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A group of researchers claim to have found evidence that cosmic rays from exploding stars can interact with small aerosols to seed clouds, impacting global climate.
“Finally we have the last piece of the puzzle explaining how particles from space affect climate on Earth,” said Henrik Svensmark of the Technical University of Denmark, the study’s lead author.
Svensmark - Study - Results - Climate - Models
Svensmark said his study’s results should be incorporated in global climate models, and the scientist even suggested his results imply carbon dioxide are having less of an impact on global climate than most scientists believe.
“It gives an understanding of how changes caused by Solar activity or by super nova activity can change climate,” Svensmark said in a statement.
Climate - Scientists - Study - Climate - Scientist
But climate scientists are pushing back on the study. Climate scientist Zeke Hausfather argued there’s been an increase in cosmic rays, but no corresponding cooling.
NASA’s Gavin Schmidt went on a Twitter rant, saying Svensmark isn’t taken seriously in the science community. Schmidt also said solar forcing on the climate peaked in the 1950s.
Svensmark - Study - Chamber - Experiments - Arguments
Svensmark’s study, which relied on cloud chamber experiments and theoretical arguments, found solar activity plays a much bigger role in controlling the Earth’s climate than previously thought.
Scientists previously dismissed the idea that tiny aerosols could turn into cloud condensation nuclei since there was no known mechanism by which this could occur. But the study found small aerosols interact with cosmic rays and form clouds.
Periods - Activity - Rays - Earth - Atmosphere
During periods of low solar activity, more cosmic rays pass through the Earth’s atmosphere and seed...
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