Journal article

Coupling of the Intertropical Convergence Zone and Southern Hemisphere mid-latitude climate during the early to mid-Holocene

Michela Mariani, Michael-Shawn Fletcher, Russell N Drysdale, Krystyna M Saunders, Henk Heijnis, Geraldine Jacobsen, Atun Zawadzki

Geology | Geological Society of America | Published : 2017

Abstract

Conceptual models predict a tight coupling between the Intertropical Convergence Zone (ITCZ) and the Southern Westerly Winds (SWW) in response to glacial-interglacial transitions, yet little is known about this relationship under Holocene boundary conditions. Here we present a synthesis of Holocene pollen data from the southwest Pacific mid-latitudes that tracks changes in the SWW. Comparison of our SWW paleoclimate records with data tracking the ITCZ, oceanic circulation, and insolation reveals clearly synchronous and in-phase ITCZ-SWW dynamics between 12 and 5 ka, indicating a tight coupling between the tropics and southern mid-latitudes in response to ocean circulation and insolation. An ..

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Grants

Awarded by Australian Research Council


Awarded by Australian Institute for Nuclear Science and Engineer (AINSE)


Awarded by AINSE Postgraduate Research Award


Funding Acknowledgements

Research was supported by Australian Research Council grants (DI110100019, IN140100050, and IN170100062) and two Australian Institute for Nuclear Science and Engineer (AINSE) awards (ANALGRA15029 and ALNGRA16024). MM was also supported by an AINSE Postgraduate Research Award (12039). We thank two anonymous reviewers for comments on an earlier draft of this manuscript.