Sierra Nevada 200-year megadroughts confirmed
Friday, June 1, 2012 - 13:30
in Earth & Climate
The culmination of a comprehensive high-tech assessment of Fallen Leaf Lake -- a small moraine-bound lake at the south end of the Lake Tahoe Basin -- shows that stands of pre-Medieval trees in the lake suggest the region experienced severe drought at least every 650 to 1,150 years during the mid- and late-Holocene period.