Southern Ocean Organosulfur and Halocarbon Measurements from 1993 WOCE Cruise

586 discrete chemical measurements were collected during the Discovery 200 research cruise in February and March 1993. The dataset includes concentrations of dimethyl sulphide (DMS), dimethylsulphoniopropionate (DMSP), tetrachloromethane, carbon dioxide, and methyl iodide from the Indian and Southern Ocean. Measurements were made by scientists including Brian King, J. Robertson, Thomas Haine, and Sue Turner as part of the World Ocean Circulation Experiment.

Use Cases

• Modeling DMS sea-air flux using dissolved DMS concentration and geospatial coordinates to estimate climate-relevant aerosol precursors.
• Analyzing correlations between particulate DMSP concentration and oceanic carbon dioxide measurements to study biological production.
• Investigating halocarbon distributions by mapping tetrachloromethane and methyl iodide concentrations against latitude and longitude.
• Calibrating remote sensing algorithms for ocean surface chemistry using in-situ DMS and DMSP concentration data.
• Studying temporal variability of carbon dioxide by comparing oceanic and atmospheric measurements collected during the cruise period.

Strengths

• Includes 586 specific chemical measurements: 101 DMS, 102 dissolved DMSP, 108 particulate DMSP, and 275 tetrachloromethane records.
• Precise temporal coverage from February 6 to March 18, 1993.
• Clear spatial coverage defined by latitude +41S to +65S and longitude +17E to +85E.

Limitations

• Sample size is limited to a single cruise over 41 days, lacking seasonal or multi-year context.
• Unknown row count and column structure for the full dataset, including carbon dioxide and methyl iodide measurements.
• Data is from 1993, representing a historical snapshot which may not reflect current ocean conditions.

Provenance

Source

World Ocean Circulation Experiment (WOCE) Discovery 200 research cruise, sourced via NASA Earthdata.

Collection Method

In-situ measurements using gas chromatography, Millipore prefiltration, and cryogenic trapping.

Time Range

1993-02-06 to 1993-03-18

Freshness

Data collection ended on 1993-03-18; no update frequency specified.

Geography

Indian and Southern Ocean, bounded by +41S to +65S latitude and +17E to +85E longitude.