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Latest Laboratory of Tree-Ring Research Stories

Image 1 - Evidence Of Previously Unknown 2nd Century Drought Discovered
2011-11-05 04:48:17

Researchers with the University of Arizona (UA's) have discovered evidence of a formerly unknown, decades-long drought that occurred in the southwestern United States in the second century, the school announced in a November 3 press release. The study, which was the work of geoscientists Cody Routson, Connie Woodhouse and Jonathan Overpeck of the university's Laboratory of Tree-Ring Research, involved a study of the southern San Juan Mountains in Colorado. The region is said to be a...

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2010-05-26 09:42:42

Droughts in the late 20th century rival some of North Africa's major droughts of centuries past, reveals new research that peers back in time to the year 1179. The first multi-century drought reconstruction that includes Morocco, Algeria and Tunisia shows frequent and severe droughts during the 13th and 16th centuries and the latter part of the 20th century. An international research team figured out northwest Africa's climate history by using the information recorded in tree rings. The...

2007-05-17 18:08:05

An epic drought during the mid-1100s dwarfs any drought previously documented for a region that includes areas of Arizona, Colorado, New Mexico, Utah and Wyoming. The six-decade-long drought was remarkable for the absence of very wet years.  At the core of the drought was a period of 25 years in which Colorado River flow averaged 15 percent below normal. The new tree-ring-based reconstruction documents the year-by-year natural variability of streamflows in the upper Colorado River basin...

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2006-07-06 11:10:00

WASHINGTON -- The increase in the number of large western wildfires in recent years may be a result of global warming, researchers say. An analysis of data going back to 1970 indicates the fires increased "suddenly and dramatically" in the 1980s and the wildfire season grew longer, according to scientists in Arizona and California. "The increase in large wildfires appears to be another part of a chain of reactions to climate warming," said Dan Cayan, a co-author of the paper and director of...


Word of the Day
jument
  • A beast of burden; also, a beast in general.
'Jument' ultimately comes from the Latin 'jugum,' yoke.
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