Stable isotope incubation experiments measured nitrogen, carbon, and silicon cycling within Antarctic sea ice during the 2012 SIPEX 2 voyage. The dataset compares 13C and 14C primary production methods and assesses biogenic silica production and dissolution. Data were collected by the Australian Antarctic Data Centre and last updated in November 2012.
Use Cases
- Compare primary production rates from 13C-assimilation and 14C incubation methods using the intercalibration data.
- Model nitrogen substrate contributions by analyzing uptake rates for NO3- and NH4+ from isotope experiments.
- Estimate biogenic silica production and dissolution dynamics using 30Si isotope measurements from dedicated ice cores.
- Investigate relationships between biogeochemical activity and trace metal availability using data co-located with the Trace Metal site.
Strengths
- Data integrates multiple biogeochemical processes: carbon assimilation, nitrogen uptake, nitrification, and silica cycling.
- Experiments were conducted with clean sampling protocols, especially at the Trace Metal site, to minimize contamination.
- Analyses performed using high-precision instruments: EA-IRMS for C/N and HR-ICPMS for silicon.
Limitations
- Sample size is limited to three dedicated ice cores and incubation experiments from a single expedition.
- Geographic coverage is restricted to specific sites visited during the SIPEX 2 voyage in the Antarctic.
- Data is over a decade old, with no updates since 2012.
Provenance
- Source
- Australian Antarctic Data Centre (AU_AADC).
- Collection Method
- In-situ incubation experiments on sea ice, with samples analyzed via EA-IRMS and HR-ICPMS.
- Time Range
- Data collected during the SIPEX 2 expedition, circa 2012.
- Freshness
- Last updated in 2012.
- Geography
- Antarctic sea ice, specifically sites near or on the Trace Metal clean site and a Biosite.