OISO-18: Indian Ocean Surface Carbon Dioxide and Salinity Measurements from 2009-2010

The OISO-18 dataset from the International CLIVAR Global Ocean Carbon and Repeat Hydrography Program contains surface underway observations of carbon dioxide partial pressure, salinity, and related variables. Data were collected during the R/V Marion Dufresne cruise in the Indian Ocean from December 19, 2009, to January 24, 2010. Nicolas Metzl of Sorbonne University collected the data using carbon dioxide gas analyzers and thin film equilibrators.

Use Cases

• Modeling ocean-atmosphere carbon dioxide exchange based on partial pressure measurements
• Analyzing spatial and temporal variability of surface salinity and water temperature
• Studying ocean acidification trends based on carbon dioxide fugacity in water
• Calibrating satellite-derived ocean carbon data with in-situ surface underway observations

Strengths

• Data collection occurred during a dedicated research cruise (EXPOCODE 35MF20091219) over a 36-day period
• Includes multiple related variables: carbon dioxide in air and water, salinity, temperature, barometric pressure, and fluorescence
• Data are part of a systematic global re-occupation program (CLIVAR) for quantifying changes in carbon storage

Limitations

• Column-level documentation is absent; field semantics must be inferred after download
• Row count is unknown, which may limit suitability assessment
• Data may reflect geographic and temporal bias inherent to a single cruise track

Provenance

Source

National Oceanic and Atmospheric Administration, Department of Commerce

Collection Method

Surface underway observations collected using Carbon dioxide (CO2) gas analyzer and Thin film type equilibrator

Time Range

2009-12-19 to 2010-01-24

Freshness

Last updated 2026-03 05 23:33:16.019642; freshness should be verified

Geography

Indian Ocean