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Researchers Describe Oxygen’s Different Shapes

Oxygen-16, one of the key elements of life on earth, is produced by a series of reactions inside of red giant stars. Now a team of physicists, including one from North Carolina State University, has revealed how the element’s nuclear shape changes depending on its state, even though other attributes such as spin and parity don’t appear to differ. Their findings may shed light on how oxygen is produced.

Carbon and oxygen are formed when helium burns inside of red giant stars. Carbon-12 forms when three helium-4 nuclei combine in a very specific way (called the triple alpha process), and oxygen-16 is the combination of a carbon-12 and another helium-4 nucleus. (more…)

Recent Antarctic climate, glacier changes at the ‘upper bound’ of normal

By Guest PostMay 15, 2013Environmentantarctic glaciers, antarctic peninsula, antarctic warming, Antarctica, climate change, dark layer, eric steig, glaciers, global warming, human caused warming, ice core, ice sheet divide, icy continent, isotope oxygen 18, oxygen 16, qinghua ding, rapid ice loss, sea-level rise, south america, temperature, tropical pacific ocean, university of washington, upper bound, volcanic ash, west antarctic

In the last few decades, glaciers at the edge of the icy continent of Antarctica have been thinning, and research has shown the rate of thinning has accelerated and contributed significantly to sea level rise.

New ice core research suggests that, while the changes are dramatic, they cannot be attributed with confidence to human-caused global warming, said Eric Steig, a University of Washington professor of Earth and space sciences. (more…)

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Researchers Describe Oxygen’s Different Shapes

Recent Antarctic climate, glacier changes at the ‘upper bound’ of normal