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Cleaning Up Air Pollution May Strengthen Global Warming

Posted by Martin C. Fox on January 22, 2018

Uh Oh! Someone forgot that the science is settled!

Using Algorean obfuscation to keep that grant money rolling in.

What about solar cooling and low sunspot activity?

https://www.scientificamerican.com/article/cleaning-up-air-pollution-may-strengthen-global-warming/

Pollution in the atmosphere is having an unexpected consequence, scientists say—it’s helping to cool the climate, masking some of the global warming that’s occurred so far.

That means efforts worldwide to clean up the air may cause an increase in warming, as well as other climate effects, as this pollution disappears…

Scientists have long known that some types of pollution can actually help cool the climate. Certain aerosols—sulfate, for instance—can reflect sunlight away from the Earth or enhance sun-reflecting cloud cover. As nations around the world have begun to crack down on air pollution, scientists have grown interested in figuring out how much extra warming might be expected as they disappear. This is critical information for strategizing ways to meet global climate goals, like the 2-degree target.

The new study relied on four global climate models, which the researchers used to simulate the effects of removing all human-caused emissions of the major aerosols, including sulfate and carbon-based particles like soot. The resulting global warming, they concluded, would be anywhere from 0.5 to 1.1 degrees Celsius.

Are these the same climate models that don’t work right according to the climategate emails?-MCViewPoint

The Intergovernmental Panel on Climate Change has established a number of possible future climate trajectories, assuming different levels of climate mitigation efforts and greenhouse gas emissions. It has accounted for future aerosol reductions in all of these scenarios, Samset noted, but with very little variation in the amount of reduction assumed.

Looks like the answer is yes, maybe-MCViewPoint

Collectively, the research indicates that greenhouse gas emissions have had an even greater effect on the climate so far than it appears—it’s just that part of it has been obscured by the presence of air pollution. As the air gets cleaner, those masked effects will start to make themselves known.

“I think we need to have more variety in those projections, since even matching up the real world today with the emissions projections from 2000 that we used last time shows a significant mismatch,” said Schmidt, the NASA scientist (who was not involved with the new research), in an email to E&E News.

What remains clear, though, is that the full extent of human-caused global warming is still revealing itself—and the future may be more severe than the past would seem to suggest.

Be seeing you

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I am not a number. I am a free man!-Number 6

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