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Another Piece of the Arctic Climate Puzzle November 14, 2007

Posted by tkcollier in Enviroment, In The News, Science & Technology.
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JPL.NASA.GOV: News Releases
A team of NASA and university scientists has detected an ongoing reversal in Arctic Ocean circulation triggered by atmospheric circulation changes that vary on decade-long time scales. The results suggest not all the large changes seen in Arctic climate in recent years are a result of long-term trends associated with global warming.

Reporting in Geophysical Research Letters, the authors attribute the reversal to a weakened Arctic Oscillation, a major atmospheric circulation pattern in the northern hemisphere. The weakening reduced the salinity of the upper ocean near the North Pole, decreasing its weight and changing its circulation.

–> “Our study confirms many changes seen in upper Arctic Ocean circulation in the 1990s were mostly decadal in nature, rather than trends caused by global warming,” said Morison.

Comments»

1. North Pole Still Melting « Terryorisms - August 28, 2008

[…] Other authors claim that this is a normal Decadal Arctic Oscillation. […]


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