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January 08, 2018

New Method for Determining Historical Earth Temperature Finds That Earth Warmed... Only 0.1 Degree Celsius Over Past 50 Years

Science, unsettled.

Ocean temperatures have risen only 0.1 degree Celsius over the last five decades, according to a landmark study some scientists argue could change the way researchers measure the ocean's temperature levels.

Each layer of water in the ocean has vastly different temperatures, so determining the average temperature is nearly impossible without glossing over important data. Researchers at the University of California, San Diego decided on a different model – they measured the ratio of noble gases in the atmosphere, which are in direct relation to the ocean's temperature.

Geoscientist Jeff Severinghaus, an academic at Scripps Institution of Oceanography, measured values of the noble gases argon, krypton, and xenon in air bubbles captured inside ice cores in Antarctica. Krypton and xenon are released into the atmosphere in known quantities as the ocean warms, according to the study, which was published Thursday in Nature Journal

"This method is a radically new way to measure change in total ocean heat," Severinghaus said in a post on the Scripps website. "It takes advantage of the fact that the atmosphere is well-mixed, so a single measurement anywhere in the world can give you the answer."

Severinghaus measured values of the noble gases argon, krypton, and xenon in air bubbles captured inside ice cores in Antarctica. Krypton and xenon, which are remarkably stable regardless external factors, are released into the atmosphere in known quantities as the ocean warms.

Assuming that they're right that the concentration of these trace gasses is directly proportional to atmospheric heat, this seems to be, for once, an actually accurate method of discovering historical global climate changes.


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posted by Ace at 04:19 PM

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