Seawater samples were collected during the 2006 BROKE-West voyage of the Aurora Australis to measure particulate silicon concentrations. Samples were taken at 6 depths within the top 200 meters of the water column across 7 southward CTD transects. The data was produced by the Australian Antarctic Data Centre (AU_AADC) as part of ASAC projects 2655 and 2679.
Use Cases
- Analyze particulate_silicon_concentration variation with sampling_depth and location across transects.
- Model the relationship between particulate silicon and other CTD cast parameters like conductivity, temperature, and depth.
- Investigate the vertical profile of biogenic silica by comparing samples from the 6 specified depths within the top 200m.
- Correlate filter_type (polycarbonate vs. fibreglass) with analytical methods and resulting chemical measurements.
Strengths
- Samples collected at 6 standardized depths within the top 200 meters, enabling vertical profile analysis.
- Data originates from 7 completed CTD transects on a dedicated Antarctic research voyage.
Limitations
- Sample size is limited to collections from every 2nd CTD cast, not a continuous series.
- Key metadata like exact row count, column names, and measurement precision are unknown.
Provenance
- Source
- Australian Antarctic Data Centre (AU_AADC) via NASA Earthdata.
- Collection Method
- Seawater collected via Niskin bottles on CTD casts, filtered, and analyzed for particulate silicon using an onboard nutrient autoanalyzer.
- Time Range
- 2006 (BROKE-West voyage).
- Freshness
- null
- Geography
- Southern Ocean, Antarctic region along the BROKE-West voyage transects.