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A Better Picture of Clouds

Capturing the effects of pollution bits on clouds and climate

February 2012
Results: Some of us look at clouds and see animal shapes. Scientists are looking beyond. For the first time, a team of scientists led by Pacific Northwest National Laboratory used actual measurements of clouds and the atmosphere in the polluted skies over southeast China to evaluate an oft-used climate model. They wanted to see how well the model describes the effect of tiny particles from pollution on clouds, and how those clouds influence precipitation. They found that the fast, affordable cloud microphysical calculations under-predict the precipitation they know from observations and from detailed but expensive calculations.

Gauging Water's Future

Earth system model tested to estimate watershed runoff

February 2012
Results: Scientists at Pacific Northwest National Laboratory, the Chinese Academy of Sciences and Oak Ridge National Laboratory found ways to improve the capabilities of a land model within global and regional Earth system models to estimate water runoff. Accurate runoff predictions can lead to better information for managing sustainable water for personal and industrial consumption. As it was tested, the original model produced runoff variations that are not realistic when compared to observations. The team identified several methods to improve the simulations, mainly by improving how the below-surface runoff is estimated.

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