High on mountains across Alaska, Canada, Europe and Russia near the upper tree line, even the hardiest of conifers are at the edge of survival. Their annual rings tell a story of extreme cold that limited their growth and ...
Earth Sciences
Jan 29, 2016
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Trees can record centuries of history in their rings – changes in rainfall and temperatures, even evidence of fires sweeping through a region or the climatic impacts of volcanic eruptions. Annual rings are common in trees ...
Earth Sciences
Aug 24, 2015
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A new study of tree rings from Mongolia dating back more than 1,000 years confirms that recent warming in central Asia has no parallel in any known record. In recent decades, temperatures have been ascending more rapidly ...
Earth Sciences
Jun 11, 2015
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When you're building a massive telescope designed to detect subtle shapes in the light emitted by distant galaxies, you'd like to know that the shapes you are seeing are accurate and not the result of defects in your telescope's ...
Astronomy
Apr 28, 2015
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(Phys.org)—A team of researchers with members from institutions in the Netherlands, Bolivia and the U.K. has found that tree ring samples taken from tropical forests show no evidence of faster growth over the past 150 years—a ...
Since the start of the industrial revolution in 1850, atmospheric CO2 levels have increased by about 40%. However, contrary to expectations, the growth of tropical trees has not increased as a result. The prediction that ...
Environment
Dec 16, 2014
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A new GSA Bulletin study uses tree rings to document arroyo evolution along the lower Rio Puerco and Chaco Wash in northern New Mexico, USA. By determining burial dates in tree rings from salt cedar and willow, investigators ...
Earth Sciences
Sep 18, 2014
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A local water expert says more work needs to be done to understand the state's past atmospheric conditions to determine how climate change will affect water resources.
Earth Sciences
Aug 1, 2014
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On a quest to learn more about fires in the Northern Rockies, Montana State University, Salish Kootenai College and federal researchers are looking to the trees, lakes and oral tradition for insights they can share with land ...
Environment
Jun 17, 2014
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(Phys.org) —A handful of tree ring samples stored in an old cigar box have shed unexpected light on the ancient world, thanks to research by archaeologist Sturt Manning and collaborators at Cornell, Arizona, Chicago, Oxford ...
Archaeology
May 15, 2014
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