Reuters: Climate scientists struggle to explain warming slowdown

Climate scientists struggle to explain warming slowdown

OSLO (Reuters) - Scientists are struggling to explain a slowdown in climate change that has exposed gaps in their understanding and defies a rise in global greenhouse gas emissions.

Often focused on century-long trends, most climate models failed to predict that the temperature rise would slow, starting around 2000. Scientists are now intent on figuring out the causes and determining whether the respite will be brief or a more lasting phenomenon.
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Theories for the pause include that deep oceans have taken up more heat with the result that the surface is cooler than expected, that industrial pollution in Asia or clouds are blocking the sun, or that greenhouse gases trap less heat than previously believed.
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"The climate system is not quite so simple as people thought," said Bjorn Lomborg, a Danish statistician and author of "The Skeptical Environmentalist" who estimates that moderate warming will be beneficial for crop growth and human health.
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"My own confidence in the data has gone down in the past five years," said Richard Tol, an expert in climate change and professor of economics at the University of Sussex in England.
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The IPCC will seek to explain the current pause in a report to be released in three parts from late 2013 as the main scientific roadmap for governments in shifting from fossil fuels towards renewable energies such as solar or wind power, the panel's chairman Rajendra Pachauri said.
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Pachauri said climate change can have counter-intuitive effects, like more snowfall in winter that some people find hard to accept as side-effects of a warming trend.