Journal article

Changes in biomass burning mark the onset of an ENSO-influenced climate regime at 42 degrees S in southwest Tasmania, Australia

Michael-Shawn Fletcher, Alexa Benson, Hendrik Heijnis, Patricia S Gadd, Les C Cwynar, Andrew BH Rees

Quaternary Science Reviews | PERGAMON-ELSEVIER SCIENCE LTD | Published : 2015

Abstract

We use macroscopic charcoal and sediment geochemistry analysis of two proximal upper montane lakes located at 42°S in southwest Tasmania, Australia, to test the role of the southern hemisphere westerly winds (SWW) and the El Niño-Southern Oscillation (ENSO) in governing the climate of this sector of the southern mid-to high-latitudes. Inter-annual climate anomalies in the study area are driven by changes in both ENSO and the Southern Annular Mode (SAM - an index that describes seasonal to decadal shifts in the SWW), making it an ideal location to test assumptions about the varying influence of the SWW and ENSO, two important components of the global climate system, through time. We find mult..

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University of Melbourne Researchers

Grants

Awarded by ARC projects


Awarded by CONICYT project


Awarded by AINSE Award


Funding Acknowledgements

M.-S.F. acknowledges financial support from ARC projects DI110100019 and IN140100050, CONICYT project 3110180 and AINSE Award ALNGRA12003. Thanks for Rachael-Ann Fletcher for analysing macroscopic charcoal from TAS1106. Thanks to Scott Nichols, Jared Pedro, Lucy Gayler and Peter Shimeld for assistance in the field. We thank Agathe Lise-Pronovost for providing the Laguna Potrok Aike magnetic data. We also thank Patricio I Moreno for valuable comments on an earlier draft of this manuscript.