Past summer upwelling events in the Gulf of Oman derived from a coral geochemical record.

ABSTRACT: We used a high-resolution oxygen isotope (δ¹⁸O_coral), carbon isotope (δ¹³C_coral) and Sr/Ca ratios measured in the skeleton of a reef-building coral, Porites sp., to reveal seasonal-scale upwelling events and their interannual variability in the Gulf of Oman. Our δ¹³C_coral record shows sharp negative excursions in the summer, which correlate with known upwelling events. Using δ¹³C_coral anomalies as a proxy for upwelling, we found 17 summer upwelling events occurred in the last 26 years. These anomalous negative excursions of δ¹³C_coral result from upwelled water depleted in ¹³C (dissolved inorganic carbon) and decreased water-column transparency. We reconstructed biweekly

SUBMITTER: Watanabe TK 

PROVIDER: S-EPMC5496871 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature