Ice cores reveal slow decline in oxygen over past 800K years

Ice cores reveal slow decline in oxygen over past 800K years Princeton NJ (SPX) Oct 07, 2016 - Princeton University researchers have compiled 30 years of data to construct the first ice core-based record of atmospheric oxygen concentrations spanning the past 800,000 years, according to a paper in the journal Science. The record shows that atmospheric oxygen has declined 0.7 percent relative to current atmospheric-oxygen concentrations, a reasonable pace by geological standards, the ... more

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