For one thing, better estimates of
ocean cloud cover explain only about half of the variation in climate sensitivity estimates.
The Nature study suggests that global warming will mix growing amounts of higher, drier air
with ocean clouds over the course of the century, thinning out the clouds and reducing their cooling effect.
«Southern
Ocean clouds play a large role in the global climate, and hopefully this will help us get a better sense of how sensitive the Earth is to greenhouse gases,» said Burrows.
A decline
in ocean cloud cover projected in climate models points to more than 5.6 °F (3 °C) of global warming coming in this century, on the high end of past global warming estimates, warn climate scientists in a new study.
In the study, the researchers looked
at ocean clouds, which at low altitudes reflect sunlight and lead to cooler global temperatures.
In a 150 - year climate simulation, researchers expected that heat radiating off of West African dust would
reduce ocean cloud cover.
Important to the Southern Hemisphere's atmospheric and oceanic circulation, understanding
Southern Ocean clouds is also important to helping determine how sensitive Earth is to the accumulation of greenhouse gases in its atmosphere.
In the second category — schemes designed to reduce the amount of sunlight reaching Earth — proposals include firing sulphate aerosols into the stratosphere to reflect sunlight back to space; using unmanned ships to increase above -
ocean cloud cover by spraying sea water into the air; painting the world's roofs white to increase reflectivity; and even floating thousands of tiny mirrors in space between Earth and the sun.
Aside from aerosol solutions, and
ocean clouds a la Latham and Salter, I think an essential will be capturing waste organics (mostly farm debris, corn stalks etc.) and sequestering them in the deep ocean (not as CO2; just drop bales; much cheaper and efficient).