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Cold ... for Southern California
On 12/20/2015 1:08 PM, David E. Ross wrote:
This morning, I saw frost on my neighbors' roofs as late as 8:30am. "Winter chill" is the number of hous the termperature is at or below 45F. I generally measure from 1 November to 31 March. The average for my area is about 330 hours. Two years ago, however, we got only 127 hours. Last year it was only 102 hours with the first chill occuring late on Christmas day. This year seems to be reverting back to normal. Our first chill was in mid-November. So far, we have had over 50 hours of chill. Just because we are having a normally cold winter does not mean there is no human-induced climate change. "One swallow does not make a summer." (Aristotle) December is not completely over yet, but we have had more winter chill November-December (113 hours) than we had entire last winter November-March (102 hours). By Friday (New Year Day), we might even exceed the winter two years ago (127 hours). Yes, I know that winter does not start in November and is over before the end of March. But my garden responds to chill that occurs from the start of November until the end of March. -- David E. Ross Climate: California Mediterranean, see http://www.rossde.com/garden/climate.html Gardening diary at http://www.rossde.com/garden/diary |
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