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Fight Global Warming With Manmade Seawater Particles
New results from modeling clouds like those seen in shipping lanes reveal the complex interplay between aerosols, the prevailing weather and even the time of day the aerosol particles hit the air, according to the research.
"We've seen ship tracks affect the reflectivity of clouds," said Phil Rasch, chief climate scientist at the Department of Energy's Pacific Northwest National Laboratory in Richland, Washington.
"We want to know if we can do the same thing when we want to, on purpose, and how that might be helpful in countering some of the effects of global warming," he added.
"We decided to see how the reflectivity of clouds is influenced by particles in a very detailed model that treats clouds much more realistically than we are able to do in a typical climate model," he said.
Previous work analyzing clouds in shipping lanes showed that large ships spewing tiny particles into the sky change the characteristics of clouds.
More aerosol particles - tiny natural or manmade bits of dirt, water and gas, such as from pollution - increase the number of droplets in clouds and make each droplet smaller.
This reflects more sunlight from the surface, and the clouds appear brighter.
But the previous work revealed that some parts of the clouds above shipping lanes became brighter and other parts darker, suggesting that using aerosols to increase cloud reflectivity will be more complex than simply adding more.
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