Study: weather patterns affect frost timing more than global warming

Watts Up With That?

From the UNIVERSITY OF UTAH

Weather patterns’ influence on frost timing

Air circulation affects frost more than global warming — for now

May 23, 2017– Gardeners know the frustration of a false spring. Coaxed outside by warm weather, some people plant their gardens in the spring only to see a sudden late frost strike at the plants with a killer freezer burn. Grumbling green thumbs, along with farmers and water supply managers, would benefit from more accurate predictions of the first and last frosts of the season.

This image shows the average day of the year with the last spring frost (left) and first fall frost (right). Cooler colors indicate an earlier day of the year. CREDIT Courtesy of Court Strong/University of Utah.

Such timing is in flux, however. The frost-free season in North America is approximately 10 days longer now than it was a century ago. In a new study…

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