Apr 19 2007
Global Aerosol Concentration Changes
I guess it’s been a couple weeks since I first saw this “image” of the reduction of global aerosol optical thickness. If you’re not signed up to get the weekly email, I’d recommend it. They have some pretty cool pictures on there.
Aerosol Blanket Likely Thinned During 1990s
Each day, a blanket of tiny particles drifting through the Earth’s atmosphere filters out some of the sunlight headed for the planet’s surface. These aerosols, including dust, smoke, and human-produced pollution, can reflect incoming light or absorb it, directly affecting the Earth’s energy balance and climate. Aerosols also influence the climate indirectly, by affecting the brightness and amount of clouds.
The EO article linked to above gives a nice general overview, if you need something a bit deeper, see Global ‘Sunscreen’ Has Likely Thinned, and if you want the original, see the original paper in Science Long-Term Satellite Record Reveals Likely Recent Aerosol Trend by Mishchenko et.al.
Mishchenko, M., Geogdzhayev, I., Rossow, W., Cairns, B., Carlson, B., Lacis, A., Liu, L., and Travis, L. (2007). Long-Term Satellite Record Reveals Likely Recent Aerosol Trend. Science, 315, 1543.
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