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Record-Breaking CO2 Levels Commit Planet to More Severe Climate Change

Strategic Insights

— 2 min read

A new report from the World Meteorological Organization (WMO) reveals that carbon dioxide levels in the atmosphere have soared by a record amount in 2024, committing the planet to more long-term temperature increase. The WMO Greenhouse Gas Bulletin attributes the surge to continued emissions of CO2 from human activities and an upsurge from wildfires, as well as reduced CO2 absorption by land ecosystems and the ocean. This vicious climate cycle threatens to accelerate global warming, with the global average concentration of CO2 surging by 3.5 ppm from 2023 to 2024, the largest increase since modern measurements started in 1957.

Key Takeaways:

  • The global average concentration of CO2 soared by 3.5 ppm from 2023 to 2024, the largest increase since modern measurements started in 1957.
  • The WMO attributes the surge to continued emissions of CO2 from human activities and an upsurge from wildfires, as well as reduced CO2 absorption by land ecosystems and the ocean.
  • The growth rate of CO2 has tripled since the 1960s, accelerating from an annual average increase of 0.8 ppm per year to 2.4 ppm per year in the decade from 2011 to 2020.
  • Concentrations of methane and nitrous oxide, the second and third most important long-lived greenhouse gases related to human activities, have also risen to record levels.
  • The globally averaged methane concentration in 2024 was 1942 parts per billion (ppb), an increase of 166% above pre-industrial (before 1750) levels.
  • The globally averaged concentration of nitrous oxide in 2024 was 338.0 ppb, an increase of 25% over the pre-industrial level.
  • WMO Deputy Secretary-General Ko Barrett emphasizes that reducing emissions is essential not just for climate security but also for economic security and community well-being.
  • Oksana Tarasova, coordinator of the Greenhouse Gas Bulletin, highlights the importance of sustained and strengthened greenhouse gas monitoring to understand the loops in the climate system.

Statistics:

  • The annual average level of CO2 measured by WMO's Global Atmosphere Watch network of monitoring stations was 377.1 ppm in 2004, while in 2024 it was 423.9 ppm.
  • The globally averaged growth rate of CO2 has accelerated from an annual average increase of 0.8 ppm per year to 2.4 ppm per year in the decade from 2011 to 2020.
  • The largest increase in CO2 levels since modern measurements started in 1957 was 3.5 ppm from 2023 to 2024.
  • The globally averaged methane concentration in 2024 was 1942 ppb, an increase of 166% above pre-industrial levels.
  • The globally averaged concentration of nitrous oxide in 2024 was 338.0 ppb, an increase of 25% over the pre-industrial level.

Sources:

  • World Meteorological Organization (WMO)
  • World Data Centre for Greenhouse Gases (WDCGG) at the Japan Meteorological Agency
  • United Nations Environment (UN Environment) - Emissions Gap Report (scheduled for release on 4 November)
  • UN Climate Change conference in November
  • COP 30 meeting in Belem, Brazil

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