Hydroclimate records and radiocarbon dating of sediment cores SO189/2 _39KL, SO189/2 _119KL, and SO189/2 _144KL from the eastern tropical Indian Ocean ...

• Main Authors: Mohtadi, Mahyar, Prange, Matthias, Oppo, Delia W, De Pol-Holz, Ricardo, Merkel, Ute, Zhang, Xiao, Steinke, Stephan, Lückge, Andreas
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2014
• Subjects: Center for Marine Environmental Sciences MARUM; Indian; Andreas; Ricardo; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.833329; https://doi.pangaea.de/10.1594/PANGAEA.833329

The response of the tropical climate in the Indian Ocean realm to abrupt climate change events in the North Atlantic Ocean is contentious. Repositioning of the intertropical convergence zone is thought to have been responsible for changes in tropical hydroclimate during North Atlantic cold spells1, 2, 3, 4, 5, but the dearth of high-resolution records outside the monsoon realm in the Indian Ocean precludes a full understanding of this remote relationship and its underlying mechanisms. Here we show that slowdowns of the Atlantic meridional overturning circulation during Heinrich stadials and the Younger Dryas stadial affected the tropical Indian Ocean hydroclimate through changes to the Hadley circulation including a southward shift in the rising branch (the intertropical convergence zone) and an overall weakening over the southern Indian Ocean. Our results are based on new, high-resolution sea surface temperature and seawater oxygen isotope records of well-dated sedimentary archives from the tropical eastern ... : Supplement to: Mohtadi, Mahyar; Prange, Matthias; Oppo, Delia W; De Pol-Holz, Ricardo; Merkel, Ute; Zhang, Xiao; Steinke, Stephan; Lückge, Andreas (2014): North Atlantic forcing of tropical Indian Ocean climate. Nature, 509(7498), 76-80 ...