Johannes Hörner

Baden-Württemberg State Institute for the Environment, Karlsruhe, Germany.

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I am a data scientist working on air quality modeling. Previously, I completed my PhD at the Department of Meteorology and Geophysics at the Universtity of Vienna on the topic of Snowball Earth.

news

Jun 1, 2025 I am starting as a data scientist at the Baden-Württemberg State Institute for the Environment
May 5, 2025 I sucessfully defended my PhD thesis: Clouds and bare sea ice as key factors in stabilizing waterbelt solutions for Snowball Earth
Feb 11, 2025 preprint published, under review for JGR-A: Making sense of bifurcation diagrams: a new framework to understand the role of clouds and bare sea ice for waterbelt states
May 3, 2024 talk at the Graz-Vienna Exoplanet Scientist Meeting IV
Apr 15, 2024 meet me at my poster at the EGU General Assembly

publications

  1. Sea-ice thermodynamics can determine waterbelt scenarios for Snowball Earth
    Johannes Hörner, and Aiko Voigt
    Earth System Dynamics, 2024
  2. How does cloud-radiative heating over the North Atlantic change with grid spacing, convective parameterization, and microphysics scheme in ICON version 2.1.00?
    Sylvia Sullivan, Behrooz Keshtgar, Nicole Albern, Elzina Bala, Christoph Braun, Anubhav Choudhary, Johannes Hörner, Hilke Lentink, Georgios Papavasileiou, and Aiko Voigt
    Geoscientific Model Development, 2023
  3. Ice-free tropical waterbelt for Snowball Earth events questioned by uncertain clouds
    Christoph Braun, Johannes Hörner, Aiko Voigt, and Joaquim G. Pinto
    Nature Geoscience, 2022
  4. Snowball Earth initiation and the thermodynamics of sea ice
    Johannes Hörner, Aiko Voigt, and Christoph Braun
    Journal of Advances in Modeling Earth Systems, 2022
  5. An idealized model sensitivity study on Dead Sea desertification with a focus on the impact on convection
    Samiro Khodayar, and Johannes Hoerner
    Atmospheric Chemistry and Physics, 2020