Haus 1, Raum 0.04
Dienstag: 14.00 - 16.00 Uhr
since 2018: Researcher at the Institute of Environmental Science and Geography, University of Potsdam, Soil Science and Geomorphology
2014-2018: PhD-Researcher, PhD project “Signals stored in sediment: Fluvial sediments as records of landscape evolution”, Institute of Earth and Environmental Science University of Potsdam and the Helmholtz Centre Potsdam GFZ German Research Centre for Geoscience, supervised by Prof. Taylor Schildgen and Prof. Manfred Strecker (submitted Nov. 2018, defended March 2019)
2015: Research visit at Saint Anthony Falls Laboratory, Minneapolis, USA; flume experiments (4 months)
2012-2014: Head organizer (2 years) and Research Assistant (2.5 years) of the preparation laboratory for cosmogenic nuclides, University of Potsdam, Germany
2012: Research assistant for 3D seismic measurements at the CO2 injection pilot site Ketzin, Germany (1 month)
2011: Research assistant of a polar expedition to Svalbard and the Arctic Ocean, Norwegian Polar Institute, Tromsø, Norway
2009-2010: Research assistant in the working group ‘In-vitro toxicology and biomedicine’, University of Konstanz, Germany
2011-2014:MSc of Geoscience, Institute of Earth and Environmental Science, University of Potsdam, Germany Title of thesis: ‘Understanding organic matter transport in the NW Argentine Andes using leaf waxes and their stable isotope composition’
2011: Erasmus exchange, Institute of Biology, University of Tromø, Norway (9 months)
2007-2010: BSc of Biology, Institute of Biology, University of Konstanz, Germany Title of thesis: ‘Mitochondrial dynamics in mammalian cells’
Awards and Stipends
2018: Award for best oral presentation (Central European Conference on Geomorphology and Quaternary Sciences in Giessen, Germany)
2017: Outstanding Student Paper Award (American Geophysical Union)
2016: Outstanding Student Poster and PICO Award (European Geophysical Union)
2015-2019: Several travel support stipends from the Potsdam Graduate School (total 2750 €)
Research experience and skills
I am generally interested in fluvial and hillslope geomorphology and the transport of sediment along sediment-routing systems or source-to-sink systems. In particular, I try to understand how information on environmental condititions or hillslope processes are translated into sedimentary signals and how those signals are potentially modified during sediment transport. I study this by combining field and laboratory techniques.
Cosmogenic nuclide analysis (10Be, 26Al): physical and chemical mineral separation, ion exchange chromatography
Biomarker (n-alkane) analysis: Compound specific isolation and stable isotope (δD, δ13C) analysis
Physical experiments in a flume: Channel response, terrace formation and sediment-signal disruption due to changing boundary conditions
2017: New Zealand - Three weeks field campaign in the Southern Alps and Fjordlands. Sample collection in catchments and landslides for cosmogenic radionuclide analysis (10Be, 14C), grain size distribution, drone survey to generate DEMs of landslide scars.
2016: Argentina -3 weeks field campaign investigating catchment – alluvial fan systems in the Santa Maria Basin. Sampling of boulders for fan surface exposure dating with cosmogenic radionuclides and grain size analysis. Sampling for stable isotope analysis in biomarkers in the Pastos Grandes Basin on the Puna Plateau.
2015: Argentina -5 weeks field campaign including differential GPS surveys of terrace surfaces in the Toro Basin, sample collection for cosmogenic burial dating of fluvial terraces, river grain size analysis, and sampling for geochronological analysis of lake sediments (14C).
2014: Argentina -6 weeks field campaign to collect samples for a geochronological analysis of fluvial terraces (10Be depth profiles, volcanic ashes), catchment mean denudation rates (10Be), river grain size analysis, and collection of fluvial sediments and stream waters for stable isotope analysis in the Toro Basin.
2013: Argentina - 4 weeks field campaign to sample for surface exposure dating of an alluvial fan and for catchment mean denudation rates (10Be) in the Humahuaca Basin; sampling of river sediment and soil transects for stable isotope analysis in biomarkers (n-alkanes).
Lectures on Geomorphology within ‘Allgemeine Physische Geographie’, Bachelor of Education, Institute of Environmental Science and Geography (summer 2019)
Field School ‘Geoökologisches Landschaftspraktikum’ to the Harz mountains in Germany (geomorphology-part), Bachelor of Geoecology, Institute of Environmental Science and Geography (summer 2018, summer 2019)
Field excursion and GIS seminar ‘Digital Elevation models’, Bachelor of Geoecology, Institute of Environmental Science and Geography (winter 2018/2019)
Seminar series for ‘A Systems Approach to Earth Science’ Master of Public Management – GeoGovernance, UP Transfer GmbH (winter 2016/2017, summer 2018)
Field trip to the Rheingraben and Central Alps, Bachelor of Geoscience, Institute of Earth and Environmental Science (summer 2017)
Paper seminar ‘From source to sink’, Master of Geoscience, Institute of Earth and Environmental Science (summer 2016)
Bufe, A., Turowski, J.M., Burbank, D., Paola, C., Wickert, A.D., Tofelde, S., (in revision). Controls on the rate and extent of lateral channel migration. Earth Surface Processes and Landforms.
Tofelde, S., Savi, S., Wickert, A.D., Bufe, A., Schildgen, T.F. (accepted). Alluvial channel response to environmental perturbations: Fill-terrace formation and sediment-signal disruption. Earth Surf. Dyn. Discuss.
D’Arcy, M., Schildgen, T.F., Strecker, M.R., Wittmann, H., Duesing, W., Mey, J., Tofelde, S., Weissmann, P., Alonso, R.N., 2019. Timing of past glaciation at the Sierra de Aconquija, northwestern Argentina, and throughout the Central Andes. Quat. Sci. Rev. 204, 37–57.
Tofelde, S., Duesing, W., Schildgen, T.F., Wickert, A.D., Wittmann, H., Alonso, R.N., Strecker, M., 2018. Effects of deep‐seated versus shallow hillslope processes on cosmogenic 10Be concentrations in fluvial sand and gravel. Earth Surf. Process. Landforms 43, 3086–3098.
Tofelde, S., Schildgen, T.F., Savi, S., Pingel, H., Wickert, A.D., Bookhagen, B., Wittmann, H., Alonso, R.N., Cottle, J., Strecker, M.R., 2017. 100 kyr fluvial cut-and-fill terrace cycles since the Middle Pleistocene in the southern Central Andes, NW Argentina. Earth Planet. Sci. Lett. 473, 141–153.
Savi, S., Schildgen, T.F., Tofelde, S., Wittmann, H., Scherler, D., Mey, J., Alonso, R.N., Strecker, M.R., 2016. Climatic controls on debris-flow activity and sediment aggradation: The Del Medio fan, NW Argentina. J. Geophys. Res. Earth Surf. 2424–2445.
Rohrmann, A., Sachse, D., Mulch, A., Pingel, H., Tofelde, S., Alonso, R.N., Strecker, M.R., 2016. Miocene orographic uplift forces rapid hydrological change in the southern central Andes. Sci. Rep. 6, 35678.
Nieto-Moreno, V., Rohrmann, A., van der Meer, M.T.J., Sinninghe Damsté, J.S., Sachse, D., Tofelde, S., Niedermeyer, E.M., Strecker, M.R., Mulch, A., 2016. Elevation-dependent changes in n-alkane δ D and soil GDGTs across the South Central Andes. Earth Planet. Sci. Lett. 453, 234–242.
Schildgen, T.F., Robinson, R.A.J., Savi, S., Phillips, W.M., Spencer, J.Q.G., Bookhagen, B., Scherler, D., Tofelde, S., Alonso, R.N., Kubik, P.W., Binnie, S.A., Strecker, M.R., 2016. Landscape response to late Pleistocene climate change in NW Argentina: Sediment flux modulated by basin geometry and connectivity. J. Geophys. Res. Earth Surf. 121, 392–414.
Schwanghart, W., Bernhardt, A., Stolle, A., Hoelzmann, P., Adhikari, B.R., Andermann, C., Tofelde, S., Merchel, S., Rugel, G., Fort, M., 2015. Repeated catastrophic valley infill following medieval earthquakes in the Nepal Himalaya. Science (147-150). 351, 1–9.