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View Diary: Why Cold Weather Does Not Disprove Global Warming (67 comments)

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  •  Here's another visual aid (0+ / 0-)

    Go the Arbor Day Foundation website and find the hardiness zone map in the Media section. http://www.arborday.org/...  Go to "See an animation" and click on that. They also have a section on Climate Change  http://www.arborday.org/...
     The USDA is supposed to issue an updated map every ten years, but hadn't since 1990 (I suppose due to opposition from the Bush administration), so in 2006 the Arbor day Foundation did their own update. You can toggle between the 1990 and 2006 maps and see the warmth creeping north. These maps depict the thirty-year average winter lows in an area. The bands are defined by a range of ten degrees Fahrenheit. These maps are used to help determine what plants will survive the winter in a given area. A map of summer average highs would look somewhat different, but in most areas the zones of such a map would also be creeping north. At some point a given plant will also find it too hot to grow.

    The man who worries morning and night about the dandelions in the lawn will find great relief in learning to love the dandelions. Liberty Hyde Bailey, 1910

    by Grainpaw on Tue Jan 07, 2014 at 04:43:21 PM PST

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