Christensen B.ADe Vleeschouwer DHenderiks JJEROEN GROENEVELDAuer GDrury A.JKaratsolis B.TLyu JBetzler CEberli G.PKroon D.2022-11-112022-11-11202100948276https://www.scopus.com/inward/record.uri?eid=2-s2.0-85115784531&doi=10.1029%2f2021GL095036&partnerID=40&md5=a4d4e6ec37137ec687e5204ad0bb9443https://scholars.lib.ntu.edu.tw/handle/123456789/624732This study provides a Miocene-to-recent history of Tasman Leakage (TL), driving surface-to-intermediate waters from the Pacific into the Indian Ocean. TL, in addition to Indonesian ThroughFlow (ITF), constitutes an important part of the Southern Hemisphere Supergyre. Here, we employ deep-sea benthic δ13C timeseries from the southwestern Pacific and eastern Indian Oceans to identify the history of Tasman Leakage. The δ13C results combined with sedimentary evidence show that an inter-ocean connection south of Australia existed from 7 Ma onward. A southward shift in Westerlies combined with a northward movement of Australia created the oceanic corridor necessary for Tasman Leakage (between Australia and the sub-Antarctic Front) at this time. Furthermore, changes in the northern limb of the Supergyre (ITF) are evident in the sedimentary record on Broken Ridge from ∼3 to 2 Ma when Banda Sea intermediate waters started originating from the North Pacific. © 2021. The Authors.Australia; intermediate water; ITF; late Miocene; Southern Hemisphere Supergyre; Tasman LeakageOceanography; Australia; Deep sea; Indian ocean; Indonesian throughflow; Intermediate waters; Late Miocene; Miocene; Southern Hemisphere; Southern hemisphere supergyre; Tasman leakage; Sedimentology; carbon isotope; deep-sea benthos; intermediate water; leakage; Miocene; oceanic front; Southern Hemisphere; surface water; throughflow; westerly; Australia; Banda Sea; Indian Ocean; Indonesian seas; Pacific Ocean; Pacific Ocean (North)journal article10.1029/2021GL0950362-s2.0-85115784531