Articles | Volume 13, issue 10
Clim. Past, 13, 1323–1338, 2017
https://doi.org/10.5194/cp-13-1323-2017
Clim. Past, 13, 1323–1338, 2017
https://doi.org/10.5194/cp-13-1323-2017

Research article 11 Oct 2017

Research article | 11 Oct 2017

Does δ18O of O2 record meridional shifts in tropical rainfall?

Alan M. Seltzer et al.

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Latest update: 07 Dec 2021
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Short summary
To explore whether the oxygen-18 to oxygen-16 ratio of atmospheric O2 is sensitive to the position of the tropical rain belts, we (1) present a record of ice core bubble oxygen isotope measurements from two Antarctic ice cores, and (2) examine the sensitivity of oxygen isotopes in precipitation, weighted by photosynthesis, to the location of oxygen production over the modern-day seasonal cycle. We find a strong modern relationship and discuss implications for past shifts in tropical rainfall.