News tagged with oxygen isotopes

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Ancient Earth crust stored in deep mantle

Scientists have long believed that lava erupted from certain oceanic volcanoes contains materials from the early Earth's crust. But decisive evidence for this phenomenon has proven elusive. New research from ...

Apr 24, 2013 4.7 / 5 (3) 0 | with audio podcast

Greenhouse gases from farmland underestimated

(Phys.org)—Changes in agricultural practices could reduce soil emissions of the greenhouse gas nitrous oxide and the atmospheric pollutant nitric oxide, according to a new study by scientists at the University of California, ...

Apr 02, 2013 5 / 5 (3) 0

Tree die-off triggered by hotter temperatures

A team of scientists, led by researchers at Carnegie's Department of Global Ecology, has determined that the recent widespread die-off of Colorado trembling aspen trees is a direct result of decreased precipitation exacerbated ...

Feb 11, 2013 5 / 5 (5) 8 | with audio podcast