Dr Toshiyuki Fujioka
Role at ANSTO
Toshi works for "Isotopes in Climate Change and Atmospheric Systems Project" within Institute for Environmental Research. His research is focused on developing the surface exposure dating based on in situ cosmogenic isotopes (e.g., Be-10, C-14, Ne-21, Al-26, Cl-36 and Mn-53) to investigate the rate and timing of landscape changes in relation to the past climate.
His research interests include i) formation of desert landscapes, ii) timing and frequency of catastrophic floods caused by storms and cyclones in the past, and iii) changes in the manner of soil erosion, sediment production & transport in river systems.
His role at ANSTO, apart from conducting his own research, includes i) operating accelerator mass spectrometry (AMS) for routine Be-10 and Al-26 measurements for commercial, collaborative projects, ii) laboratory development to refine, optimise AMS target preparation, and iii) co-supervising visiting academics and postgraduate students for their laboratory work and AMS data analysis.
In situ cosmogenic nuclides surface exposure dating, desert geomorphology, accelerator mass spectrometry, landscape evolution, palaeoclimate, geochemistry.
*denote PhD student
• Australian deserts: past extent and its impact on evolution of desert species — investigating i) past extent of desert landforms, such as stony deserts and dunefields and ii) their interaction with surrounding river systems, to understand how desert landscapes in Australia formed and how they affected evolution of desert-adapted plant and animal species. Collaborators: Gerald Nanson, John Jansen, Tim Cohen, Sam Marx, Sarah Eccleshall*, Martin Struck* (U of Wollongong), Paul Hesse (Macquarie U), Stephen Tooth (Aberystwyth U, UK), Bob Craddock (Smithsonian Inst., US), Mitzy Pepper (ANU). Related articles: Fujioka et al. (Geology 2005, 2009), Fujioka and Chappell (GSL Special Publications 2010, Aeolian Research 2011), Jansen et al. (EPSL 2013). Previous grant: ARC Discovery 2013-2015 by Nanson "Anabranching rivers; the arteries of arid Australia".
• Extreme climate events and landscape modification in monsoonal Australia — constraining i) timing of past extreme events, such as storms and cyclones, through dating of flood deposits and ii) determining bedrock erosion and river incision rate, to understand influence of monsoon activity on landscape changes and humans in the northern Australia. Collaborators: Hendrik May, Gerald Nanson, John Jansen, Tibi Codilean, Tony Dosseto, Zach Swander* (UoW). Related articles: Fujioka et al. (Geology 2015).
• River response to past climate changes — investigateting past changes in soil erosion, sediment production and transport in Australian rivers, in particular Murray-Darling Basin, to understand timescales and extent of river system response to the past climate change. Collaborators: Tony Dosseto, Sam Marx, Tibi Codilean (UoW), Paul Hesse, Tim Ralph (Macq. U).
• Glacial lake outburst in Siberia — investigating timing of glacial lake outburst in Siberia during the last glacial period. Collaborators: John Jansen (UoW), Martin Margold (Stockholm U, Sweden).
• Coast geomorphology in southeastern Australia — investigating development of coastal rock platform in southeastern margin of Australia. Collaborators: Colin Woodroffe (UoW), David Kennedy (U of Melbourne).
• Stability of sandstone pillars in Central China — investigating erosion mechanism of sandstone pillars in China. Collaborators: Hendrik May (UoW), Huang He (China Acad. Sci., China).
• Development and application of cosmogenic Mn-53 method — developing methodology and applications for a new cosmogenic isotope, manganese-53. Collaborators: Keith Fifield, Anton Wallner, Steve Tims, Michaela Frohlich (ANU), Tibor Dunai, Bjorn Dittmann* (U of Cologne, Germany). Related article: Fujioka et al. (NIMB 2010).
- PhD in cosmogenic exposure dating and desert geomorphology, Australian National University, Canberra (2007).
- MSc in Geochemistry. Osaka University, Japan (2001).
- BSc in Physics. Osaka University, Japan (1999).
*denote student contribution
Fujioka, T., Fink, D., Nanson, G., Mifsud, C. and Wende, R. (2015) Flood flipped boulders: In-situ cosmogenic nuclide modeling of flood deposits in the monsoon tropics of Australia. Geology, 43, 43-46.
Fujioka, T., Fink, D. and Mifsud, C. (2015) Towards improvement of aluminium assay in quartz for in situ cosmogenic Al-26 analysis at ANSTO. Nuclear Instruments and Methods in Physics Research B, 361, 346-353.
Mifsud, C, Fujioka, T. and Fink, D. (2013) Extraction and purification of quartz in rock using hot-phosphoric acid for in situ cosmogenic exposure dating. Nuclear Instruments and Methods in Physics Research B, 294, 203-207.
Jansen, J., Nanson, G., Cohen, T., Fujioka, T., Fabel, D., Larsen, J., Codilean, A., Price, D., Bowman, H., May, J.-H. and Gliganic, L. (2013) Lowland river responses to intraplate tectonism and climate forcing quantified with luminescence and cosmogenic Be-10. Earth and Planetary Science Letters, 366, 49-58.
Fujioka, T. and Chappell, J. (2011) Desert landscape processes on a timescale of millions of years, probed by cosmogenic nuclides. Aeolian Research, 3, 157-164. [invited review].
*Hoo, W.T., Fifield, L.K., Tims, S.G., Fujioka, T. and Mueller, N. (2011) Using fallout plutonium as a probe for erosion assessment study. Journal of Environmental Radioactivity, 102, 937-942.
Fujioka, T. and Chappell, J. (2010) History of Australian aridity - chronology in the evolution of arid landscapes. In: Bishop, P. and Pillans, B. eds., Australian Landscapes. Geological Society of London, Special Publications, 346, 121-139. [invited review].
Fujioka, T., Fifield, L.K., Stone, J.O., Vasconcelos, P.M., Tims, S.G. and Chappell, J. (2010) In situ cosmogenic Mn-53 production rate from ancient low-denudation surface in tropic Brazil. Nuclear Instruments and Methods in Physics Research B, 268, 1209-1213.
Fifield, L.K., Tims, S.G., Fujioka, T., Hoo, W.T. and Everett, S.E. (2010) Accelerator mass spectrometry with the 14UD accelerator at the Australian National University. Nuclear Instruments and Methods in Physics Research B, 268, 858-862.
Fujioka, T., Chappell, J., Fifield, L.K. and Rhodes, E.J. (2009) Australian desert dune fields initiated with Pliocene-Pleistocene global climatic shift. Geology, 37, 51-54.
Fujioka, T., Chappell, J., Honda, M., Yatsevich, I., Fifield, L.K. and Fabel, D. (2005) Global cooling initiated stony deserts in central Australia 2-4 Ma, dated by cosmogenic Ne-21 and Be-10. Geology, 33, 993-996.
Rhodes, E., Chappell, J., Fujioka, T., Fitzsimmons, K., Magee, J., Aubert, M. and Hewitt, D. (2005) The history of aridity in Australia: Chronological developments. In: Roach, I.C., ed., Regolith 2005 - Ten years of CRC LEME. CRC LEME, 265-268.
Matsumoto, T., Morishita, T., Matsuda, J., Fujioka, T., Takebe, M., Yamamoto, K. and Arai, S. (2005) Noble gases in the Finero phlogopite-peridotites, western Italian Alps. Earth and Planetary Science Letters, 238, 130-145.