In preparation for COP28, the World Meteorological Organization (WMO) has published its annual Greenhouse gas (GHG) bulletin. The WMO stated that GHGs has recorded a new high in 2022, and that it continues to rise.
The growth rate of CO2 concentrations was somewhat lower in 2022. Experts refer this to the effects of La Nina’s rare occurrence of “triple-dip” which resulted in increased absorption of CO2 by earth and ocean. The growth rate of methane was slightly lower in 2021-2022 than in previous years, but higher than the ten-year average. Nitrous oxide levels recorded their highest year-on-year increase in 2021-22.
These new records indicate that global temperatures are increasing and exceeding the targets set by the Paris Agreement. Urgent and substantial reductions in fossil fuel consumption are necessary to address this.
The radiative forcing, a measure of the warming effect caused by GHGs, increased by 49pc from 1990 to 2022, with CO2 contributing approximately 78pc of this rise. Despite numerous warnings from the scientific community and extensive climate-related efforts, the WMO states that the global direction remains problematic.