Pan-Pacific Megadroughts


Using ‘drought atlases’ -- gridded spatial and temporal
reconstructions of past moisture conditions from
networks of tree ring chronologies developed by the
Lamont Doherty Earth Observatory Tree Ring Laboratory
under the direction of Edward Cook -- we can look for
the ‘fingerprint’ of severe episodic drought spanning the
Pacific Ocean in North America and Asia over the last
1000 years. Two patterns emerge, the first where one
region is dry while the other wet. The other, rare but
more worrying, with both regions in long severe drought.

Ongoing work by Kevin Anchukaitis, Brendan Buckley, and colleagues
 at the LDEO TRL. Presented at the AGU Chapman Conference on
 Climate, Past Landscapes, and Civilization, Santa Fe NM March 2011