Guest essay by Richard Taylor
Introduction
Our current understanding climate was influenced profoundly by the publication (J.R. Petit, et al., 1999) of deuterium (2H) measurements from metre 8 to metre 3310 of the Vostok ice-core, indicating the temperature of the nearby atmosphere from 1800 to 421000 BC. Some authorities claim, and many believe, that unprecedented climate-change has begun in recent years which threatens the very existence of human-kind. The uppermost 7 m of the Vostok core might have provided a unique perspective on this frightening claim, but the available data (https://www.ncdc.noaa.gov/paleo/study/2453) have only a mean deuterium value of -438 ‰ for this recent portion, well below the highest value in the core of -414.8 ‰.
A Russian team, however, has been active establishing a chronology of deuterium from snow-cores and -pits near the Vostok station (A.A. Ekaykin, et al., 2014). A summary (www.ncdc.noaa.gov/paleo/study/22532
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