OISO-06 Cruise: Surface Carbon and Hydrography in the Indian Ocean

Surface underway measurements of dissolved inorganic carbon, total alkalinity, temperature, and salinity were collected during the R/V Marion-Dufresne OISO-06 cruise in the Indian Ocean from January 4 to 25, 2001. This dataset is part of the long-term OISO program, initiated in 1998, which monitors carbon dioxide and associated parameters in the South-Western Indian and Southern Oceans. The data contribute to international synthesis projects like the Surface Ocean CO2 Atlas (SOCAT) and the Global Ocean Data Analysis Project (GLODAP).

Use Cases

• Calibrating and validating ocean carbon models based on direct measurements of dissolved inorganic carbon (DIC) and total alkalinity (TALK).
• Assessing seasonal and interannual variability in surface ocean carbonate chemistry in the Indian Ocean.
• Contributing data to global carbon atlas projects like SOCAT and GLODAP for synthesis and trend analysis.
• Studying ocean acidification trends by analyzing co-located measurements of DIC, alkalinity, temperature, and salinity.

Strengths

• Data is part of a long-term monitoring program (OISO) initiated in 1998, providing context for time-series analysis.
• Contributes to major international data synthesis efforts (SOCAT, GLODAP), indicating quality and interoperability standards.
• Provides co-located measurements of key carbon system parameters (DIC, TALK) and hydrographic variables (temperature, salinity).

Limitations

• Critical metadata is missing, including specific column names, row count, file size, and data license.
• Conflicting EXPOCODE identifiers exist between the title (35MV20010104) and descriptions (35MF20010104).
• The most recent update date (2026-03-05) is inconsistent with the data collection period (2001), suggesting metadata updates rather than data revisions.

Provenance

Source

National Oceanic and Atmospheric Administration (NOAA), Department of Commerce, via the Ocean Carbon and Acidification Data System (OCADS).

Collection Method

Surface underway measurements collected during a dedicated research cruise (R/V Marion-Dufresne).

Time Range

2001-01-04 to 2001-01-25

Freshness

2026-03-05 22:51:45.844322 (metadata update)

Geography

Indian Ocean, specifically the South-Western Indian and Southern Oceans along repeated cruise lines.