Oxygen-18 of O2 records the impact of abrupt climate change on the terrestrial biosphere.

@article{Severinghaus2009Oxygen18OO,
  title={Oxygen-18 of O2 records the impact of abrupt climate change on the terrestrial biosphere.},
  author={Jeffrey P Severinghaus and Ross Beaudette and Melissa A. Headly and Kendrick C. Taylor and Edward J. Brook},
  journal={Science},
  year={2009},
  volume={324 5933},
  pages={1431-4}
}
Photosynthesis and respiration occur widely on Earth's surface, and the 18O/16O ratio of the oxygen produced and consumed varies with climatic conditions. As a consequence, the history of climate is reflected in the deviation of the 18O/16O of air (delta18Oatm) from seawater delta18O (known as the Dole effect). We report variations in delta18Oatm over the past 60,000 years related to Heinrich and Dansgaard-Oeschger events, two modes of abrupt climate change observed during the last ice age… CONTINUE READING

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