I am a physical geographer interested in geomorphology, paleolimnology, and especially varved lake sediments with their fascinating potential for reconstructions of environmental changes. Since the year 2014, I have been a Professor of Geography at the University of Gdansk where I lead the Environmental Change Reconstruction Laboratory.
ORCID ID: https://orcid.org/0000-0003-1749-5882
In our research group we study past environmental change possible to reconstruct based on lake sediments. We focus on climate-related and human-related changes recorded over the last several thousand years. For correct interpretation of sediment records, we also investigate the conditions of modern sedimentation processes in lakes. We use mainly geochronological, sedimentological, geochemical, and biological methods.
Using of alpha and gamma spectroscopy in environmental issues, e.g. dating of sediments with short-lived isotopes (Pb-210 and Cs-137)
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Krajewska M., Szymczak-Żyła M., Tylmann W., Kowalewska G. 2020 Climate change impact on primary production and phytoplankton taxonomy in Western Spitsbergen fjords based on pigments in sediments. Global and Planetary Change, 189: 103158. https://doi.org/10.1016/j.gloplacha.2020.103158
Żarczyński M., Wacnik A., Tylmann W. 2019 Tracing lake mixing and oxygenation regime using the Fe/Mn ratio in varved sediments: 2000 year-long record of human-induced changes from Lake Żabińskie (NE Poland). Science of the Total Environment, 657: 585–596. https://doi.org/10.1016/j.scitotenv.2018.12.078
Schneider T., Hampel H., Mosquera P.V., Tylmann W., Grosjean M. 2018 Paleo-ENSO revisited: Ecuadorian Lake Pallcacocha does not reveal a conclusive El Niño signal. Global and Planetary Change, 168: 54–66. https://doi.org/10.1016/j.gloplacha.2018.06.004
Hernández-Almeida I., Grosjean M., Gómez Navarro J.J., Larocque-Tobler I., Bonk A., Enters D., Ustrzycka A., Piotrowska N., Przybylak R., Wacnik A., Witak M., Tylmann W. 2017 Resilience, rapid transitions and regime shifts: fingerprinting the responses of Lake Zabińskie (NE Poland) to climate variability and human disturbance since 1000 AD. The Holocene, 27: 258-270. http://dx.doi.org/10.1177/0959683616658529
Tylmann W., Bonk A., Goslar T., Wulf S., Grosjean M. 2016 Calibrating 210Pb dating results with varve chronology and independent chronostratigraphic markers: Problems and implications. Quaternary Geochronology, 32: 1-10. http://dx.doi.org/10.1016/j.quageo.2015.11.004