Giant sequoias hold clues to centuries-long Sierra Nevada dry spell

By Mark Grossi / The Bulletin
March 31, 2010

FRESNO, Calif. — Scientists have found evidence in Sequoia National Park of a centuries-long dry spell — and clues about how the Sierra Nevada could be changing.

The researchers studied tree rings on dead giant sequoias, the largest trees on Earth. They found that during a warm, dry period....

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