Articles | Volume 13, issue 10
https://doi.org/10.5194/cp-13-1323-2017
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, Christo Buizert, Daniel Baggenstos, Edward J. Brook, Jinho Ahn, Ji-Woong Yang, and Jeffrey P. Severinghaus

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ED: Publish subject to minor revisions (review by Editor) (30 Aug 2017) by Amaelle Landais
AR by Alan Seltzer on behalf of the Authors (07 Sep 2017)  Author's response   Manuscript 
ED: Publish as is (11 Sep 2017) by Amaelle Landais
AR by Alan Seltzer on behalf of the Authors (11 Sep 2017)
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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.