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Fujioka-toshi

Dr Toshiyuki Fujioka

Earth Scientist/Accelerator Physicist

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. 

Expertise

In situ cosmogenic nuclides surface exposure dating, desert geomorphology, accelerator mass spectrometry, landscape evolution, palaeoclimate, geochemistry.

Current projects

*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).

 Qualifications

  • 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).