Source: Science News for Students
Context: According to the World Meteorological Organization’s (WMO) Global Carbon Project, during the COVID-19 shutdown, daily CO2 emissions may have been reduced, but it's not sufficient to dent global warming.
More on the news: According to the preliminary estimates by the WMO, the annual global carbon dioxide (CO2) emission reduced 4.2-7.5 percent in 2020.
According to the estimate report:
- At the global scale, an emissions reduction at this scale will not cause atmospheric CO2 to go down. CO2 will continue to go up, though at a slightly reduced pace (0.08-0.23 ppm per year lower).
- The natural inter-annual variability in CO2 emission is 1 part per million (ppm). It means the impact of the pandemic on CO2 reduction is not significant and not even higher than the natural variability figure.
- This means that on the short-term the impact of the COVID-19 confinements cannot be distinguished from natural variability.
- The Earth’s atmosphere has a heavy concentration of GHGs including CO2. The temporary reduction in emission due to the pandemic would not curb global warming and resultant climate change.