Climate1979–2025ppm (parts per million)

CO₂ in the atmosphere, global mean

Name: CO₂ in the atmosphere, global mean
Creator: NOAA Global Monitoring Laboratory
License: https://gml.noaa.gov/about/disclaimer.html

Annual global mean concentration of carbon dioxide at marine surface sites, from NOAA, since 1979.

425.6 ppmWorld · 2025

NOAA Global Monitoring LaboratoryRetrieved: 2026-11-05

Saved data version: retrieved 2026-11-05, ID 6837afac7d5eWarehouse version at build: v45

Data coverage

World: 1979–2025; observations: 47; missing years: 0

Missing years are counted between the first and last observations. A missing value is not zero.

World

47 rows for World

Time range:

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Year

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World

Period statistics

Calculated from the values shown in this view for the selected period. Statistics follow the active display mode.

World

336.9→425.6

Total change: +26.4 %
Annual growth (CAGR): +0.5 %
Period: 1979–2025

World: 336.9 (1979) → 425.6 (2025). Change of +26.4 % over 46 years. Compound annual growth rate (CAGR) of +0.5 % per year.

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Format:

CO₂ in the atmosphere, global mean — World
Year	Country	Value
2025	World	425.6 ppm
2024	World	422.8 ppm
2023	World	419.4 ppm
2022	World	417.1 ppm
2021	World	414.7 ppm
2020	World	412.5 ppm
2019	World	410.1 ppm
2018	World	407.6 ppm
2017	World	405.2 ppm
2016	World	403.1 ppm
2015	World	399.7 ppm
2014	World	397.3 ppm
2013	World	395.4 ppm
2012	World	392.7 ppm
2011	World	390.6 ppm
2010	World	388.8 ppm
2009	World	386.5 ppm
2008	World	385 ppm
2007	World	382.9 ppm
2006	World	381.2 ppm

Source: NOAA Global Monitoring Laboratory
Licence: Public domain (U.S. Government work)
Published by source: —
Retrieved: 2026-11-05
Indicator code in source: co2_annmean_gl
Unit of measure: ppm (parts per million)
Data version: v45

Cite

Longseries, “CO₂ in the atmosphere, global mean”. NOAA Global Monitoring Laboratory (co2_annmean_gl), 1979–2025, World. Retrieved 2026-11-05. Public domain (U.S. Government work). Data version v45. Data SHA-256: 6837afac7d5eb248c2e9333154a2867835b5c82d7f1828a033948dacca54211e. https://longseries.com/en/d/climate-co2-global/

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Latest values

Comparison year

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Country
World	2025	425.6 ppm425.6 ppm

About this series

Annual global mean CO₂ over marine surface sites, NOAA Global Monitoring Laboratory, 1979–.

Indicator definition

Carbon dioxide in dry air averaged over a global network of remote sea-level sites, in ppm. Slightly below CO₂ in the atmosphere (Mauna Loa) because of the different stations.

How to read the data

From 337 ppm in 1979 to 426 ppm in 2025, about 0.5–1 ppm below Mauna Loa each year, with the same steady climb.

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