New study: ‘…climate system is only about half as sensitive to increasing CO2 as previously believed’

New Paper by Roy Spencer, showing C02 sensitivity is much lower when ENSO variability is factored into models.

Watts Up With That?

Warming since 1950s partly caused by El Niño

HUNTSVILLE, Ala. (Nov. 11, 2013) – A natural shift to stronger warm El Niño events in the Pacific Ocean might be responsible for a substantial portion of the global warming recorded during the past 50 years, according to new research at The University of Alabama in Huntsville (UAH).

“Our modeling shows that natural climate cycles explain at least part of the ocean warming we’ve seen since the 1950s,” said Dr. Roy Spencer, a principal research scientist in UAH’s Earth System Science Center and the new study’s lead author. “But we also found that because the globe has had more frequent La Niña cooling events in the past ten or fifteen years, they are canceling out some of the effects of global warming.”

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