enable analysis of numerous chemical and biological parameters.
Limitations
- Data is from a single cruise in March 1998, limiting temporal and seasonal analysis.
- Spatial coverage is restricted to the Subantarctic Zone south of Tasmania.
- Sample size for specific analytes like arsenic or copper is unknown and may be small.
Provenance
- Source
- Australian Antarctic Data Centre (AU_AADC) via NASA Earthdata.
- Collection Method
- Ship-based measurements using a CTD and a 24-bottle rosette sampler for water collection; sediment trap moorings deployed and recovered.
- Time Range
- March 1998.
- Freshness
- null
- Geography
- Subantarctic Zone of the Southern Ocean, south of Tasmania.