PRESS RELEASE, 28 October 2024

Greenhouse gas levels surged to a new record in 2023, committing the planet to rising temperatures for many years to come, according to a report from the World Meteorological Organization (WMO). Carbon dioxide (CO2) is accumulating in the atmosphere faster than any time experienced during human existence, rising by more than 10% in just two decades.

Key messages
• CO2 concentrations have increased 11.4 % in just 20 years
• Long lifetime of CO2 in atmosphere locks in future temperature increase
• El Niño and vegetation fires fuel surge in later part of 2023
• Effectiveness of carbon sinks like forests cannot be taken for granted
• Improved understanding of carbon-climate feedbacks is needed
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As long as emissions continue, greenhouse gases will continue accumulating in the atmosphere leading to global temperature rise. Given the extremely long life of CO2 in the atmosphere, the temperature level already observed will persist for several decades even if emissions are rapidly reduced to net zero.

The last time the Earth experienced a comparable concentration of CO2 was 3-5 million years ago, when the temperature was 2-3°C warmer and sea level was 10-20 meters higher than now.
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The World Meteorological Organization (WMO) is a specialized agency of the United Nations responsible for promoting international cooperation in atmospheric science and meteorology.
WMO monitors weather, climate, and water resources and provides support to its Members in forecasting and disaster mitigation. The organization is committed to advancing scientific knowledge and improving public safety and well-being through its work.

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