Journal article

Plio‐Pleistocene Indonesian Throughflow Variability Drove Eastern Indian Ocean Sea Surface Temperatures

Rebecca A Smith, Isla S Castañeda, Jeroen Groeneveld, David De Vleeschouwer, Jorijntje Henderiks, Beth A Christensen, Willem Renema, Gerald Auer, Kara Bogus, Stephen J Gallagher, Craig S Fulthorpe

Paleoceanography and Paleoclimatology | American Geophysical Union (AGU) | Published : 2020


Ocean gateways facilitate circulation between ocean basins, thereby impacting global climate. The Indonesian Gateway transports water from the Pacific to the Indian Ocean via the Indonesian Throughflow (ITF) and drives the strength and intensity of the modern Leeuwin Current, which carries warm equatorial waters along the western coast of Australia to higher latitudes. Therefore, ITF dynamics are a vital component of global thermohaline circulation. Plio‐Pleistocene changes in ITF behavior and Leeuwin Current intensity remain poorly constrained due to a lack of sedimentary records from regions under its influence. Here, organic geochemical proxies are used to reconstruct sea surface temperat..

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Awarded by ARC Basins Genesis Hub

Awarded by German Research Foundation (Deutsche Forschungsgemeinschaft [DFG])

Funding Acknowledgements

We would like to thank the Editor, the Associate Editor, and three anonymous reviewers for useful feedback, which has significantly strengthened this manuscript. We would like to acknowledge Dr. Jeffrey Salacup, Kathryn Turner, Dr. Sivajini Gilchrist, and Dr. Benjamin Keisling for their help with lab work and sample analyses. This research used samples and data provided by the International Ocean Discovery Program. Funding for organic geochemical analyses was provided by a U.S. Science Support Program (USSSP) Post-Expedition Award to I. S. C. Additional funding was raised through the analysis of external samples at the UMass Amherst Biogeochemistry Laboratory. Funding to S. J. G. was provided by Australian IODP Office and the ARC Basins Genesis Hub (IH130200012). J. G. thanks the German Research Foundation (Deutsche Forschungsgemeinschaft [DFG] Project "IDEAL" GR 3528/5-1). We thank the USIO staff and the SIEM Offshore crew for their invaluable assistance and skill during the expedition.