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Increase in Large Earthquakes Expected Globally in 2018 as Earth’s Rotation Slows
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CLIMATECHANGE-ARCTIC-e1494276898548

‘Totally Unexpected’ Source Of Climate Cooling Discovered by Scientists

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Arctic waters absorbed vast amounts of carbon dioxide from the atmosphere, creating a cooling effect that’s 230 times greater than the warming from methane emitted from underwater seeps, according to a new study.

The findings are a complete reversal of what scientists previously believed — that methane seeps in the Arctic Ocean were contributing to global warming.

“If what we observed near Svalbard occurs more broadly at similar locations around the world, it could mean that methane seeps have a net cooling effect on climate, not a warming effect as we previously thought,” John Pohlman, a U.S. Geological Survey biochemist and lead author of the study, said in a statement Monday.

If the results hold, Pohlman’s study could have big implications for how scientists calculate the global carbon “budget” and for future projections of global warming.

“This is … totally unexpected,” Brett Thornton, a Swedish geochemist who was not involved in the study, told Science Magazine.

A group of U.S., German and Norwegian scientists measured methane and carbon dioxide concentrations off Svalbard’s coast. They found 2,000 times more carbon dioxide was taken out of the atmosphere than methane escaping from underwater vents.

Methane escaping margin seeps at depths of 260 to 295 feet appeared to stimulate marine phytoplankton, which may have increased their intake of carbon dioxide. The study “suggests physical mechanisms that transport methane to the surface may also transport nutrient-enriched water that supports enhanced primary production and CO2 drawdown.”

“These findings challenge the widely held perception that areas characterized by shallow-water methane seeps and/or strongly elevated sea−air methane flux always increase the global atmospheric greenhouse gas burden,” reads the study’s executive summary.

Pohlman cautioned the “cooling effect” of the seeps may be limited to certain times of the year, but he and his team were astounded to find such low amounts of methane above the seeps.

These areas of methane seepage may be net greenhouse gas sinks,” reads a summary of the work.

Methane is a more potent gas than carbon dioxide, and scientists have become increasingly worried about “methane bomb” from thawing permafrost and warming oceans. Methane hydrates from the ocean floor “a key cause of the global warming that led to one of the largest extinctions in the earth’s history,” Ryo Matsumoto, a University of Tokyo professor, said in 2008.

Scientists worry a huge release of methane from the sea floor could cause massive amounts of warming. One 2016 study warned “the release of methane from hydrate may be apocalyptic.”

But Pohlman’s research suggests there’s a lot more to learn about methane seeps and their role in global greenhouse gas inventories.

Pohlman’s study was the first to observe this in methane-rich waters, but the implications for climate science could be big if results can be replicated at other methane seeps.

“We are looking forward to testing the hypothesis that shallow-water methane seeps are net greenhouse gas sinks in other locations,” Pohlman said.

Michael Bastasch
The Daily Caller


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EDITOR’S STRONGLY RECOMMENDED READ

Increase in Large Earthquakes Expected Globally in 2018 as Earth’s Rotation Slows
IF YOU HAVEN'T READ THIS PLEASE DO SO AND PERHAPS EVEN TAKE SOME STEPS TO PREPARE SOME TYPE OF PRECAUTIONARY EMERGENCY PLAN BEFORE THE NEW YEAR SO YOU CAN BE PREPARED IN THE EVENT THAT THIS WERE TO HAPPEN IN YOUR AREA.

DID YOU KNOW…

Only one person in two billion will live to be 116 or older.
*UPDATED WEEKLY
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