Study: Causes of Calif. drought are natural, not man-madeWhen the Narrative goes bad, then blame them for not using the old Narrative instead.
"Natural weather patterns, not man-made global warming, are causing the historic drought that's parching California, says a study out Monday from federal scientists.
"It's important to note that California's drought, while extreme, is not an uncommon occurrence for the state," said Richard Seager, the report's lead author and professor with Columbia University's Lamont Doherty Earth Observatory.
The report was sponsored by the National Oceanic and Atmospheric Administration. It did not appear in a peer-reviewed journal but was reviewed by other NOAA scientists.
"In fact, multi-year droughts appear regularly in the state's climate record, and it's a safe bet that a similar event will happen again," Seager said.
The persistent weather pattern over the past several years has featured a warm, dry ridge of high pressure over the eastern north Pacific Ocean and western North America. Such high-pressure ridges prevent clouds from forming and precipitation from falling.
The latest study notes that this ridge — which has resulted in decreased rain and snowfall since 2011 — is almost opposite to what computer models predict would result from human-caused climate change.
The NOAA report shows that mid-winter precipitation is actually projected to increase because of human-caused climate change over most of the state. Seager said a low-pressure system, not a high-pressure system, would likely form off the California coast because of climate change.
Low pressure creates clouds and precipitation.
Some outside climate scientists criticized the report, saying it didn't take into effect how record warmth worsened the drought."
Monday, December 8, 2014
...for warmists. California's drought is a common, multiyear event, and not a product of global warming, say NOAH scientists: