Antarctic coastal waters west of the Antarctic Peninsula were sampled during the austral summer of 2018 on cruise LMG18-01. The dataset contains measurements of nitrification rates using 15N-labeled ammonium, urea, and nitrite, alongside direct measurements of dark inorganic carbon fixation and concentrations of nitrogen compounds. The research was conducted by a collaborative project with the Palmer LTER and contributed to understanding nitrogen cycling and bacterioplankton production.
Use Cases
- Estimate urea-derived nitrogen contribution to chemoautotrophy by analyzing 15N oxidation rates from urea.
- Compare chemoautotrophic carbon fixation estimates from 15N oxidation with direct measurements of dark 14C incorporation.
- Analyze spatial patterns of nitrification by correlating process rates with water mass data (surface, winter, circumpolar deep, slope water).
- Investigate relationships between nitrification rates and ancillary Palmer LTER data like bacterioplankton abundance and chlorophyll.
- Model the role of organic nitrogen sources in nitrification using measurements of urea and polyamine concentrations.
Strengths
- Samples collected from four distinct Antarctic water masses, providing vertical profile data.
- Integrates core measurements with ancillary Palmer LTER data for broader ecosystem context.
- Data collection occurred during a dedicated 2018 research cruise (LMG18-01), ensuring field consistency.
Limitations
- Sample size is limited to a single austral summer cruise, restricting temporal generalizability.
- Geographic scope is confined to the continental shelf and slope west of the Antarctic Peninsula.
- Specific row and column counts, data formats, and granular sampling frequencies are not provided.
Provenance
- Source
- Collaborative research project associated with AMD_USAPDC and the Palmer LTER.
- Collection Method
- Field sampling from multiple water masses during a research cruise, with laboratory analysis of isotopic tracers (15N, 14C), chemical concentrations, and qPCR.
- Time Range
- Austral summer of 2018.
- Freshness
- null
- Geography
- Continental shelf and slope west of the Antarctic Peninsula, Southern Ocean.