Southern Hemisphere control on Australian monsoon variability during the late deglaciation and Holocene
| Type | Article | ||||||||||||
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| Date | 2015-01 | ||||||||||||
| Language | English | ||||||||||||
| Author(s) | Kuhnt Wolfgang1, Holbourn Ann1, Xu Jian2, 3, Opdyke Bradley4, de Deckker Patrick4, Roehl Ursula5, Mudelsee Manfred6 | ||||||||||||
| Affiliation(s) | 1 : Univ Kiel, Inst Geosci, D-24118 Kiel, Germany. 2 : Northwest Univ, State Key Lab Continental Dynam, Xian 710069, Peoples R China. 3 : Northwest Univ, Dept Geol, Xian 710069, Peoples R China. 4 : Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT 2601, Australia. 5 : Univ Bremen, MARUM Zentrum Marine Umweltwissensch, D-28359 Bremen, Germany. 6 : Climate Risk Anal, D-37581 Bad Gandersheim, Germany. |
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| Source | Nature Communications (2041-1723) (Nature Publishing Group), 2015-01 , Vol. 6 , N. 5916 , P. 1-7 | ||||||||||||
| DOI | 10.1038/ncomms6916 | ||||||||||||
| WOS© Times Cited | 78 | ||||||||||||
| 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. | ||||||||||||
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