Why is it in the news?
- Greenhouse Gas Bulletin was recently released by the World Meteorological Organization (WMO).
- The Greenhouse Gas Bulletin is based on data from the WMO Global Atmosphere Watch (GAW) Programme.
- GAW provides information on atmospheric composition through a global network of observation stations and scientific infrastructure.
Greenhouse Gas Levels
- Global average CO2 concentrations reached 417.9 ppm (parts per million) in 2022. This represents a 150% increase from pre-industrial levels (before the year 1750).
- Methane (CH4) concentrations increased by 264%, and Nitrous Oxide (N2O) concentrations increased by 124% from pre-industrial levels in 2022.
Radiative Forcing Changes
- Radiative forcing by long-lived greenhouse gases (LLGHGs) like CO2, CH4, and CFCs increased by 49% from 1990 to 2022. CO2 accounted for about 78% of this increase in radiative forcing.
Challenges in Addressing GHGs
- Feedback Mechanism: Climate change is influenced by feedback loops, including increased carbon emissions from soils and reduced carbon uptake by oceans and forests.
- Tipping Points: Climate may reach tipping points, triggering self-accelerating and potentially irreversible changes.
- Natural Variability: CO2, CH4, and N2O levels vary due to natural processes such as El Niño.
- Radiative Forcing by Long-Lived GHGs: Radiative forcing measures the impact of these gases on the Earth’s energy balance. Greenhouse gases trap heat, preventing it from escaping into space and causing the planet to warm up.
|About WMO (World Meteorological Organization)|
· WMO is a specialized agency of the United Nations (UN).
· Headquarters: Geneva, Switzerland.
· Established in 1950.
· It has 187 Member States, including India, and 6 Member Territories.