Arabian Sea Oceanic Gas and Nutrient Measurements from 1994

229 to 745 discrete measurements were collected for each of 10 oceanic compounds, including dimethylsulphide, methane, and carbon dioxide. Scientists Angela Hatton, Nick Owens, and others made these observations during the D210 research cruise for the ARABESQUE project. Data collection occurred between August 25 and October 5, 1994.

Use Cases

• Correlate dimethyl sulphide (DMS) concentration measurements with partial pressure of carbon dioxide (pCO2) to study biogenic gas interactions.
• Model methane (CH4) saturation in the water column against spatial coordinates (+8N to +26N, +57E to +67E) to identify emission hotspots.
• Analyze the concentration of ammonium (NH4) alongside total inorganic carbon (TCO2) measurements to investigate nutrient-carbon cycle linkages.
• Compare the two methodological corrections (Takahashi vs. Turner) applied to pCO2 measurements to assess data consistency.
• Use the 457 concurrent measurements of nitrous oxide (N2O) concentration and saturation to calculate sea-to-air flux estimates.

Strengths

• Multi-parameter dataset with 10 distinct measured variables for concurrent analysis.
• Clear provenance with specific principal investigators named for each compound group.
• Well-defined spatiotemporal scope: 42-day cruise in a bounded region of the Arabian Sea.

Limitations

• Sample sizes per variable are modest, ranging from 227 to 745 discrete measurements.
• Data is from a single, six-week cruise in 1994, limiting temporal and seasonal analysis.
• Potential methodological inconsistencies, indicated by two different correction methods for pCO2.

Provenance

Source

SCIOPS, via NASA Earthdata.

Collection Method

Ship-based measurements using gas chromatography, colorimetry, coulometry, and enzyme digestion.

Time Range

1994-08-25 to 1994-10-05

Freshness

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Geography

Arabian Sea, bounded by +8N to +26N latitude and +57E to +67E longitude.