OISO-09 Cruise: Surface Ocean Carbon Chemistry in the Indian Ocean

OISO-09 cruise data from 2002 provides surface underway measurements of dissolved inorganic carbon and total alkalinity, key parameters for studying ocean acidification. This dataset is part of a long-term monitoring program initiated in 1998, collecting repeated transects in the South-Western Indian and Southern Oceans. Its measurements are regularly incorporated into major international synthesis projects like SOCAT and GLODAP.

Use Cases

• Calibrating ocean carbon models based on direct measurements of DIC and TALK.
• Assessing ocean acidification trends in the Indian Ocean using time-series data from repeated cruise lines.
• Validating satellite-derived sea surface salinity and temperature products with in-situ measurements.
• Contributing data to the Surface Ocean CO2 Atlas (SOCAT) for global carbon budget calculations.

Strengths

• Data is part of a long-term, systematic monitoring program (OISO) initiated in 1998.
• Includes core parameters for ocean carbon studies (DIC, TALK, pCO2, nutrients, chlorophyll).
• Regularly incorporated into authoritative international synthesis projects (SOCAT, GLODAP).

Limitations

• Column names and precise data structure are not provided in the available metadata.
• Exact row count and file size are unknown, limiting assessment of data volume.
• Conflicting 'last updated' dates (2002-09-17 vs. 2026-03-05) create uncertainty about metadata maintenance.

Provenance

Source

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

Collection Method

Surface underway measurements collected during the R/V Marion-Dufresne OISO-09 research cruise.

Time Range

2002-08-24 to 2002-09-17

Freshness

2026-03-05 22:41:51.538306 (most recent update from datagov)

Geography

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