OISO-25: Surface Ocean Carbon and Physical Properties in the Indian Ocean

Indian Ocean surface underway data from the R/V Marion Dufresne cruise OISO-25, collected between January 7 and 26, 2016. The dataset includes measurements of the partial pressure of carbon dioxide, salinity, sea surface temperature, barometric pressure, and fluorescence. These data were collected using a CO2 gas analyzer and a thin-film equilibrator to study ocean carbon dynamics and acidification.

Use Cases

• Modeling air-sea CO2 flux based on partial pressure of carbon dioxide measurements.
• Analyzing ocean acidification trends using concurrent measurements of carbon dioxide and salinity.
• Studying phytoplankton biomass distribution via fluorescence data.
• Investigating physical oceanographic conditions using sea surface temperature and salinity records.

Strengths

• Data collected over a specific 20-day cruise (2016-01-07 to 2016-01-26) providing a focused temporal snapshot.
• Includes direct, instrument-based measurements of key carbon cycle variables (CO2 partial pressure) using specialized analyzers.
• Cross-platform presence on datagov and nasa_earthdata signals importance and accessibility.

Limitations

• Critical metadata is missing, including row count, file size, specific column names, and license information.
• The exact data format and structure are unknown, which may hinder immediate analysis.
• Conflicting update dates exist between platforms (2016 vs. 2026), creating uncertainty about data currency.

Provenance

Source

Nicolas Metzl and Claire Lo Monaco of Sorbonne University (formerly Universite Pierre et Marie Curie).

Collection Method

Surface underway measurements collected from the R/V Marion Dufresne using a Carbon dioxide (CO2) gas analyzer and a Thin film type equilibrator.

Time Range

2016-01-07 to 2016-01-26

Freshness

Last updated date conflicts: 2016-01-26 on nasa_earthdata vs. 2026-03-05 on datagov.

Geography

Indian Ocean, along the cruise track of R/V Marion Dufresne (OISO-25).