Mayotte coral reveals hydrological changes in the western Indian Ocean between 1881 and 1994
| Autor: | Jens Zinke, Wolf-Christian Dullo, Miriam Pfeiffer, Oliver Elison Timm, Dick Kroon, B. A. Thomassin |
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| Rok vydání: | 2008 |
| Předmět: |
010504 meteorology & atmospheric sciences
biology δ18O Coral Porites Earth and Planetary Sciences(all) 010502 geochemistry & geophysics biology.organism_classification 01 natural sciences Pacific ocean Indian ocean Geophysics Oceanography Hydrological balance 13. Climate action Climatology Spatial ecology Extratropical cyclone General Earth and Planetary Sciences 14. Life underwater Geology 0105 earth and related environmental sciences |
| Zdroj: | Zinke, J, Pfeiffer, M, Timm, O, Dullo, W C, Kroon, D & Thomassin, B A 2008, ' Mayotte coral reveals hydrological changes in the western Indian Ocean between 1881 and 1994 ', Geophysical Research Letters, vol. 35, no. 23 . https://doi.org/10.1029/2008GL035634 |
| ISSN: | 0094-8276 |
| DOI: | 10.1029/2008gl035634 |
| Popis: | 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 Nino-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. |
| Databáze: | OpenAIRE |
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