Tuesday, August 27, 2013

Sequoias are used to this

Fire scars (arrows)  in a sequoia cross-section show 
that this tree survived repeated wildfires over
 its 500 year lifespan.
National Geographic has a nice write-up of how sequoias handle wildfires like the current Rim Fire near Yosemite valley. As the cross-section shows, these giants have seen it all, from droughts to wildfires.  During the Medieval Warm period, a prior very warm and dry period in the Sierras, a given sequoia would experience wildfires at intervals of 10 to 15 years.

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