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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Cited articles

Ahn, J. and Brook, E. J.: Siple Dome ice reveals two modes of millennial CO2 change during the last ice age, Nat. Commun., 5, 3723, https://doi.org/10.1038/ncomms4723, 2014.
Ahn, J., Brook, E. J., Schmittner, A., and Kreutz, K.: Abrupt change in atmospheric CO2 during the last ice age, Geophys. Res. Lett., 39, 1–5, https://doi.org/10.1029/2012GL053018, 2012.
Ahn, J., Brook, E. J., and Buizert, C.: Response of atmospheric CO2 to the abrupt cooling event 8200 years ago, Geophys. Res. Lett., 41, 604–609, https://doi.org/10.1002/2013GL058177, 2014.
Angert, A., Luz, B., and Yakir, D.: Fractionation of oxygen isotopes by respiration and diffusion in soils and its implications for the isotopic composition of atmospheric O2, Global Biogeochem. Cy., 15, 871–880, https://doi.org/10.1029/2000GB001371, 2001.
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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.