OISO-24: Sea Surface Carbon and Hydrographic Measurements

Surface underway measurements of dissolved inorganic carbon, total alkalinity, temperature, and salinity were collected during the R/V Marion-Dufresne OISO-24 cruise in the Indian Ocean from January 7 to February 6, 2015. The data are part of the long-running OISO program, initiated in 1998, which complements the international CO2 observing system. These observations are regularly included in global syntheses like SOCAT and GLODAP.

Use Cases

• Calibrating ocean carbon models based on direct measurements of DIC and alkalinity.
• Assessing ocean acidification trends in the South-Western Indian Ocean using time-series data.
• Validating satellite-derived sea surface salinity and temperature products with in-situ underway data.
• Contributing to international carbon budget syntheses (SOCAT, GLODAP) with standardized cruise data.

Strengths

• Part of a long-term, systematic time-series program initiated in 1998.
• Data are integrated into authoritative international synthesis products (SOCAT, GLODAP).
• Covers a specific, well-documented cruise (EXPOCODE 35MF20150107) with a precise time range.

Limitations

• Column names and row counts are unspecified across all sources, limiting immediate usability.
• Conflicting 'last updated' metadata (2015 vs. 2026) creates uncertainty about data currency.
• Sparse metadata; license, author, and exact data structure are unknown.

Provenance

Source

National Oceanic and Atmospheric Administration (NOAA), Department of Commerce via NCEI.

Collection Method

Surface underway measurements collected during a dedicated oceanographic research cruise.

Time Range

2015-01-07 to 2015-02-06

Freshness

2026-03-05 (most recent platform update, though data is from 2015)

Geography

Indian Ocean, specifically the South-Western Indian and Southern Oceans cruise track.