Study: 'Megadroughts' may be recurring in region

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ALBUQUERQUE, N.M. (AP) -- New research by a University of Arizona team suggests that "megadroughts" may be a recurring feature of the region's climate.

The Albuquerque Journal reports ( ) that the study provides the most detailed record of climate in the San Juan and Rio Grande basins - the river basins that provide much of New Mexico's water supply - over the last 2,000 years.

The study, being published in the journal Geophysical Research Letters, comes from a grove of bristlecone pine found in the mountains near Summitville, Colo.

The study also found that tree rings from the headwaters of the Rio Grande show a 50-year drought from 122 to 172 AD.

Scientists have long known about similar drought a thousand years later but it was never clear whether that drought was unique.


Information from: Albuquerque Journal,

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