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In our core top samples, a steep increase in planktic \u03b4<jats:sup>18<\/jats:sup>O, associated with a decrease in sea surface temperature (SST), indicates that the southwestern front of the IPWP is located between 23\u00b0 and 24\u00b0S during austral fall. We additionally reconstructed SST, sea surface salinity ,and \u03b4<jats:sup>18<\/jats:sup>O seawater (\u03b4<jats:sup>18<\/jats:sup>O<jats:sub>sw<\/jats:sub>) over the last 450 kyr in two sediment successions located within and beyond the monsoonal rain belt. Our records show that SST was highly coherent and phase\u2010locked with atmospheric <jats:italic>p<\/jats:italic>CO<jats:sub>2<\/jats:sub> during the last 450 kyr. The regional differences in the \u03b4<jats:sup>18<\/jats:sup>O<jats:sub>sw<\/jats:sub> records reveal that the Western Australian Margin north of 15\u00b0S remained seasonally under the influence of IPWP water masses, even during glacials. The temporal variability in upper ocean hydrology along the Western Australian Margin is not directly coupled to local monsoonal precipitation, but is strongly affected by advective mixing of Indonesian Throughflow derived water masses.<\/jats:p>","DOI":"10.1029\/2021pa004222","type":"journal-article","created":{"date-parts":[[2021,10,28]],"date-time":"2021-10-28T09:39:06Z","timestamp":1635413946000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Evolution of Sea Surface Hydrology Along the Western Australian Margin Over the Past 450 kyr"],"prefix":"10.1029","volume":"36","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5578-3653","authenticated-orcid":false,"given":"Renjie","family":"Pei","sequence":"first","affiliation":[{"name":"Institute of Geosciences Christian\u2010Albrechts\u2010University  Kiel 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