Natural gamma ray downhole logging-based elemental data IODP Sites U1459 and U1464, W-Australia, Miocene ...

• Main Authors: Groeneveld, Jeroen, Henderiks, Jorijntje, Renema, Willem, McHugh, Cecilia M G, De Vleeschouwer, David, Christensen, Beth A, Fulthorpe, Craig S, Reuning, Lars, Gallagher, Stephen John, Bogus, Kara A, Auer, Gerald, Ishiwa, Takeshige, Expedition 356 Scientists
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2018
• Subjects: Integrated Ocean Drilling Program / International Ocean Discovery Program IODP; Antarctic; Christensen; The Antarctic; Antarc*; Antarctica; Ice Sheet
• Online Access: https://dx.doi.org/10.1594/pangaea.893169; https://doi.pangaea.de/10.1594/PANGAEA.893169

Global climate underwent a major reorganization when the Antarctic ice sheet expanded ~14 million years ago (Ma) (1). This event affected global atmospheric circulation, including the strength and position of the westerlies and the Intertropical Convergence Zone (ITCZ), and, therefore, precipitation patterns (2-5). We present new shallow-marine sediment records from the continental shelf of Australia (International Ocean Discovery Program Sites U1459 and U1464) providing the first empirical evidence linking high-latitude cooling around Antarctica to climate change in the (sub)tropics during the Miocene. We show that Western Australia was arid during most of the Middle Miocene. Southwest Australia became wetter during the Late Miocene, creating a climate gradient with the arid interior, whereas northwest Australia remained arid throughout. Precipitation and river runoff in southwest Australia gradually increased from 12 to 8 Ma, which we relate to a northward migration or intensification of the westerlies ... : Supplement to: Groeneveld, Jeroen; Henderiks, Jorijntje; Renema, Willem; McHugh, Cecilia M G; De Vleeschouwer, David; Christensen, Beth A; Fulthorpe, Craig S; Reuning, Lars; Gallagher, Stephen John; Bogus, Kara A; Auer, Gerald; Ishiwa, Takeshige; Expedition 356 Scientists (2017): Australian shelf sediments reveal shifts in Miocene Southern Hemisphere westerlies. Science Advances, 3(5), e1602567 ...