Articles | Volume 13, issue 10
Clim. Past, 13, 1323–1338, 2017
Clim. Past, 13, 1323–1338, 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.


Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
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
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.