Holger Metzler

PhD Student

Max Planck Institute for Biogeochemistry, Postbox 10 01 64 - 07701 Jena, Germany
+ 49 3641

Research interests

Coming from mathematics with particular interest in stochastics and measure theory, I study soil system models. My research focuses on improving the scaling of nonlinear models from the microbial to the global scale.


  • 1990 - 1994: Primary school of Föritz

  • 1994 - 2002: 1. Staatliches Gymnasium Sonneberg

  • 2002 - 2008: Diploma in mathematics at Friedrich Schiller University Jena

    • Major subject: stochastics

    • Minor subject: theoretical computer sciences

    • Thesis title: Das Itô-Nisio-Theorem

  • 2008 - 2012: Ergodic Backward Stochastic Differential Equations in Infinite Dimensions at Università di Milano-Bicocca

  • 2012 - 2015: Teaching at Friedrich Schiller University Jena


  • 2012 - 2013: Lineare Algebra und Analytische Geometrie 1 (Lehramt Gymnasium), exercises, Prof D. Green, Friedrich Schiller University Jena

  • 2013 - 2014: Analysis II (Lehramt Regelschule), tutorial, Dr H. Kempka, Friedrich Schiller University Jena

  • 2014:

    • Grundlagen der Analysis für Informatiker, exercises, Dr E. Dietzel, Friedrich Schiller University Jena

    • Gewöhnliche Differentialgleichungen, exercises, Prof D. Hasler, Friedrich Schiller University Jena

  • 2014 - 2015: Mathematik für Chemie und Biogeowissenschaften, exercises, Dr C. Richter, Friedrich Schiller University Jena


  1. Sierra, C. A., Quetin, G. R., Metzler, H., & Müller, M. (2023). A decrease in the age of respired carbon from the terrestrial biosphere and increase in the asymmetry of its distribution. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, in press. https://doi.org/10.22541/essoar.168053817.70622717/v1
  2. Metzler, H., & Sierra, C. A. (2023). Information content and maximum entropy of compartmental systems in equilibrium. ArXiv. https://doi.org/10.48550/arXiv.2308.10956
  3. Sierra, C. A., Ceballos-Núñez, V., Hartmann, H., Herrera-Ramı́rez D., & Metzler, H. (2022). Ideas and perspectives: Allocation of carbon from net primary production in models is inconsistent with observations of the age of respired carbon. Biogeosciences, 19(16), 3727–3738. https://doi.org/10.5194/bg-19-3727-2022
  4. Azizi-Rad, M., Chanca, I., Herrera-Ramírez, D., Metzler, H., & Sierra, C. A. (2021). Stochastic and deterministic interpretation of pool models. Global Change Biology, 27(11), 2271–2272. https://doi.org/https://doi.org/10.1111/gcb.15581
  5. Sierra, C. A., Metzler, H., Müller, M., & Kaiser, E. (2021). Closed-loop and congestion control of the global carbon-climate system. Climatic Change, 165(1), 15. https://doi.org/10.1007/s10584-021-03040-0