- Scope
- World
- Period
- July 2026
- Source
- NOAA Global Monitoring Laboratory, marine surface sites via Trends in Atmospheric Carbon Dioxide
Environment
Global mean atmospheric CO₂ (monthly)
Monthly mean CO₂ averaged over globally distributed marine surface sites. Measured observations, published with a lag of roughly one to two months.
- Indicator code
- NOAA.CO2.GLOBAL.MONTHLY
- Unit
- parts per million (dry air mole fraction)
- Frequency
- monthly
- Default classification
- Latest available
- Original producer
- NOAA Global Monitoring Laboratory, marine surface sites
- Distributed by
- NOAA Global Monitoring Laboratory — Trends in Atmospheric Carbon Dioxide
- License
- Public domain (U.S. Government work)
- Source record
- https://gml.noaa.gov/ccgg/trends/global.html
World trend
January 1979 – July 2026
Revision history
Changes to previously published values detected during imports.
No revisions recorded since the first import.