HUMANITYVECTOR

Atmospheric CO2, global monthly mean

Observed

Globally averaged marine surface CO2 mole fraction, monthly mean, parts per million (not deseasonalized).

Ingestedfrom NOAAfreshJSON export
Current value, World
428.73ppm
period 2026-05-01
Geography
World (WLD)
Observation date
2026-05-01
Unit
ppm
Frequency
monthly
Ingested
2026-09-07 20:00 UTC
1-year change+0.07worsening+0.02%2026-04-01 to 2026-05-01from 428.66 to 428.73 ppm
10-year trend+0.11% per yearworsening+1.09%2025-07-01 to 2026-05-01compound annual growth rate; total +4.64 ppm, from 424.09 to 428.73 ppm
Historical series

Atmospheric CO2, global monthly mean, World

Observed
3203403603804004204401979-01-011985-01-011991-01-011997-01-012003-01-012009-01-012015-01-012021-01-012026-05-01PPM428.73
569 observations, 1979-01-01 to 2026-05-01latest point emphasised
Data table (569 rows)
Atmospheric CO2, global monthly mean, World: 569 observations from 1979-01-01 to 2026-05-01, values from 334.36 to 428.73 ppm. Latest 428.73 ppm in 2026-05-01. Full data table below.
PeriodValue (ppm)Source revisionIngested at
2026-05-01428.732026-08-052026-09-07 20:00 UTC
2026-04-01428.662026-08-052026-09-07 20:00 UTC
2026-03-01428.512026-08-052026-09-07 20:00 UTC
2026-02-01428.472026-08-052026-09-07 20:00 UTC
2026-01-01428.022026-08-052026-09-07 20:00 UTC
2025-12-01427.312026-08-052026-09-07 20:00 UTC
2025-11-01426.392026-08-052026-09-07 20:00 UTC
2025-10-01424.662026-08-052026-09-07 20:00 UTC
2025-09-01423.062026-08-052026-09-07 20:00 UTC
2025-08-01422.862026-08-052026-09-07 20:00 UTC
2025-07-01424.092026-08-052026-09-07 20:00 UTC
2025-06-01425.92026-08-052026-09-07 20:00 UTC
2025-05-01427.042026-08-052026-09-07 20:00 UTC
2025-04-01427.032026-08-052026-09-07 20:00 UTC
2025-03-01426.662026-08-052026-09-07 20:00 UTC
2025-02-01426.462026-08-052026-09-07 20:00 UTC
2025-01-01426.012026-08-052026-09-07 20:00 UTC
2024-12-01425.22026-08-052026-09-07 20:00 UTC
2024-11-01424.072026-08-052026-09-07 20:00 UTC
2024-10-01422.332026-08-052026-09-07 20:00 UTC
2024-09-01420.592026-08-052026-09-07 20:00 UTC
2024-08-01420.282026-08-052026-09-07 20:00 UTC
2024-07-01421.612026-08-052026-09-07 20:00 UTC
2024-06-01423.232026-08-052026-09-07 20:00 UTC
2024-05-01423.932026-08-052026-09-07 20:00 UTC
2024-04-01423.852026-08-052026-09-07 20:00 UTC
2024-03-01423.382026-08-052026-09-07 20:00 UTC
2024-02-01422.792026-08-052026-09-07 20:00 UTC
2024-01-01422.22026-08-052026-09-07 20:00 UTC
2023-12-01421.52026-08-052026-09-07 20:00 UTC
2023-11-01420.42026-08-052026-09-07 20:00 UTC
2023-10-01418.842026-08-052026-09-07 20:00 UTC
2023-09-01417.182026-08-052026-09-07 20:00 UTC
2023-08-01416.782026-08-052026-09-07 20:00 UTC
2023-07-01417.922026-08-052026-09-07 20:00 UTC
2023-06-01419.572026-08-052026-09-07 20:00 UTC
2023-05-01420.562026-08-052026-09-07 20:00 UTC
2023-04-01420.482026-08-052026-09-07 20:00 UTC
2023-03-01419.982026-08-052026-09-07 20:00 UTC
2023-02-01419.652026-08-052026-09-07 20:00 UTC
2023-01-01419.372026-08-052026-09-07 20:00 UTC
2022-12-01418.912026-08-052026-09-07 20:00 UTC
2022-11-01417.842026-08-052026-09-07 20:00 UTC
2022-10-01416.132026-08-052026-09-07 20:00 UTC
2022-09-01414.622026-08-052026-09-07 20:00 UTC
2022-08-01414.42026-08-052026-09-07 20:00 UTC
2022-07-01415.672026-08-052026-09-07 20:00 UTC
2022-06-01417.432026-08-052026-09-07 20:00 UTC
2022-05-01418.452026-08-052026-09-07 20:00 UTC
2022-04-01418.582026-08-052026-09-07 20:00 UTC
2022-03-01418.162026-08-052026-09-07 20:00 UTC
2022-02-01417.642026-08-052026-09-07 20:00 UTC
2022-01-01417.182026-08-052026-09-07 20:00 UTC
2021-12-01416.62026-08-052026-09-07 20:00 UTC
2021-11-01415.582026-08-052026-09-07 20:00 UTC
2021-10-01413.832026-08-052026-09-07 20:00 UTC
2021-09-01412.382026-08-052026-09-07 20:00 UTC
2021-08-01412.152026-08-052026-09-07 20:00 UTC
2021-07-01413.452026-08-052026-09-07 20:00 UTC
2021-06-01415.22026-08-052026-09-07 20:00 UTC
2021-05-01416.012026-08-052026-09-07 20:00 UTC
2021-04-01415.812026-08-052026-09-07 20:00 UTC
2021-03-01415.492026-08-052026-09-07 20:00 UTC
2021-02-01415.22026-08-052026-09-07 20:00 UTC
2021-01-01414.732026-08-052026-09-07 20:00 UTC
2020-12-01414.142026-08-052026-09-07 20:00 UTC
2020-11-01413.252026-08-052026-09-07 20:00 UTC
2020-10-01411.662026-08-052026-09-07 20:00 UTC
2020-09-014102026-08-052026-09-07 20:00 UTC
2020-08-01409.732026-08-052026-09-07 20:00 UTC
2020-07-01411.172026-08-052026-09-07 20:00 UTC
2020-06-01412.882026-08-052026-09-07 20:00 UTC
2020-05-01413.812026-08-052026-09-07 20:00 UTC
2020-04-01413.862026-08-052026-09-07 20:00 UTC
2020-03-01413.442026-08-052026-09-07 20:00 UTC
2020-02-01412.952026-08-052026-09-07 20:00 UTC
2020-01-01412.432026-08-052026-09-07 20:00 UTC
2019-12-01411.762026-08-052026-09-07 20:00 UTC
2019-11-01410.872026-08-052026-09-07 20:00 UTC
2019-10-01409.442026-08-052026-09-07 20:00 UTC
2019-09-01407.922026-08-052026-09-07 20:00 UTC
2019-08-01407.642026-08-052026-09-07 20:00 UTC
2019-07-01408.882026-08-052026-09-07 20:00 UTC
2019-06-01410.532026-08-052026-09-07 20:00 UTC
2019-05-01411.342026-08-052026-09-07 20:00 UTC
2019-04-01411.332026-08-052026-09-07 20:00 UTC
2019-03-01410.892026-08-052026-09-07 20:00 UTC
2019-02-01410.342026-08-052026-09-07 20:00 UTC
2019-01-01409.922026-08-052026-09-07 20:00 UTC
2018-12-01409.192026-08-052026-09-07 20:00 UTC
2018-11-01408.132026-08-052026-09-07 20:00 UTC
2018-10-01406.652026-08-052026-09-07 20:00 UTC
2018-09-01405.182026-08-052026-09-07 20:00 UTC
2018-08-01405.112026-08-052026-09-07 20:00 UTC
2018-07-01406.492026-08-052026-09-07 20:00 UTC
2018-06-01408.062026-08-052026-09-07 20:00 UTC
2018-05-01408.942026-08-052026-09-07 20:00 UTC
2018-04-01409.072026-08-052026-09-07 20:00 UTC
2018-03-01408.772026-08-052026-09-07 20:00 UTC
2018-02-01408.232026-08-052026-09-07 20:00 UTC
2018-01-01407.532026-08-052026-09-07 20:00 UTC
2017-12-01406.752026-08-052026-09-07 20:00 UTC
2017-11-01405.72026-08-052026-09-07 20:00 UTC
2017-10-01404.162026-08-052026-09-07 20:00 UTC
2017-09-01402.662026-08-052026-09-07 20:00 UTC
2017-08-01402.572026-08-052026-09-07 20:00 UTC
2017-07-01404.112026-08-052026-09-07 20:00 UTC
2017-06-01405.852026-08-052026-09-07 20:00 UTC
2017-05-01406.642026-08-052026-09-07 20:00 UTC
2017-04-01406.62026-08-052026-09-07 20:00 UTC
2017-03-01406.322026-08-052026-09-07 20:00 UTC
2017-02-01405.912026-08-052026-09-07 20:00 UTC
2017-01-01405.332026-08-052026-09-07 20:00 UTC
2016-12-01404.672026-08-052026-09-07 20:00 UTC
2016-11-01403.762026-08-052026-09-07 20:00 UTC
2016-10-01402.412026-08-052026-09-07 20:00 UTC
2016-09-01400.962026-08-052026-09-07 20:00 UTC
2016-08-01400.782026-08-052026-09-07 20:00 UTC
2016-07-01402.12026-08-052026-09-07 20:00 UTC
2016-06-01403.622026-08-052026-09-07 20:00 UTC
2016-05-01404.42026-08-052026-09-07 20:00 UTC
2016-04-01404.362026-08-052026-09-07 20:00 UTC
2016-03-01403.852026-08-052026-09-07 20:00 UTC
2016-02-01403.262026-08-052026-09-07 20:00 UTC
2016-01-01402.622026-08-052026-09-07 20:00 UTC
2015-12-01401.662026-08-052026-09-07 20:00 UTC
2015-11-01400.362026-08-052026-09-07 20:00 UTC
2015-10-01398.82026-08-052026-09-07 20:00 UTC
2015-09-01397.342026-08-052026-09-07 20:00 UTC
2015-08-01397.072026-08-052026-09-07 20:00 UTC
2015-07-01398.382026-08-052026-09-07 20:00 UTC
2015-06-01400.062026-08-052026-09-07 20:00 UTC
2015-05-01400.912026-08-052026-09-07 20:00 UTC
2015-04-01400.962026-08-052026-09-07 20:00 UTC
2015-03-01400.572026-08-052026-09-07 20:00 UTC
2015-02-01400.122026-08-052026-09-07 20:00 UTC
2015-01-01399.562026-08-052026-09-07 20:00 UTC
2014-12-01398.832026-08-052026-09-07 20:00 UTC
2014-11-01397.862026-08-052026-09-07 20:00 UTC
2014-10-01396.382026-08-052026-09-07 20:00 UTC
2014-09-01395.122026-08-052026-09-07 20:00 UTC
2014-08-01395.022026-08-052026-09-07 20:00 UTC
2014-07-01396.132026-08-052026-09-07 20:00 UTC
2014-06-01397.722026-08-052026-09-07 20:00 UTC
2014-05-01398.692026-08-052026-09-07 20:00 UTC
2014-04-01398.632026-08-052026-09-07 20:00 UTC
2014-03-01398.272026-08-052026-09-07 20:00 UTC
2014-02-01397.972026-08-052026-09-07 20:00 UTC
2014-01-01397.512026-08-052026-09-07 20:00 UTC
2013-12-01396.872026-08-052026-09-07 20:00 UTC
2013-11-01395.962026-08-052026-09-07 20:00 UTC
2013-10-01394.52026-08-052026-09-07 20:00 UTC
2013-09-01393.212026-08-052026-09-07 20:00 UTC
2013-08-01393.242026-08-052026-09-07 20:00 UTC
2013-07-01394.482026-08-052026-09-07 20:00 UTC
2013-06-01395.962026-08-052026-09-07 20:00 UTC
2013-05-01396.752026-08-052026-09-07 20:00 UTC
2013-04-01396.742026-08-052026-09-07 20:00 UTC
2013-03-01396.282026-08-052026-09-07 20:00 UTC
2013-02-01395.692026-08-052026-09-07 20:00 UTC
2013-01-01395.072026-08-052026-09-07 20:00 UTC
2012-12-01394.392026-08-052026-09-07 20:00 UTC
2012-11-01393.562026-08-052026-09-07 20:00 UTC
2012-10-01392.162026-08-052026-09-07 20:00 UTC
2012-09-01390.552026-08-052026-09-07 20:00 UTC
2012-08-01389.892026-08-052026-09-07 20:00 UTC
2012-07-013912026-08-052026-09-07 20:00 UTC
2012-06-01392.842026-08-052026-09-07 20:00 UTC
2012-05-01393.882026-08-052026-09-07 20:00 UTC
2012-04-01393.992026-08-052026-09-07 20:00 UTC
2012-03-01393.722026-08-052026-09-07 20:00 UTC
2012-02-01393.22026-08-052026-09-07 20:00 UTC
2012-01-01392.612026-08-052026-09-07 20:00 UTC
2011-12-01392.022026-08-052026-09-07 20:00 UTC
2011-11-01391.192026-08-052026-09-07 20:00 UTC
2011-10-01389.832026-08-052026-09-07 20:00 UTC
2011-09-01388.272026-08-052026-09-07 20:00 UTC
2011-08-01387.872026-08-052026-09-07 20:00 UTC
2011-07-01389.22026-08-052026-09-07 20:00 UTC
2011-06-01391.142026-08-052026-09-07 20:00 UTC
2011-05-01392.082026-08-052026-09-07 20:00 UTC
2011-04-01392.052026-08-052026-09-07 20:00 UTC
2011-03-01391.662026-08-052026-09-07 20:00 UTC
2011-02-01391.292026-08-052026-09-07 20:00 UTC
2011-01-01390.852026-08-052026-09-07 20:00 UTC
2010-12-01390.342026-08-052026-09-07 20:00 UTC
2010-11-01389.622026-08-052026-09-07 20:00 UTC
2010-10-01388.252026-08-052026-09-07 20:00 UTC
2010-09-01386.72026-08-052026-09-07 20:00 UTC
2010-08-01386.232026-08-052026-09-07 20:00 UTC
2010-07-01387.352026-08-052026-09-07 20:00 UTC
2010-06-01389.012026-08-052026-09-07 20:00 UTC
2010-05-01389.952026-08-052026-09-07 20:00 UTC
2010-04-01389.982026-08-052026-09-07 20:00 UTC
2010-03-01389.682026-08-052026-09-07 20:00 UTC
2010-02-01389.342026-08-052026-09-07 20:00 UTC
2010-01-01388.622026-08-052026-09-07 20:00 UTC
2009-12-01387.842026-08-052026-09-07 20:00 UTC
2009-11-01386.942026-08-052026-09-07 20:00 UTC
2009-10-01385.492026-08-052026-09-07 20:00 UTC
2009-09-01383.932026-08-052026-09-07 20:00 UTC
2009-08-01383.632026-08-052026-09-07 20:00 UTC
2009-07-01385.012026-08-052026-09-07 20:00 UTC
2009-06-01386.962026-08-052026-09-07 20:00 UTC
2009-05-01387.952026-08-052026-09-07 20:00 UTC
2009-04-01387.992026-08-052026-09-07 20:00 UTC
2009-03-01387.712026-08-052026-09-07 20:00 UTC
2009-02-01387.482026-08-052026-09-07 20:00 UTC
2009-01-01387.032026-08-052026-09-07 20:00 UTC
2008-12-01386.272026-08-052026-09-07 20:00 UTC
2008-11-01385.182026-08-052026-09-07 20:00 UTC
2008-10-01383.672026-08-052026-09-07 20:00 UTC
2008-09-01382.542026-08-052026-09-07 20:00 UTC
2008-08-01382.772026-08-052026-09-07 20:00 UTC
2008-07-01384.12026-08-052026-09-07 20:00 UTC
2008-06-01385.582026-08-052026-09-07 20:00 UTC
2008-05-01386.492026-08-052026-09-07 20:00 UTC
2008-04-01386.532026-08-052026-09-07 20:00 UTC
2008-03-01386.152026-08-052026-09-07 20:00 UTC
2008-02-01385.742026-08-052026-09-07 20:00 UTC
2008-01-01385.232026-08-052026-09-07 20:00 UTC
2007-12-01384.462026-08-052026-09-07 20:00 UTC
2007-11-01383.452026-08-052026-09-07 20:00 UTC
2007-10-01382.12026-08-052026-09-07 20:00 UTC
2007-09-01380.692026-08-052026-09-07 20:00 UTC
2007-08-01380.32026-08-052026-09-07 20:00 UTC
2007-07-01381.552026-08-052026-09-07 20:00 UTC
2007-06-01383.262026-08-052026-09-07 20:00 UTC
2007-05-01384.122026-08-052026-09-07 20:00 UTC
2007-04-01384.272026-08-052026-09-07 20:00 UTC
2007-03-01384.012026-08-052026-09-07 20:00 UTC
2007-02-01383.542026-08-052026-09-07 20:00 UTC
2007-01-01383.032026-08-052026-09-07 20:00 UTC
2006-12-01382.42026-08-052026-09-07 20:00 UTC
2006-11-01381.452026-08-052026-09-07 20:00 UTC
2006-10-01380.092026-08-052026-09-07 20:00 UTC
2006-09-01378.632026-08-052026-09-07 20:00 UTC
2006-08-01378.472026-08-052026-09-07 20:00 UTC
2006-07-01380.062026-08-052026-09-07 20:00 UTC
2006-06-01381.762026-08-052026-09-07 20:00 UTC
2006-05-01382.622026-08-052026-09-07 20:00 UTC
2006-04-01382.672026-08-052026-09-07 20:00 UTC
2006-03-01382.352026-08-052026-09-07 20:00 UTC
2006-02-01381.962026-08-052026-09-07 20:00 UTC
2006-01-01381.342026-08-052026-09-07 20:00 UTC
2005-12-01380.532026-08-052026-09-07 20:00 UTC
2005-11-01379.532026-08-052026-09-07 20:00 UTC
2005-10-01378.072026-08-052026-09-07 20:00 UTC
2005-09-01376.762026-08-052026-09-07 20:00 UTC
2005-08-01376.732026-08-052026-09-07 20:00 UTC
2005-07-01377.942026-08-052026-09-07 20:00 UTC
2005-06-01379.62026-08-052026-09-07 20:00 UTC
2005-05-01380.422026-08-052026-09-07 20:00 UTC
2005-04-01380.322026-08-052026-09-07 20:00 UTC
2005-03-01379.872026-08-052026-09-07 20:00 UTC
2005-02-01379.272026-08-052026-09-07 20:00 UTC
2005-01-01378.732026-08-052026-09-07 20:00 UTC
2004-12-01378.162026-08-052026-09-07 20:00 UTC
2004-11-01377.192026-08-052026-09-07 20:00 UTC
2004-10-01375.722026-08-052026-09-07 20:00 UTC
2004-09-01374.382026-08-052026-09-07 20:00 UTC
2004-08-01374.482026-08-052026-09-07 20:00 UTC
2004-07-01375.952026-08-052026-09-07 20:00 UTC
2004-06-01377.512026-08-052026-09-07 20:00 UTC
2004-05-01378.42026-08-052026-09-07 20:00 UTC
2004-04-01378.472026-08-052026-09-07 20:00 UTC
2004-03-01378.142026-08-052026-09-07 20:00 UTC
2004-02-01377.722026-08-052026-09-07 20:00 UTC
2004-01-01377.212026-08-052026-09-07 20:00 UTC
2003-12-01376.522026-08-052026-09-07 20:00 UTC
2003-11-01375.652026-08-052026-09-07 20:00 UTC
2003-10-01374.362026-08-052026-09-07 20:00 UTC
2003-09-01373.092026-08-052026-09-07 20:00 UTC
2003-08-01372.932026-08-052026-09-07 20:00 UTC
2003-07-01374.162026-08-052026-09-07 20:00 UTC
2003-06-01375.712026-08-052026-09-07 20:00 UTC
2003-05-01376.542026-08-052026-09-07 20:00 UTC
2003-04-01376.392026-08-052026-09-07 20:00 UTC
2003-03-01375.912026-08-052026-09-07 20:00 UTC
2003-02-01375.472026-08-052026-09-07 20:00 UTC
2003-01-01374.942026-08-052026-09-07 20:00 UTC
2002-12-01374.262026-08-052026-09-07 20:00 UTC
2002-11-01373.282026-08-052026-09-07 20:00 UTC
2002-10-01371.952026-08-052026-09-07 20:00 UTC
2002-09-01370.672026-08-052026-09-07 20:00 UTC
2002-08-01370.352026-08-052026-09-07 20:00 UTC
2002-07-01371.412026-08-052026-09-07 20:00 UTC
2002-06-01372.842026-08-052026-09-07 20:00 UTC
2002-05-01373.712026-08-052026-09-07 20:00 UTC
2002-04-01373.732026-08-052026-09-07 20:00 UTC
2002-03-01373.382026-08-052026-09-07 20:00 UTC
2002-02-01372.912026-08-052026-09-07 20:00 UTC
2002-01-01372.512026-08-052026-09-07 20:00 UTC
2001-12-01371.972026-08-052026-09-07 20:00 UTC
2001-11-01371.052026-08-052026-09-07 20:00 UTC
2001-10-01369.712026-08-052026-09-07 20:00 UTC
2001-09-01368.362026-08-052026-09-07 20:00 UTC
2001-08-01368.322026-08-052026-09-07 20:00 UTC
2001-07-01369.452026-08-052026-09-07 20:00 UTC
2001-06-01370.812026-08-052026-09-07 20:00 UTC
2001-05-01371.762026-08-052026-09-07 20:00 UTC
2001-04-01371.92026-08-052026-09-07 20:00 UTC
2001-03-01371.592026-08-052026-09-07 20:00 UTC
2001-02-01371.182026-08-052026-09-07 20:00 UTC
2001-01-01370.692026-08-052026-09-07 20:00 UTC
2000-12-01370.12026-08-052026-09-07 20:00 UTC
2000-11-01369.282026-08-052026-09-07 20:00 UTC
2000-10-01367.912026-08-052026-09-07 20:00 UTC
2000-09-01366.712026-08-052026-09-07 20:00 UTC
2000-08-01366.762026-08-052026-09-07 20:00 UTC
2000-07-01367.912026-08-052026-09-07 20:00 UTC
2000-06-01369.312026-08-052026-09-07 20:00 UTC
2000-05-01370.242026-08-052026-09-07 20:00 UTC
2000-04-01370.352026-08-052026-09-07 20:00 UTC
2000-03-01369.972026-08-052026-09-07 20:00 UTC
2000-02-01369.652026-08-052026-09-07 20:00 UTC
2000-01-01369.382026-08-052026-09-07 20:00 UTC
1999-12-01368.882026-08-052026-09-07 20:00 UTC
1999-11-01368.042026-08-052026-09-07 20:00 UTC
1999-10-01366.752026-08-052026-09-07 20:00 UTC
1999-09-01365.452026-08-052026-09-07 20:00 UTC
1999-08-01365.332026-08-052026-09-07 20:00 UTC
1999-07-01366.692026-08-052026-09-07 20:00 UTC
1999-06-01368.362026-08-052026-09-07 20:00 UTC
1999-05-01369.212026-08-052026-09-07 20:00 UTC
1999-04-01369.292026-08-052026-09-07 20:00 UTC
1999-03-01368.92026-08-052026-09-07 20:00 UTC
1999-02-01368.512026-08-052026-09-07 20:00 UTC
1999-01-01368.112026-08-052026-09-07 20:00 UTC
1998-12-01367.472026-08-052026-09-07 20:00 UTC
1998-11-01366.62026-08-052026-09-07 20:00 UTC
1998-10-01365.342026-08-052026-09-07 20:00 UTC
1998-09-01364.032026-08-052026-09-07 20:00 UTC
1998-08-01363.792026-08-052026-09-07 20:00 UTC
1998-07-01364.832026-08-052026-09-07 20:00 UTC
1998-06-01366.262026-08-052026-09-07 20:00 UTC
1998-05-01366.862026-08-052026-09-07 20:00 UTC
1998-04-01366.582026-08-052026-09-07 20:00 UTC
1998-03-01365.932026-08-052026-09-07 20:00 UTC
1998-02-01365.472026-08-052026-09-07 20:00 UTC
1998-01-01365.192026-08-052026-09-07 20:00 UTC
1997-12-01364.682026-08-052026-09-07 20:00 UTC
1997-11-01363.612026-08-052026-09-07 20:00 UTC
1997-10-01361.932026-08-052026-09-07 20:00 UTC
1997-09-01360.42026-08-052026-09-07 20:00 UTC
1997-08-01360.42026-08-052026-09-07 20:00 UTC
1997-07-01361.932026-08-052026-09-07 20:00 UTC
1997-06-01363.582026-08-052026-09-07 20:00 UTC
1997-05-01364.52026-08-052026-09-07 20:00 UTC
1997-04-01364.52026-08-052026-09-07 20:00 UTC
1997-03-01364.022026-08-052026-09-07 20:00 UTC
1997-02-01363.632026-08-052026-09-07 20:00 UTC
1997-01-01363.262026-08-052026-09-07 20:00 UTC
1996-12-01362.632026-08-052026-09-07 20:00 UTC
1996-11-01361.782026-08-052026-09-07 20:00 UTC
1996-10-01360.672026-08-052026-09-07 20:00 UTC
1996-09-01359.72026-08-052026-09-07 20:00 UTC
1996-08-01360.072026-08-052026-09-07 20:00 UTC
1996-07-01361.572026-08-052026-09-07 20:00 UTC
1996-06-01362.882026-08-052026-09-07 20:00 UTC
1996-05-01363.292026-08-052026-09-07 20:00 UTC
1996-04-01363.142026-08-052026-09-07 20:00 UTC
1996-03-01362.822026-08-052026-09-07 20:00 UTC
1996-02-01362.52026-08-052026-09-07 20:00 UTC
1996-01-01362.142026-08-052026-09-07 20:00 UTC
1995-12-01361.652026-08-052026-09-07 20:00 UTC
1995-11-01360.772026-08-052026-09-07 20:00 UTC
1995-10-01359.432026-08-052026-09-07 20:00 UTC
1995-09-01358.062026-08-052026-09-07 20:00 UTC
1995-08-01357.742026-08-052026-09-07 20:00 UTC
1995-07-013592026-08-052026-09-07 20:00 UTC
1995-06-01360.622026-08-052026-09-07 20:00 UTC
1995-05-01361.472026-08-052026-09-07 20:00 UTC
1995-04-01361.552026-08-052026-09-07 20:00 UTC
1995-03-01361.082026-08-052026-09-07 20:00 UTC
1995-02-01360.622026-08-052026-09-07 20:00 UTC
1995-01-01360.132026-08-052026-09-07 20:00 UTC
1994-12-01359.542026-08-052026-09-07 20:00 UTC
1994-11-01358.692026-08-052026-09-07 20:00 UTC
1994-10-01357.272026-08-052026-09-07 20:00 UTC
1994-09-01356.022026-08-052026-09-07 20:00 UTC
1994-08-01356.062026-08-052026-09-07 20:00 UTC
1994-07-01357.272026-08-052026-09-07 20:00 UTC
1994-06-01358.82026-08-052026-09-07 20:00 UTC
1994-05-01359.742026-08-052026-09-07 20:00 UTC
1994-04-01359.712026-08-052026-09-07 20:00 UTC
1994-03-01359.362026-08-052026-09-07 20:00 UTC
1994-02-013592026-08-052026-09-07 20:00 UTC
1994-01-01358.482026-08-052026-09-07 20:00 UTC
1993-12-01357.862026-08-052026-09-07 20:00 UTC
1993-11-01356.962026-08-052026-09-07 20:00 UTC
1993-10-01355.712026-08-052026-09-07 20:00 UTC
1993-09-01354.472026-08-052026-09-07 20:00 UTC
1993-08-01354.442026-08-052026-09-07 20:00 UTC
1993-07-01355.732026-08-052026-09-07 20:00 UTC
1993-06-01357.352026-08-052026-09-07 20:00 UTC
1993-05-01358.382026-08-052026-09-07 20:00 UTC
1993-04-01358.422026-08-052026-09-07 20:00 UTC
1993-03-01357.962026-08-052026-09-07 20:00 UTC
1993-02-01357.542026-08-052026-09-07 20:00 UTC
1993-01-01357.22026-08-052026-09-07 20:00 UTC
1992-12-01356.742026-08-052026-09-07 20:00 UTC
1992-11-01355.992026-08-052026-09-07 20:00 UTC
1992-10-01354.812026-08-052026-09-07 20:00 UTC
1992-09-01353.572026-08-052026-09-07 20:00 UTC
1992-08-01353.662026-08-052026-09-07 20:00 UTC
1992-07-01355.182026-08-052026-09-07 20:00 UTC
1992-06-01356.872026-08-052026-09-07 20:00 UTC
1992-05-01357.832026-08-052026-09-07 20:00 UTC
1992-04-01357.762026-08-052026-09-07 20:00 UTC
1992-03-01357.262026-08-052026-09-07 20:00 UTC
1992-02-01356.892026-08-052026-09-07 20:00 UTC
1992-01-01356.542026-08-052026-09-07 20:00 UTC
1991-12-01355.952026-08-052026-09-07 20:00 UTC
1991-11-01355.162026-08-052026-09-07 20:00 UTC
1991-10-01354.012026-08-052026-09-07 20:00 UTC
1991-09-01352.932026-08-052026-09-07 20:00 UTC
1991-08-01353.062026-08-052026-09-07 20:00 UTC
1991-07-01354.532026-08-052026-09-07 20:00 UTC
1991-06-01356.182026-08-052026-09-07 20:00 UTC
1991-05-01357.112026-08-052026-09-07 20:00 UTC
1991-04-01357.192026-08-052026-09-07 20:00 UTC
1991-03-01356.692026-08-052026-09-07 20:00 UTC
1991-02-01356.192026-08-052026-09-07 20:00 UTC
1991-01-01355.762026-08-052026-09-07 20:00 UTC
1990-12-01355.192026-08-052026-09-07 20:00 UTC
1990-11-01354.452026-08-052026-09-07 20:00 UTC
1990-10-01353.192026-08-052026-09-07 20:00 UTC
1990-09-01351.792026-08-052026-09-07 20:00 UTC
1990-08-01351.582026-08-052026-09-07 20:00 UTC
1990-07-01352.72026-08-052026-09-07 20:00 UTC
1990-06-01354.322026-08-052026-09-07 20:00 UTC
1990-05-01355.412026-08-052026-09-07 20:00 UTC
1990-04-01355.512026-08-052026-09-07 20:00 UTC
1990-03-01355.22026-08-052026-09-07 20:00 UTC
1990-02-01354.872026-08-052026-09-07 20:00 UTC
1990-01-01354.482026-08-052026-09-07 20:00 UTC
1989-12-01353.912026-08-052026-09-07 20:00 UTC
1989-11-01353.042026-08-052026-09-07 20:00 UTC
1989-10-01351.852026-08-052026-09-07 20:00 UTC
1989-09-01350.562026-08-052026-09-07 20:00 UTC
1989-08-01350.212026-08-052026-09-07 20:00 UTC
1989-07-01351.562026-08-052026-09-07 20:00 UTC
1989-06-01353.272026-08-052026-09-07 20:00 UTC
1989-05-01354.192026-08-052026-09-07 20:00 UTC
1989-04-01354.382026-08-052026-09-07 20:00 UTC
1989-03-01354.012026-08-052026-09-07 20:00 UTC
1989-02-01353.462026-08-052026-09-07 20:00 UTC
1989-01-01353.012026-08-052026-09-07 20:00 UTC
1988-12-01352.462026-08-052026-09-07 20:00 UTC
1988-11-01351.612026-08-052026-09-07 20:00 UTC
1988-10-01350.442026-08-052026-09-07 20:00 UTC
1988-09-01349.272026-08-052026-09-07 20:00 UTC
1988-08-01349.12026-08-052026-09-07 20:00 UTC
1988-07-01350.282026-08-052026-09-07 20:00 UTC
1988-06-01351.762026-08-052026-09-07 20:00 UTC
1988-05-01352.462026-08-052026-09-07 20:00 UTC
1988-04-01352.292026-08-052026-09-07 20:00 UTC
1988-03-01351.852026-08-052026-09-07 20:00 UTC
1988-02-01351.472026-08-052026-09-07 20:00 UTC
1988-01-01350.912026-08-052026-09-07 20:00 UTC
1987-12-01350.212026-08-052026-09-07 20:00 UTC
1987-11-01349.252026-08-052026-09-07 20:00 UTC
1987-10-01347.972026-08-052026-09-07 20:00 UTC
1987-09-01346.72026-08-052026-09-07 20:00 UTC
1987-08-01346.612026-08-052026-09-07 20:00 UTC
1987-07-01347.842026-08-052026-09-07 20:00 UTC
1987-06-01349.462026-08-052026-09-07 20:00 UTC
1987-05-01350.262026-08-052026-09-07 20:00 UTC
1987-04-01349.982026-08-052026-09-07 20:00 UTC
1987-03-01349.282026-08-052026-09-07 20:00 UTC
1987-02-01348.572026-08-052026-09-07 20:00 UTC
1987-01-01348.012026-08-052026-09-07 20:00 UTC
1986-12-01347.762026-08-052026-09-07 20:00 UTC
1986-11-01347.32026-08-052026-09-07 20:00 UTC
1986-10-01346.032026-08-052026-09-07 20:00 UTC
1986-09-01344.862026-08-052026-09-07 20:00 UTC
1986-08-01344.922026-08-052026-09-07 20:00 UTC
1986-07-01346.292026-08-052026-09-07 20:00 UTC
1986-06-01347.762026-08-052026-09-07 20:00 UTC
1986-05-01348.322026-08-052026-09-07 20:00 UTC
1986-04-01348.222026-08-052026-09-07 20:00 UTC
1986-03-01347.712026-08-052026-09-07 20:00 UTC
1986-02-01347.342026-08-052026-09-07 20:00 UTC
1986-01-01347.112026-08-052026-09-07 20:00 UTC
1985-12-01346.552026-08-052026-09-07 20:00 UTC
1985-11-01345.792026-08-052026-09-07 20:00 UTC
1985-10-01344.642026-08-052026-09-07 20:00 UTC
1985-09-01343.372026-08-052026-09-07 20:00 UTC
1985-08-01343.412026-08-052026-09-07 20:00 UTC
1985-07-01344.922026-08-052026-09-07 20:00 UTC
1985-06-01346.262026-08-052026-09-07 20:00 UTC
1985-05-01346.782026-08-052026-09-07 20:00 UTC
1985-04-01346.942026-08-052026-09-07 20:00 UTC
1985-03-01346.642026-08-052026-09-07 20:00 UTC
1985-02-01345.82026-08-052026-09-07 20:00 UTC
1985-01-01345.352026-08-052026-09-07 20:00 UTC
1984-12-013452026-08-052026-09-07 20:00 UTC
1984-11-01344.162026-08-052026-09-07 20:00 UTC
1984-10-01342.992026-08-052026-09-07 20:00 UTC
1984-09-01342.132026-08-052026-09-07 20:00 UTC
1984-08-01342.212026-08-052026-09-07 20:00 UTC
1984-07-01343.22026-08-052026-09-07 20:00 UTC
1984-06-01344.572026-08-052026-09-07 20:00 UTC
1984-05-01345.332026-08-052026-09-07 20:00 UTC
1984-04-01345.192026-08-052026-09-07 20:00 UTC
1984-03-01344.962026-08-052026-09-07 20:00 UTC
1984-02-01344.822026-08-052026-09-07 20:00 UTC
1984-01-01344.322026-08-052026-09-07 20:00 UTC
1983-12-01343.492026-08-052026-09-07 20:00 UTC
1983-11-01342.832026-08-052026-09-07 20:00 UTC
1983-10-01341.752026-08-052026-09-07 20:00 UTC
1983-09-01340.532026-08-052026-09-07 20:00 UTC
1983-08-01340.622026-08-052026-09-07 20:00 UTC
1983-07-01342.142026-08-052026-09-07 20:00 UTC
1983-06-01343.52026-08-052026-09-07 20:00 UTC
1983-05-01343.842026-08-052026-09-07 20:00 UTC
1983-04-01343.512026-08-052026-09-07 20:00 UTC
1983-03-01343.042026-08-052026-09-07 20:00 UTC
1983-02-01342.742026-08-052026-09-07 20:00 UTC
1983-01-01342.372026-08-052026-09-07 20:00 UTC
1982-12-01341.772026-08-052026-09-07 20:00 UTC
1982-11-01340.952026-08-052026-09-07 20:00 UTC
1982-10-01339.612026-08-052026-09-07 20:00 UTC
1982-09-01338.162026-08-052026-09-07 20:00 UTC
1982-08-01338.112026-08-052026-09-07 20:00 UTC
1982-07-01339.752026-08-052026-09-07 20:00 UTC
1982-06-01341.492026-08-052026-09-07 20:00 UTC
1982-05-01342.372026-08-052026-09-07 20:00 UTC
1982-04-01342.522026-08-052026-09-07 20:00 UTC
1982-03-01342.232026-08-052026-09-07 20:00 UTC
1982-02-01341.952026-08-052026-09-07 20:00 UTC
1982-01-01341.362026-08-052026-09-07 20:00 UTC
1981-12-01340.742026-08-052026-09-07 20:00 UTC
1981-11-01340.172026-08-052026-09-07 20:00 UTC
1981-10-01339.072026-08-052026-09-07 20:00 UTC
1981-09-01337.972026-08-052026-09-07 20:00 UTC
1981-08-01338.082026-08-052026-09-07 20:00 UTC
1981-07-01339.222026-08-052026-09-07 20:00 UTC
1981-06-01340.632026-08-052026-09-07 20:00 UTC
1981-05-01341.432026-08-052026-09-07 20:00 UTC
1981-04-01341.682026-08-052026-09-07 20:00 UTC
1981-03-01341.382026-08-052026-09-07 20:00 UTC
1981-02-01340.752026-08-052026-09-07 20:00 UTC
1981-01-01340.182026-08-052026-09-07 20:00 UTC
1980-12-01339.632026-08-052026-09-07 20:00 UTC
1980-11-01338.932026-08-052026-09-07 20:00 UTC
1980-10-01337.822026-08-052026-09-07 20:00 UTC
1980-09-01337.052026-08-052026-09-07 20:00 UTC
1980-08-01337.222026-08-052026-09-07 20:00 UTC
1980-07-01338.442026-08-052026-09-07 20:00 UTC
1980-06-01339.992026-08-052026-09-07 20:00 UTC
1980-05-01340.442026-08-052026-09-07 20:00 UTC
1980-04-013402026-08-052026-09-07 20:00 UTC
1980-03-01339.62026-08-052026-09-07 20:00 UTC
1980-02-01339.262026-08-052026-09-07 20:00 UTC
1980-01-01338.582026-08-052026-09-07 20:00 UTC
1979-12-01337.892026-08-052026-09-07 20:00 UTC
1979-11-01337.362026-08-052026-09-07 20:00 UTC
1979-10-01336.362026-08-052026-09-07 20:00 UTC
1979-09-01335.022026-08-052026-09-07 20:00 UTC
1979-08-01334.362026-08-052026-09-07 20:00 UTC
1979-07-01335.562026-08-052026-09-07 20:00 UTC
1979-06-01337.382026-08-052026-09-07 20:00 UTC
1979-05-01338.262026-08-052026-09-07 20:00 UTC
1979-04-01338.322026-08-052026-09-07 20:00 UTC
1979-03-01337.882026-08-052026-09-07 20:00 UTC
1979-02-01337.292026-08-052026-09-07 20:00 UTC
1979-01-01336.562026-08-052026-09-07 20:00 UTC
1 geographies have observations for this metric
NOAA, NOAA NCEI access data service, series gml:co2_mm_gl
Definition

What this measures

Monthly mean of the globally averaged marine surface CO2 mole fraction in dry air (ppm) from the NOAA GML cooperative air sampling network, the 'average' column of co2_mm_gl.csv. Includes the seasonal cycle; NOAA's deseasonalized 'trend' value is kept in metadata. Series begins January 1979.

Direction
lower is better
Geography level
world
Slug
co2-global-monthly-mean
Environment & Regeneration

Related metrics

Provenance and methodologysource, series, ingestion, revisions
Classification
Observedpublished by the cited source, ingested without transformation
Source organization
NOAA, NOAA NCEI access data service
Series ID
gml:co2_mm_gllast fetch: ok
Source links
License and attribution
Approved with attribution
NOAA National Centers for Environmental Information.
Last source update
2026-08-05(source revision label as published by the provider)
Last ingestion
last successful runfresh
Last run
success2026-09-07 20:16 UTC
Parser version
noaa-gml-ncei/1.0.0
Methodology version
1.0
Quality and confidence
The most recent year is preliminary pending recalibration of reference gases; NOAA revises it in place and occasionally earlier years. Each revision is stored as a new row labelled with the file creation date. Cite Lan, X., Tans, P. and K.W. Thoning, NOAA Global Monitoring Laboratory (gml.noaa.gov/ccgg/trends/).
Ingestion rejects values outside 250 to 1,000 ppm.
569 periods with values for this geography, 1979-01-01 to 2026-05-01.
Revisions
Values reported for the latest period (2026-05-01) by each source revision ingested. Earlier rows are never deleted; the newest ingested row is shown as current.
Source revisionValue (ppm)Ingested atStatus
2026-08-05428.732026-09-07 20:00 UTCcurrent
No superseded rows for this geography: every period has been ingested once.