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GGB presents the latest analysis of observations from the WMO Global Atmosphere Watch (GAW) Programme on concentrations of long-lived greenhouse gases (LLGHGs) in the atmosphere.
- WMO's GAW Programme monitors atmospheric composition changes and helps to understand interactions between air, oceans, and Earth's biosphere.
About GGB
- It compares current global carbon dioxide (CO2), Methane (CH4), and Nitrous oxide (N2O) levels with last years and pre-industrial level (before year 1750).
- It also provides insights on Radiative forcing changes by LLGHGs like CO2, CH4, and CFCs.
- CO2, CH4 and N2O, together with dichlorodifluoromethane (CFC-12) and trichlorofluoromethane (CFC-11), account for approximately 96% of radiative forcing.
Key observations of the report
- GHGs concentration: The globally-averaged surface concentration of CO2, CH4 & N2O (in 2023), are 151%, 265% and 125% of pre-industrial (before 1750) levels.
- Radiative forcing (1990 to 2023): By long-lived LLGHGs increased by 51.5%, with CO2 accounting for about 81%.
- Atmospheric methane (CH4): It saw its largest 3-year increase on record, driven by higher emissions from natural wetlands due to climate change.
- Climate change: It could make ecosystems release more greenhouse gases, wildfires emit more CO2, and oceans absorb less, amplifying global warming and ocean acidification.
About Radiative forcing by long-lived GHGs
About WMO:
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