Marine Cloud Brightening
MARINE CLOUD BRIGHTENING Authors:- John Latham1,4 , Keith Bower4 , Tom Choularton4 , Hugh Coe4, Paul Connelly4 , Gary Cooper7 ,Tim Craft4, Jack Foster7, Alan Gadian5, Lee Galbraith7 Hector Iacovides4 , David Johnston7 , Brian Launder4, Brian Leslie7 , John Meyer7, Armand Neukermans7, Bob Ormond7, Ben Parkes5 , Phillip Rasch3, John Rush7, Stephen Salter6, Tom Stevenson6, Hailong Wang3, Qin Wang7 & Rob Wood2 . Affiliations:- 1 National Centre for Atmospheric Research, Boulder, CO. 2 U Washington, Seattle, 3 PNNL, Richland, WA., 4 U Manchester, 5 U of Leeds, 6 U of Edinburgh, 7 Silver Lining, CA. Abstract The idea behind the marine cloud brightening (MCB) geoengineering technique is that seeding marine stratocumulus clouds with copious quantities of roughly monodisperse sub-micrometre seawater particles could significantly enhance the cloud droplet number concentration thus increasing the cloud albedo and longevity – thereby producing a cooling, which computations suggest could be adequate to balance the warming associated with a doubling of atmospheric carbon dioxide. We review herein recent research on a number of critical issues associated with MCB: (1) general circulation model (GCM) studies, which are our primary tools to evaluate globally the effectiveness of marine cloud brightening and to assess its climate impacts on rainfall amounts and distribution, as well as on polar sea-ice cover and thickness: (2) high resolution modeling of the effects of seeding on marine stratocumulus, which are required to understand the complex array
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