Eight glacial cycles from an Antarctic ice core
By L. Augustin, C. Barbante, P. Barnes, J. Barnola, M. Bigler, E. Castellano, O. Cattani, J. Chappellaz, D. Dahl-Jensen, B. Delmonte and 46 more. Nature, 2004
2,028 citations recorded by the source corpus.
The Antarctic Vostok ice core provided compelling evidence of the nature of climate, and of climate feedbacks, over the past 420,000 years. Marine records suggest that the amplitude of climate variability was smaller before that time, but such records are often poorly resolved. Moreover, it is not possible to infer the abundance of greenhouse gases in the atmosphere from marine records. Here we report the recovery of a deep ice core from Dome C, Antarctica, that provides a climate record for the past 740,000 years. For the four most recent glacial cycles, the data agree well with the record from Vostok. The earlier period, between 740,000 and 430,000 years ago, was characterized by less pronounced warmth in interglacial periods in Antarctica, but a higher proportion of each cycle was spent in the warm mode. The transition from glacial to interglacial conditions about 430,000 years ago (Termination V) resembles the transition into the present interglacial period in terms of the magnitude of change in temperatures and greenhouse gases, but there are significant differences in the patterns of change. The interglacial stage following Termination V was exceptionally long—28,000 years compared to, for example, the 12,000 years recorded so far in the present interglacial period. Given the similarities between this earlier warm period and today, our results may imply that without human intervention, a climate similar to the present one would extend well into the future.
Subfields: Atmospheric Science, Management, Monitoring, Policy and Law
View Paper: https://www.semanticscholar.org/paper/0f7f3fb6948b0ecda724121e46561cbe287e0b02
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- EFFECTS OF CLIMATE CHANGE ON GLOBAL SEAWEED COMMUNITIES (2012, background): “We have already exceeded the maximum CO2 concentration experienced in the last 740,000 years (Augustin et al. 2004), and will soon exceed the range of CO2 concentrations experienced in tens of millions of years (Pearson and Palmer 2000, IPCC 2007).”