August 1998 measurements of nitrous oxide, carbon dioxide, and ammonium concentrations in the water column during the RRS Charles Darwin 114B research cruise. The dataset contains 53 N2O concentration, 52 N2O saturation, 112 pCO2, 112 TCO2, and 4 NH4 measurements. It was collected by researchers for the JGOFS and OMEX programmes on the Iberian Slope in the North-East Atlantic.
Use Cases
- Analyze relationships between partial pressure of carbon dioxide (pCO2) and total inorganic carbon (TCO2) concentrations across 112 samples.
- Model nitrous oxide (N2O) saturation levels against N2O concentration measurements from 52-53 sampling points.
- Investigate spatial patterns of ammonium (NH4) concentration from 4 measurements within the defined latitude and longitude bounds.
- Calibrate regional ocean carbon cycle models using in-situ pCO2 and TCO2 data from the Iberian Slope.
- Study short-term variability in oceanic greenhouse gases (N2O, CO2) during the August 1998 cruise period.
Strengths
- 333 total chemical measurements across five distinct variables.
- Precise spatial (+42N to +43N, +9W to +10W) and temporal (August 11-24, 1998) coverage.
- Data collected as part of established international programmes (JGOFS, OMEX).
Limitations
- Very small sample size for ammonium (NH4) with only 4 measurements.
- Dataset is temporally limited to a single two-week cruise in 1998.
- Potential for methodological inconsistencies between measurements made by different principal investigators.
Provenance
- Source
- Measurements by Michel Frankignoulle (CO2), Ian Joint (N2O), and Malcolm Woodward (NH4) for SCIOPS.
- Collection Method
- In-situ sampling during research cruise, with analysis via gas chromatography (N2O), computation from pH/alkalinity (CO2), and colorimetric analysis (NH4).
- Time Range
- 1998-08-11 to 1998-08-24
- Freshness
- null
- Geography
- North-East Atlantic, Iberian Slope, bounded by +42N to +43N latitude and +9W to +10W longitude.