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Climate2001–2025ppb (parts per billion)

Nitrous oxide in the atmosphere

Annual global mean concentration of nitrous oxide, from NOAA, since 2001.

338.9 ppbWorld · 2025

NOAA Global Monitoring LaboratoryRetrieved: 2026-11-05
Saved data version: retrieved 2026-11-05, ID d5d021083457Warehouse version at build: v45
Data coverage
  • World: 2001–2025; observations: 25; missing years: 0

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

World

25 rows for World

Time range:
315.0320.0325.0330.0335.0340.0200120052010201520202025338.9
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

316.4→338.9

Total change
+7.1 %
Annual growth (CAGR)
+0.3 %
Period
2001–2025

World: 316.4 (2001) → 338.9 (2025). Change of +7.1 % over 24 years. Compound annual growth rate (CAGR) of +0.3 % per year.

Compare on chart

Format:
Nitrous oxide in the atmosphere — World
YearCountryValue
2025World338.9 ppb
2024World337.7 ppb
2023World336.7 ppb
2022World335.6 ppb
2021World334.3 ppb
2020World333 ppb
2019World331.9 ppb
2018World330.9 ppb
2017World329.7 ppb
2016World329 ppb
2015World328.2 ppb
2014World327.1 ppb
2013World325.9 ppb
2012World325.1 ppb
2011World324.2 ppb
2010World323.2 ppb
2009World322.3 ppb
2008World321.5 ppb
2007World320.4 ppb
2006World319.8 ppb
Source
NOAA Global Monitoring Laboratory
Licence
Public domain (U.S. Government work)
Published by source
—
Retrieved
2026-11-05
Indicator code in source
n2o_annmean_gl
Unit of measure
ppb (parts per billion)
Data version
v45

Cite

Longseries, “Nitrous oxide in the atmosphere”. NOAA Global Monitoring Laboratory (n2o_annmean_gl), 2001–2025, World. Retrieved 2026-11-05. Public domain (U.S. Government work). Data version v45. Data SHA-256: d5d021083457510cdeb8f96e5839a900592b372efb69b753828e03fb8fc28801. https://longseries.com/en/d/climate-n2o-global/

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No source revisions recorded yet — revisions are logged when an official source updates historical values.

Latest values

1 place — sorted by value, highest first
Country
World2025338.9 ppb338.9 ppb

About this series

Annual global mean N₂O, NOAA Global Monitoring Laboratory, 2001–.

Indicator definition

Nitrous oxide in dry air, in parts per billion (ppb). Mostly from fertilised soils; it also depletes the ozone layer.

How to read the data

From 316 ppb in 2001 to 339 ppb in 2025, a steady rise of about 1 ppb a year.

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