• Nonlinear dynamics and time series analysis
• Modeling of complex systems
• Data assimilation (adjoint and Kalman methods)
• Oceanography and Earth rotation

• 2012–: Research unit funded by Deutsche Forschungsgemeinschaft (FOR 584): "Earth Rotation and Global Dynamic Processes", Project 10: "Long-term ERP time series as indicators for global climate variability and climate change"
• 2009-2012: Research unit funded by Deutsche Forschungsgemeinschaft (FOR 584): "Earth Rotation and Global Dynamic Processes", Project 2: (EROC) "Earth rotation and the ocean's circulation"

University and school education:

• 1998: Diploma at German secondary school: Max-Steenbeck-Gymnasium with enhanced math., nat. and techn. education, Cottbus
• 1999–2005: University of Potsdam. Diploma in Physics. Thesis: Influence of atmospheric noise on the generation of interannual El Niño variability

• 2004: Student research assistant in the "Photonik" group of Prof. Dr. R. Menzel, Univ. Potsdam
• 2004–2006: Student research assistant in "Nonlinear Dynamics" group of Prof. Dr. J. Kurths, Univ. Potsdam
• 2006–2009: PhD student at Alfred Wegener Institute for Polar and Marine Research, Bremerhaven. Thesis: The influence of the oceans on the Earth's rotation.
• Since Aug 2009: Research associate (PostDoc) at the Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences

• Saynisch, J.; Wenzel, M.; Schröter, J.: Assimilation of Earth rotation parameters into a global ocean model: excitation of polar motion. Nonlinear Processes in Geophysics, 18 (5), 581-585, doi:10.5194/npg-18-581-2011, 2011.
• Saynisch, J.; Thomas, M.: Ensemble Kalman-Filtering of Earth rotation observations with a global ocean model. Journal of Geodynamics, GEOD1089, doi:10.1016/j.jog.2011.10.003, 2011.
• Saynisch, J.; Wenzel, M.; Schröter, J.: Assimilation of Earth rotation parameters into a global ocean model: length of day excitation. Journal of Geodesy, doi:10.1007/s00190-010-0416-0, 2010.
• Saynisch, J.; Kurths, J.; Maraun, D.: A Conceptual ENSO Model under Realistic Noise Forcing. Nonlinear Processes in Geophysics, 13, 275-285, 2006. PDF