Dr Toshiyuki Fujioka
Staff Profile
Role at ANSTO
Toshi is a research scientist in the AMS Cosmogenic Nuclide Dating Group within the Isotopes in Climate Change Project. His research focuses on development of cosmogenic exposure dating based on a series of in situ cosmogenic nuclides (Be-10, Ne-21, Al-26, Mn-53), and its application to the study of Australian landscapes and their response to climate changes at timescales from thousands to million years.
Expertise
In situ cosmogenic nuclides, exposure dating, accelerator mass spectrometry, landscape evolution, palaeoclimate, geomorphology, geochemistry, physics.
Current projects
• Australian deserts: past extent and its impact on the evolution of desert species — investigate i) chronology and spacial distribution of desert landforms, such as stony deserts and dune fields, and ii) fluvial history of arid rivers, e.g., Cooper Creek, in central Australia, using cosmogenic exposure, burial, and profile dating, with implication to species evolution within arid Australia. Collaboration with Gerald Nanson, John Jansen, Tim Cohen, Sam Marx (U of Wollongong), Paul Hesse (Macquarie-u), Stephen Tooth (Aberystwyth-u, UK), Bob Craddock (Smithsonian Inst., US), Mitzy Pepper (ANU). Refs.: Fujioka et al. (2005, 2009), Fujioka and Chappell (2010, 2011), Jansen et al. (2013), ARC-DP13 by Nanson "Anabranching rivers; the arteries of arid Australia".
• Extreme climate events and landscape evolution in monsoonal Australia — constrain i) timing of extreme events, such as storm and cyclone induced floods, and ii) rate and timing of long-term landscape modification within monsoon affected northern Australia, via cosmogenic nuclide modeling of flood generated deposits and exposure age and erosion rate estimation. Collaboration with David Fink (ANSTO), Gerald Nanson, Hendrik May (UoW). Refs.: Fujioka et al. (in review), ARC-DECRA12 by May "Wet and dry of tropical Australia".
• Catchment response to climate changes and sediment dynamics in Murray Darling Basin — investigatete temporal variation of catchment-scale denudation rates (sediment production), sediment transport and storage for the last glacial cycle in the Murray Darling Basin, using a combined approach of cosmogenic nuclide-based denudation rates and U-series-based sediment transport time. Collaboration with Tony Dosseto (UoW), Paul Hesse, Tim Ralph, Kirstie Fryirs (Macq.-u), David Fink (ANSTO). Refs.: AINSE Award 2012 by Ralph "Unravelling catchment and river response to hydrological change", ARC-DP14 by Dosseto "Quantifying soil loss in Australia's food basket" (pending).
• Paleoclimate and human migration in lower Danube River, Romania — collaboration with Kat Fitzsimmons (Max Plank Inst., Germany).
• Chronology of Kalahari dunefields in southern Africa — collaboration with Abi Stone (U of Oxford, UK).
• Glacial lake outburst in Siberia — collaboration with John Jansen (UoW), Martin Margold (Stockholm-U, Sweden), David Fink (ANSTO). Ref.: AINSE Award 2012 by Jansen "Dating the largest known glacial outburst flood, Lake Vitim, Siberia".
• Formation and stability of sandstone pillars in central China — collaboration with Hendrik May (UoW), Huang He (China Acad. Sci., China), David Fink (ANSTO).
• Coastal stability and erosion in southeastern Australia: influence of sea level changes — collaboration with David Fink (ANSTO), Colin Woodroffe (UoW), David Kennedy (U of Melbourne).
Toshi also works on methodological development for a new in situ cosmogenic nuclide, manganese-53 (Mn-53), in collaboration with ANU AMS Group, led by Keith Fifield (ref.: Fujioka et al., 2010), and also contibutes to development of CO2 extraction lines for in situ C-14 method at U of Canberra, led by Duanne White.
Qualifications
- PhD in Earth Science, ANU, Canberra 2007.
- MSc in Geochemistry. Osaka-u, Japan, 2001
- BSc in Physics. Osaka-u, Japan, 1999.
Publications
Fujioka, T., Fink, D., Nanson, G., Mifsud, C. and Wende, R. (2013) Flood flipped boulders: in situ cosmogenic Be-10 evidence for extreme events during the Quaternary in the tropics of Australia. Geology. In review.
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.
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.
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.
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.
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.
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.
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.