Dr. Thomas Berndt

 
2018-01-21 11.56.15
Read more about Viscous Remananent Magnetization Dating of Floods

Tom is currently assistant professor at Peking University, since finishing his Boya Postdoctoral Fellowship. Before, he obtained his PhD from Imperial College London for his work on viscous remanent magnetization dating of floods in the Natural Magnetism Group of Dr. Adrian Muxworthy. He holds a MSc in Geophysics from the University Complutense Madrid, Spain and a BSc in Physics from the University of Southampton.

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Thomas Berndt on ResearchGate

Research

C03
Read more about Unmixing of FORC diagrams & complex mineralogies

I am interested in the development of new rock magnetic methods to help solve paleomagnetic and environmental problems. For this, I use a combination of physical theoretical considerations, numerical models, rock magnetic experiments, as well as geological field work. A particular interest of mine is the effect thermal fluctuations have on rock magnetic properties and on remanence acquisition. Some of my previous and current research projects include viscous remanent magnetization dating of flood events, modelling hysteresis and remanence behaviour of mixtures of different magnetic minerals and domain states, numerical modelling of biogenic magnetosomes, measuring relaxation times and blocking times of rock specimens.

Micromagnetic model
Read more about micromagnetic models of magnetosomes

Curriculum Vitae

  • Assistant Professor, Department of Geophysics, School of Earth and Space Sciences, Peking University, Beijing, China (from 10/2019)
  • Post-doctoral fellow, School of Earth and Space Sciences, Peking University, Beijing, China (from 2017)
  • PhD in Geophysics, Imperial College, London, UK (2013-2016)
  • M.Sc. Meteorology and Geophysics, Universidad Complutense de Madrid, Spain (2010-2013)
  • B.Sc. Physics, School of Physics, University of Southampton, UK (2007-2010)

Professional

  • Risk Management Consultant at d-fine Ltd, London, UK (2016-2017)
  • Part-time software developer at Genese.de, Bremen, Germany (2007-2013)
  • Quality & Reliability Assurance Intern at Texas Instruments, Freising, Germany (06-08/2008)
  • Part-time software developer at Rheinmetall Defence Electronics, Bremen, Germany (2005-2006)
  • Free-lance software developer for “Reha-Haus” nursing home, Bremen, Germany (2003-2006)

Publications

  • Berndt, T.A., Chang, L., & Pei, Z. Mind the gap: Towards a biogenic magnetite palaeoenvironmental proxy through an extensive finite-element micromagnetic simulation. Earth and Planetary Science Letters, in press.
  • Berndt, T. A., Chang, L. (2019). Waiting for Forcot: Accelerating FORC Processing 100x using a Fast-Fourier-Transform Algorithm. Geochemistry, Geophysics, Geosystems, 20, https://doi.org/10.1029/ 2019GC008380, 2019.
  • Chang, L., Harrison, R.J., Berndt, T.A. (2019). Micromagnetic simulation of magnetofossils with realistic size and shape distributions: Linking magnetic proxies with nanoscale observations and implications for magnetofossil identification. Earth and Planetary Science Letters, 527, https://doi.org/10.1016/j.epsl.2019.115790.
  • Berndt, T. A., & Chang, L. (2018). Theory of stable multi‐domain thermoviscous remanence based on repeated domain‐wall jumps. Journal of Geophysical Research B: Solid Earth, 123, 10,399-10417, https://doi.org/10.1029/2018JB016816
  • Berndt, T. A., Chang, L., Wang, S., & Badejo, S. (2018). Time-Asymmetric FORC Diagrams: A New Protocol for Visualizing Thermal Fluctuations and Distinguishing Magnetic Mineral Mixtures. Geochemistry, Geophysics, Geosystems, 19, 3056-3070, https://doi.org/10.1029/2018GC007669
  • Chang, L., Harrison, R. J., Zeng, F., Berndt, T. A., Roberts, A. P., Heslop, D., & Zhao, X. (2018). Coupled microbial bloom and oxygenation decline recorded by magnetofossils during the Palaeocene–Eocene Thermal Maximum. Nature Communications, 9(4007), 1–9. https://doi.org/10.1038/s41467-018-06472-y
  • Berndt, T., Paterson, G. A., Cao, C., & Muxworthy, A. R. (2017). Experimental test of the heating and cooling rate effect on blocking temperatures. Geophysical Journal International, 210(1), 255–269. https://doi.org/10.1093/gji/ggx153
  • Berndt, T., & Muxworthy, A. R. (2017). Dating Icelandic glacial floods using a new viscous remanent magnetization protocol. Geology, 45(4), 339–342. https://doi.org/10.1130/G38600.1
  • Berndt, T., Ramalho, R. S., Valdez-Grijalva, M. A., & Muxworthy, A. R. (2017). Paleomagnetic field reconstruction from mixtures of titanomagnetites. Earth and Planetary Science Letters, 465, 70–81. https://doi.org/10.1016/j.epsl.2017.02.033
  • Berndt, T. (2016). Theory of viscous remanent magnetization acquisition and its application to flood dating. Imperial College London.
  • Berndt, T., Muxworthy, A. R., & Fabian, K. (2016). Does size matter? Statistical limits of paleomagnetic field reconstruction from small rock specimens. Journal of Geophysical Research B: Solid Earth, 121(1), 15–26. https://doi.org/10.1002/2015JB012441
  • Berndt, T., Muxworthy, A. R., & Paterson, G. A. (2015). Determining the magnetic attempt time τ0, its temperature dependence, and the grain size distribution from magnetic viscosity measurements. Journal of Geophysical Research: Solid Earth, 120. https://doi.org/10.1002/2015JB012283
  • Berndt, T., Ruiz-Martínez, V. C., & Chalouan, A. (2014). New constraints on the evolution of the Gibraltar Arc from palaeomagnetic data of the Ceuta and Beni Bousera peridotites (Rif, northern Africa). Journal of Geodynamics. https://doi.org/10.1016/j.jog.2014.09.014

Talks

  • Berndt, T. A., Chang, L., & Wang, S. (06/2018) Thermal fluctuations in FORC diagrams: the missing link between FORC diagrams and natural remanence acquisition. 16th Castle Meeting, Checiny, Poland
  • Berndt, T. A., Ramalho, R. D. S., Valdez-Grijalva, M. & Muxworthy, A. R. (06/2018) Paleomagnetic field reconstruction from mixtures of titanomagnetites. 16th Castle Meeting, Checiny, Poland
  • Berndt, T., Chang, L., & Wang, S. (01/2018). Time-asymmetric FORC diagrams: distinguishing magnetic phases based on their viscosity. At: Magnetic Interactions Conference, Oxford, UK.
  • Berndt, T., Muxworthy, A. R. (06/2016) Viscous Remanent Magnetization Dating of Floods. At: Beijing Earth and Planetary Interior Symposium in Beijing, China.
  • Berndt, T. (05/2016) Invited lecture for the interested public: Magnetic dating of floods. At: China University of Mining and Technology in Xuzhou, Jiangsu Province, China.
  • Berndt, T., Muxworthy, A. R. (04/2016) Magnetic dating of storm floods, jökulhlaups and tsunamis. At: EGU General Assembly 2016 in Vienna, Austria.
  • Berndt, T., Muxworthy, A. R. (06/2015) Viscous remanent magnetization dating of floods. At: International Union of Geodesy and Geophysics General Assembly 2015 in Prague, Czech Republic.

Teaching

  • Co-supervisor of one MSc student and one undergraduate student working on micromagnetic models at Peking University (2017-2018)
  • Co-instructor at Peking University: Lectures in Rock Magnetism and geodynamic models (04-06/2018)
  • Deutsche SchülerAkademie 2015, Brunswick, Germany:
    Planned, designed and taught a 2-week/50h course on computer art for 15 high school students in close collaboration with a co-course leader, teaching Java in the context of modern art. Also organized a 10h Chinese course, a field trip to a mine and a public exhibition of the student’s artworks.
  • Geophysics Bootcamp:
    Led and instructed a GPS survey team of M.Sc. students to carry out a survey on an oilfield, providing improved geophysical maps for the crude oil producer Wintershall GmbH.
  • Teaching Assistant: Seismic techniques, Numerical Methods 2 (Solving PDEs in C++), Advanced Programming for Geoscientists (C++), Geophysical Modelling (Python), Fire and Ice (Ice-sheet models), Programming for Geoscientists (Python)
  • Outreach: UK Space Design Competition (Volunteer), Queen Mary’s Grammar School (Presentations to raise interest in geosciences and Imperial College)

Awards

  • China Postdoctoral Science Fund, 1-12/2019, 10000€
    Research grant (80000 CNY) for the magnetic dating of tsunami deposits in the Hawaiian Islands.
  • Institute of Rock Magnetism visiting research fellowship, 12/2017, 4750$
    Grant covering travel to (750$) and instrument use at (4000$) the Institute of Rock Magnetism of the University of Minnesota to carry out research on the effect of cooling rates on blocking temperatures.
  • British Council research grant, 12/2015, £3000
    Research grant to study the effect of heating and cooling rates on blocking temperatures at the Chinese Academy of Sciences in Beijing with Prof. Greig Paterson.
  • Institute of Rock Magnetism visiting research fellowship, 12/2015, 4750$
    Grant covering travel to (750$) and instrument use at (4000$) the Institute of Rock Magnetism of the University of Minnesota to carry out research on the behaviour of magnetic particles under non-constant temperatures.
  • IC Trust Conference travel grant, 06/2015, £400
    Travel grant to give a talk titled “Viscous remanent magnetization dating of cataclysmic floods in Iceland” at the International Union of Geodesy and Geophysics General Assembly in Prague 2015.
  • Institute of Rock Magnetism visiting research fellowship, 09/2014, 4750$
    Grant covering travel to (750$) and instrument use at (4000$) the Institute of Rock Magnetism of the University of Minnesota to develop a new method to determine the atomic attempt time τ0 and the grain size distribution.
  • Travel grant for summer school and research placement in Beijing, 06/2014, £300
    Grant to travel to Beijing and participate in a PhD summer school on international collaboration in science at Tsinghua University and to spend three weeks at the Chinese Academy of Sciences to develop a method to determine the atomic attempt time τ0 with Prof. Greig Paterson.

Fieldwork

  • Maio & Santiago Island, Cape Verde, 02/2018: Sampling tsunami conglomerates and boulders with R. Ramalho
  • Santiago Island, Cape Verde, 02/2016: Sampling tsunami boulders with R. Ramalho and M. Valdez-Grijalva
  • Seacliff, Scotland, 09/2015: Sampling flood boulders with A. Muxworthy and A. Hall
  • Vatnajökull & Mýrdalsjökull, Iceland, 08/2013: Sampling flood boulders with A. Muxworthy

 

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