It is clear that the steady increase in atmospheric CO2 is the number one contributor to global warming, but what is number two?
A four-year assessment by an international panel has determined that black carbon (soot) is the number two contributor.
The soot particles of smoke and smog, otherwise known as black carbon was found to contribute about two times more to global warming than previous estimates.
Black carbon cloud droplets.
Excerpt from the University of Washington news.......... Black carbon’s role in climate is complex. Dark particles in the air work to shade the Earth’s surface while warming the atmosphere. Black carbon that settles on the surface of snow and ice darkens the surface to absorb more sunlight and increase melting. Finally, soot particles influence cloud formation in ways that can have either a cooling or warming impact.
Black carbon deposits on the Himalayan Range.
The good news is that black carbon only stays in the atmosphere for only a few days, so that reducing these emissions can yield much more immediate results compared to atmospheric CO2, which has a half-life of 100 years.
The researchers found that reducing emissions from diesel engines followed by replacing some wood and coal burning household stoves would have the greatest immediate cooling impact when it comes to black carbon.
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March 2018 ranked as the sixth warmest March on record while Arctic sea ice continues to run well below normal.
The Atlantic Meridional Overturning Circulation (AMOC) has slowed down since the mid-20th century.
High tide coastal flooding has become much more common along the U.S. East Coast over the last 20 years.
The annual maximum Arctic sea ice extent will end up being the second lowest in the satellite record
Extreme winter weather is two to four times more likely to occur in the eastern U.S. when the Arctic is abnormally warm versus abnormally cold.
Warmer and wetter summers may cause some unexpected negative impacts in the near future