Atmospheric and Oceanic Trace Gas Measurements from Poseidon 211 Cruise

Over 300 individual measurements of methane, carbon dioxide, and organosulfur compounds were collected during a 12-day research voyage in the North Atlantic. SCIOPS researchers recorded data on atmospheric and oceanic concentrations, including dimethyl sulphide and ammonia. The cruise occurred from August 31 to September 11, 1995.

Use Cases

• Correlate oceanic dimethyl sulphide (DMS) concentrations with atmospheric dimethylamine measurements to study marine aerosol precursors.
• Analyze the relationship between water column partial pressure of carbon dioxide (pCO2) and atmospheric pCO2 across the cruise's latitudinal transect.
• Model spatial distributions of methane (CH4) in the water column using the 34 dissolved plus reactive particulate phase measurements.
• Investigate the partitioning of dimethylsulphoniopropionate (DMSP) between dissolved and particulate phases using the 34 and 35 measurement subsets.

Strengths

• Data includes 15 distinct chemical species measured in both ocean and atmosphere.
• Spatial coverage is well-defined from +65 to +39 latitude and -10 to -32 longitude over a focused 12-day period.

Limitations

• Sample sizes are small for many compounds, with only 5 measurements each for atmospheric amines and ammonia.
• Data is from a single, short cruise in 1995, limiting temporal and seasonal analysis.

Provenance

Source

SCIOPS via NASA Earthdata.

Collection Method

Field measurements collected during the Poseidon 211 research cruise using gas chromatography, filtration, and flow-injection gas diffusion techniques.

Time Range

1995-08-31 to 1995-09-11

Freshness

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Geography

North Atlantic Ocean, +65 to +39 latitude, -10 to -32 longitude.