Journal article
Rapid interhemispheric climate links via the Australasian monsoon during the last deglaciation
LK Ayliffe, MK Gagan, JX Zhao, RN Drysdale, JC Hellstrom, WS Hantoro, ML Griffiths, H Scott-Gagan, ES Pierre, JA Cowley, BW Suwargadi
Nature Communications | Published : 2013
DOI: 10.1038/ncomms3908
Abstract
Recent studies have proposed that millennial-scale reorganization of the ocean-atmosphere circulation drives increased upwelling in the Southern Ocean, leading to rising atmospheric carbon dioxide levels and ice age terminations. Southward migration of the global monsoon is thought to link the hemispheres during deglaciation, but vital evidence from the southern sector of the vast Australasian monsoon system is yet to emerge. Here we present a 230 thorium-dated stalagmite oxygen isotope record of millennial-scale changes in Australian-Indonesian monsoon rainfall over the last 31,000 years. The record shows that abrupt southward shifts of the Australian-Indonesian monsoon were synchronous wit..
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Awarded by Australian Research Council
Funding Acknowledgements
We thank the Indonesian Institute of Sciences (LIPI) for logistical and technical support in the field; J. Cali for stable isotope laboratory support; D. Qu, Y. Feng, G. Mortimer and M. McCulloch for U-series laboratory support; U. Troitzch for XRD analyses; J. Cali and B. Ferguson for specimen photography; G. Smith for providing the thumbnail photograph; the staff of K&D Stonemasons for help with stalagmite sectioning; N. Anderson and G. Smith for expert caving support and the people of Rampasasa village, Flores for assistance in the field. The work was carried out under LIPI Research Permit number 04057/SU/KS/2006 and funded by Australian Research Council Discovery grants DP0663274 and DP1095673 to M. K. G., R. N. D., J.-x.Z., J. C. H. and W.S.H.