Aaron Röhler

Aaron Röhler in dark turtleneck sweater.

M.Sc. Aaron Röhler

GEO Room 5160
Klagenfurter Straße 2-4
28359 Bremen, Germany

Phone: +49 421 218 65136

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The focus of my PhD project is on the study of fluid-rock reactions in active volcanoes. Hydrothermal activities inside active volcanoes can influence not only the stability of the volcanic edifice itself, but also the eruptive behavior of the volcano, and thus have a major impact on various causes of geohazards in volcanically active areas. To investigate the interplay between magmatic and hydrothermal processes, my study focuses on Telica, a persistently unstable stratovolcano in the Central American volcanic arc. Heat and gases generated by the rising magma interact with meteoric water to drive a long-lasting hydrothermal system that can destabilize the volcanic edifice and possibly even trigger eruptions.

In my dissertation, I will develop a structural and petrological model of the Telica magmatic and hydrothermal system. The main focus of my research will be to quantitatively investigate the element fluxes and fluid-rock reactions caused by the surface hydrothermal activity in the volcanic edifice, as well as their effects on the eruptive behavior of the volcano.

Curriculum vitae

Scientific career

since Nov. 2022PhD student at the research group "Petrology of the Ocean Crust" at Bremen University
Sept. 2022MSc. degree in Marine Geosciences, Bremen University
2018-2022MSc. "Marine Geosciences" at Bremen University
Sept. 2018BSc. degree in Geosciences, Universität Bremen
2013-2018BSc. "Geosciences" at Bremen University


  • Three men in blue work clothes with hard hats and protective gloves stand on the deck of the research vessel Meteor. They hold wooden slats in their hands and are waiting for the arrival of the gravity corer.

    2022: M183 - RIFLOR-1 (Reykjanes Ridge)

    Ponta Delgada (Azores, Portugal) - St. John's (Newfoundland, Canada) / 13.07.2022 - 09.08.2022

  • A scientist squats near the railing on the deck of the research vessel Maria S. Merian, crushing rock samples with the help of a geologist's hammer.

    2019: MSM86 - VESTERIS (Vesteris-Seamount, Greenland Basin)

    Longyearbyen (Norway) - Emden (Germany) / 18.08.2019 - 16.09.2019

  • Aerial view of the research vessel Polarstern surrounded by sea ice. The sun is shining in the cloudless sky.

    2019: PS118 (Weddel Sea & Powell Basin)

    Punta Arenas (Chile) - Punta Arenas (Chile) / 09.02.2019 - 10.04.2019

  • A scientist stands on the deck of the research vessel Maria S. Merian wearing a blue and black jacket and wool cap. The stern of the ship and the southern tip of Greenland can be seen in the background.

    2018: MSM73 - RACE II (North Atlantic & Labrador Sea)

    Cadiz (Spain) - St. John's (Canada) / 06.04.2018 - 22.05.2018

  • The research vessel Meteor lies in the harbor of Ponta Delgada at night, the decks are brightly lit.

    2012: M87-3b - CATNEC (Landsort Deep & Gotland Basin)

    Rostock (Germany) - Rostock (Germany) / 12.06.2012 - 25.06.2012


  • Bohrmann G, Streuff K, Römer M, Knutsen S-M, Smrzka D, Kleint J, Röhler A, Pape T, Sandstå NR, Kleint C, Hansen C, dos Santos Ferreira C, Walter M, de Paula Santos GM, Bach W (2024): Discovery of the first hydrothermal field along the 500-km-long Knipovich Ridge offshore Svalbard (the Jøtul field). Scientific Reports  14, 10168.
    doi:10.1038/s41598-024-60802-3 |
  • Röhler A, Beyer C, Klügel A, Bach W, Haase K (2024): Vesteris Seamount-Magma plumbing dynamics and petrological evolution of an alkaline intra-plate volcano of non-plume and non-rifting origin. European Geosciences Union General Assembly 2024, Vienna, Austria.



Master Thesis

  • Röhler A (2022): Petrological Evolution of Vesteris Seamount – Thermobarometric and Geochemical Investigation of an Alkaline Intraplate Volcano. Master Thesis, Bremen University

Bachelor Thesis

  • Röhler A (2018): Alternative Methode zur Bestimmung der Sauerstofffugazität über das Olivin-Schmelze Equilibrium an Tephriten der 2014-15 Eruption auf Fogo. Bachelor Thesis, Bremen University