Sunday, February 23, 2014

Why You Shouldn’t Hope for an Early Spring

Unusually early warming, known as “false spring,” is becoming increasingly common as climate changes. (Credit: Brenda Anderson/flickr) Click to enlarge.
Unusually early warming, known as “false spring,” is becoming increasingly common as climate changes. Its effects are also prompting increasing concern. For when warm temperatures awaken dormant plants and animals prematurely, they can throw the timing of seasonal events crucial to an entire ecological food web off kilter.  The results can cause devastating harm to both wild and cultivated species.  False spring events have caused enormous losses in U.S. fruit crops, damaged large swaths of forest and decimated sensitive California butterfly populations.

While occasional false springs are not new, what is new in recent years is the combination of increasingly warmer springs and extreme temperature swings, overall shorter times throughout fall and winter of below-freezing temperatures, and the altered precipitation patterns associated with global climate change.

Why You Shouldn’t Hope for an Early Spring

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