title: Southern Hemisphere control on Australian monsoon variability during the late deglaciation and Holocene.
abstract: The evolution of the Australian monsoon in relation to high-latitude temperature fluctuations over the last termination remains highly enigmatic. Here we integrate high-resolution riverine runoff and dust proxy data from X-ray fluorescence scanner measurements in four well-dated sediment cores, forming a NE-SW transect across the Timor Sea. Our records reveal that the development of the Australian monsoon closely followed the deglacial warming history of Antarctica. A minimum in riverine runoff documents dry conditions throughout the region during the Antarctic Cold Reversal (15-12.9 ka). Massive intensification of the monsoon coincided with Southern Hemisphere warming and intensified greenhouse forcing over Australia during the atmospheric CO2 rise at 12.9-10 ka. We relate the earlier onset of the monsoon in the Timor Strait (13.4 ka) to regional changes in landmass exposure during deglacial sea-level rise. A return to dryer conditions occurred between 8.1 and 7.3 ka following the early Holocene runoff maximum.
authors.affiliation: Institute of Geosciences, Christian-Albrechts-University, Ludewig-Meynstrasse 10-14, D-24118 Kiel, Germany.
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Kuhnt
authors.affiliation: Institute of Geosciences, Christian-Albrechts-University, Ludewig-Meynstrasse 10-14, D-24118 Kiel, Germany.
authors.forename: Ann
authors.initials: A
authors.lastname: Holbourn
authors.affiliation: State Key Laboratory of Continental Dynamics and Department of Geology, Northwest University, 229 North Taibai Road, Xi'an 710069, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Xu
authors.affiliation: Research School of Earth Sciences, The Australian National University, Canberra, Australian Capital Territory 2601, Australia.
authors.forename: Bradley
authors.initials: B
authors.lastname: Opdyke
authors.affiliation: Research School of Earth Sciences, The Australian National University, Canberra, Australian Capital Territory 2601, Australia.
authors.forename: Patrick
authors.initials: P
authors.lastname: De Deckker
authors.affiliation: MARUM-Zentrum für Marine Umweltwissenschaften, Universität Bremen, Leobener Strasse, D-28359 Bremen, Germany.
authors.forename: Ursula
authors.initials: U
authors.lastname: Röhl
authors.affiliation: Climate Risk Analysis, Kreuzstrasse 27, D-37581 Bad Gandersheim, Germany.
authors.forename: Manfred
authors.initials: M
authors.lastname: Mudelsee