Antarctic Sea Surface Dissolved Gas Measurements from CEAMARC Voyage

Continuous underway measurements of dissolved gases (CO2, O2, Argon, Nitrogen) in sea surface water at 7 meters depth. Data was collected via Electron Impact Mass Spectrometry on the CEAMARC cruise of the Aurora Australis during the 2007-2008 summer season. The dataset is organized into daily files with columns for cycle, date, time, relative time, and ion mass readings.

Use Cases

• Analyze temporal patterns of sea surface CO2 partial pressure using the 'RelTime[s]' and ion mass columns to study ocean carbon uptake.
• Correlate dissolved O2 concentrations (from specific ion mass columns) with other oceanographic parameters to investigate biological productivity.
• Model gas solubility and air-sea flux by combining argon and nitrogen ion mass readings with concurrent sea surface temperature and salinity data.
• Validate and calibrate regional biogeochemical models using high-frequency in-situ gas measurements from the 'Date' and 'Time' columns across the cruise track.

Strengths

• Continuous high-frequency measurements provide detailed temporal resolution of gas concentrations.
• Data covers a specific research voyage in the biologically significant Antarctic region during summer.

Limitations

• The exact number of rows, spatial coverage, and data completeness per file are unknown.
• Data is from a single cruise in 2007-2008, limiting temporal generalizability and may be affected by seasonal bias.
• Specific calibration procedures and error margins for the quadrupole mass spectrometry readings are not detailed.

Provenance

Source

AU_AADC (Australian Antarctic Data Centre), collected on the CEAMARC voyage of the Aurora Australis.

Collection Method

Continuous underway measurements using Electron Impact Mass Spectrometry (EIMS) at 7 meters depth.

Time Range

2007-2008 summer season.

Freshness

Data collection ended on 2008-01-27; it is a static historical dataset.

Geography

Southern Ocean, along the track of the CEAMARC cruise of the Aurora Australis.