Mayotte coral reveals hydrological changes in the western Indian Ocean between 1881 and 1994
Article first published online: 10 DEC 2008
Copyright 2008 by the American Geophysical Union.
Geophysical Research Letters
Volume 35, Issue 23, December 2008
How to Cite
2008), Mayotte coral reveals hydrological changes in the western Indian Ocean between 1881 and 1994, Geophys. Res. Lett., 35, L23707, doi:10.1029/2008GL035634., , , , , and (
- Issue published online: 10 DEC 2008
- Article first published online: 10 DEC 2008
- Manuscript Accepted: 5 NOV 2008
- Manuscript Revised: 22 SEP 2008
- Manuscript Received: 8 AUG 2008
- coral geochemistry;
- hydrological balance;
- Indian Ocean
 We reconstruct the hydrologic history of the tropical western Indian Ocean by calculating the δ18Oseawater from coupled coral Sr/Ca and δ18O measurements in a massive Porites coral from Mayotte (Comoros) between 1881 and 1994. We found that the precipitation-evaporation balance varies naturally on time scales of 5–6 years and 18–25 years. High (low) SSTs are associated with positive (negative) δ18Oseawater implying that atmospheric variability is linked with remote climate modes in the Indian Ocean and the tropical/extratropical Pacific Ocean. Warm El Niño-Southern Oscillation events are associated with a negative freshwater balance at Mayotte. This case study demonstrates that a much denser network of δ18Oseawater reconstructions is crucial for understanding the spatial patterns of hydrological conditions.