Measurements of oceanic organosulfur compounds and ammonium were collected during the RRS Challenger 115A research cruise in the North Sea. The dataset contains 102 dimethyl sulphide (DMS) measurements and 8 ammonium (NH4) concentration measurements. Data collection was performed by researchers Angela Hatton and Duncan Purdie for the LOIS/RACS project in October 1994.
Use Cases
- Analyze spatial distribution of dimethyl sulphide (DMS) concentration across 102 sampling points to study marine sulfur emissions.
- Correlate the 8 ammonium (NH4) concentration measurements with other oceanographic parameters to assess nutrient availability.
- Model air-sea flux of DMS using concentration data within the specified North Sea geographic bounding box (+52N to +56N, +2W to +2E).
- Validate satellite-derived ocean color products related to phytoplankton activity using in-situ DMS and ammonium measurements from October 1994.
Strengths
- 102 discrete measurements of dimethyl sulphide (DMS) concentration.
- Precise temporal coverage from 6th to 17th October 1994.
- Clear geographic bounding box defined from +52N to +56N latitude and +2W to +2E longitude.
Limitations
- Very small sample size for ammonium, with only 8 measurements.
- Data is temporally limited to a single 12-day cruise in 1994.
- Unknown sample depth or vertical profile information for the water column measurements.
Provenance
- Source
- Measurements made by Angela Hatton (DMS) and Duncan Purdie (NH4) during the Challenger 115A research cruise for the LOIS/RACS project.
- Collection Method
- DMS measured by Millpore prefiltration purging, cryogenic trapping, and gas chromatography. NH4 measured by filtration and manual analysis using the phenol and sodium nitrocyanoferrate method.
- Time Range
- 1994-10-06 to 1994-10-17
- Freshness
- null
- Geography
- North Sea, bounded by +52N to +56N latitude and +2W to +2E longitude.