NPR News5/13/2026Environment1 min readUnited States
In Fairbanks, Alaska, spring happens overnight
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Fairbanks, Alaska experiences a rapid 'greenup' with birch and aspen trees leafing out in 24-48 hours, marking an abrupt spring onset.
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In Fairbanks, Alaska, spring happens overnight. In many places, spring happens gradually. But in far-north Fairbanks, Alaska, birch and aspen trees often put their leaves out over a span of just 24-48 hours, a dramatic event known as "greenup."
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This article was originally published by NPR News.
