It seems that #GlobalDimming was reduced during the #Pandemic and #lockdowns due to reductions in pollution 🤔
Global Dimming partly mitigates {and had mitigated historically) Global Warming and Climate Change due to increased cloud cover caused by pollution.
https://www.sciencedaily.com/releases/2021/02/210202164535.htm
The lockdowns and reduced societal activity related to the COVID-19 pandemic affected emissions of pollutants in ways that slightly warmed the planet for several months last year, according to new research. The counterintuitive finding highlights the influence of airborne particles, or aerosols, that block incoming sunlight.
@Fabolo @sergiodomeyko @MichaelEMann
Ar6-workgroup1 has a section on #aerosols or what people call #globaldimming.
There's a chart showing world regions and their respective amount and their evolution of aerosol-induced cooling. The most cooling came from Europe, US is 2nd. Both have long ago enacted clean-air acts to fight acid rain. There's not much left in the pipeline from the other regions.
But the cooling from Europe's and North Anerica's air pollution also drove Africa's rain band south which caused droughts and famines and genocides in the 80s...That geoengineered change has been reversed by now, but it took decades - and we didn't even know until recently that we were responsible for what happened in Africa.
It's a really good chart, I think. Have a look on the IPCC website.
It's Figure 6.15 here https://www.ipcc.ch/report/ar6/wg1/figures/chapter-6
It helps to read the section in chapter 6, too.
https://threadreaderapp.com/thread/1604577862434136074.html
The #ClimateCatastrophe and the #SixthExtinction are already much worse than most of us think. Not only won't we stay under +1.5°C of warming, we won't even stay below +2.0°C. If we continue what we're doing right now, we will exceed +2.5°C, and if #GlobalDimming is really as underestimated as that paper linked in Ben See's Twitter thread suggests, we might even exceed +4.0°C.
"In a study published [in 1999] in the prestigious peer review journal Science, Professor Daniel Rosenfeld of The Hebrew University of Jerusalem’s Institute of Earth Sciences argued that aerosol particles play a far greater role in cooling the earth than had been previously thought. This means that the true extent of global warming, masked by pollutants, has also been under-estimated. Other scientists have verified Rosenfeld’s concerns ..."
https://www.politicalcompass.org/counterpoint-20200419-global-dimming
Rupert Rivett
Berliner Pflanze
Simon Zerafa
anlomedad
Lord Caramac the Clueless, KSC
Strypey