Global Ocean-Air CO2 Flux and pCO2 Difference Climatology

Approximately one million direct gas-seawater equilibration measurements of surface ocean partial pressure of CO2 (pCO2), collected since the International Geophysical Year (1956-1959), form the basis for this dataset. It provides calculated net ocean-air carbon dioxide flux and sea-air pCO2 difference, corrected to a single reference year (1995) to account for increasing atmospheric CO2 and represent climatological distributions under non-El Nino conditions. The data synthesis relies on atmospheric CO2 records from the GLOBALVIEW-CO2 database and Mauna Loa observatory for temporal correction.

Use Cases

• Validating and tuning global ocean carbon cycle models based on spatially distributed flux estimates.
• Analyzing long-term trends in ocean carbon uptake using measurements corrected to a common reference year.
• Studying the spatial variability of air-sea CO2 exchange across ocean basins and gyres.
• Assessing the ocean's role in the global carbon budget under non-El Nino climatological conditions.

Strengths

• Based on a large foundational sample of approximately one million direct pCO2 measurements.
• Provides a temporally consistent climatology by correcting all measurements to the reference year 1995.
• Cross-platform presence on Data.gov and NASA EarthData signals established scientific use.

Limitations

• Column names and exact data structure are not provided in any source description.
• Conflicting 'last updated' metadata: Data.gov shows 2026-04-10 (likely an error or placeholder), while NASA EarthData shows 1995-12 31.
• Dataset represents a specific climatological state (non-El Nino) and may not capture interannual variability.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Direct gas-seawater equilibration measurements from the global ocean, synthesized and corrected using atmospheric CO2 data from GLOBALVIEW-CO2 and Mauna Loa.

Time Range

1956-1959 to approximately 2000 (measurements span from the International Geophysical Year; correction databases extend to 2000).

Freshness

1995-12-31 23:59:59.999000

Geography

Global ocean surface waters, with specific mention of the Atlantic Ocean north of 50 degrees and bands at 45 degrees N and 50 degrees S.