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Institute of Energy and Climate Research

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Atmospheric Modelling

Predicting atmospheric composition and understanding its role in the Earth system

Our central goal is to expand our understanding of tropospheric processes and accurately model the atmospheric composition. For that we constantly probe for unobservable processes to explain the chemical state of the atmosphere. Our research focuses on multiphase processes involving tropospheric oxidants and pollutants in the gas and condensed phases. We investigate to which extent observations are predictable and informative about the internal states of the atmosphere. This knowledge allows us to reliably predict air quality and optimize the emissions of pollutants. Furthermore, we explore the interactions between weather and atmospheric composition and how the latter mediates the coupling between the biosphere and the climate system.

Formic Acid at surface

The research themes are:

Multiphase Chemical Kinetics

Atmospheric Aerosol Modelling

Air Quality and Emission Optimization

Atmospheric Chemistry in the Earth System

Cross-cutting activity within EoCoE/EoCoE-II (Energy oriented Centre of Excellence) and HAF (Helmholtz Analytics Framework) and in collaboration with JSC:

Energy Meteorology

Latest News

Latest Publications

Rosanka, S., Sander, R., Wahner, A., and Taraborrelli, D.: Oxidation of low-molecular-weight organic compounds in cloud droplets: development of the Jülich Aqueous-phase Mechanism of Organic Chemistry (JAMOC) in CAABA/MECCA (version 4.5.0), Geosci. Model Dev., 14, 4103–4115,, 2021.

Oxidation of glyoxal (CHOCHO) by radicals in JAMOC

Rosanka, S., Sander, R., Franco, B., Wespes, C., Wahner, A., and Taraborrelli, D.: Oxidation of low-molecular-weight organic compounds in cloud droplets: global impact on tropospheric oxidants, Atmos. Chem. Phys., 21, 9909–9930,, 2021.

Graphical representation of inorganic aqueous-phase ozone chemistry based on Staehelin et al. (1984).

Rosanka, S., Franco, B., Clarisse, L., Coheur, P.-F., Pozzer, A., Wahner, A., and Taraborrelli, D.: The impact of organic pollutants from Indonesian peatland fires on the tropospheric and lower stratospheric composition, Atmos. Chem. Phys., 21, 11257–11288,, 2021.

Illustration of the impact of VOC emissions from the Indonesian peatland fires on the atmospheric composition.

Franco, B., Blumenstock, T., Cho, C. et al. Ubiquitous atmospheric production of organic acids mediated by cloud droplets. Nature 593, 233–237 (2021).

Taraborrelli, D., Cabrera-Perez, D., Bacer, S., Gromov, S., Lelieveld, J., Sander, R., and Pozzer, A.: Influence of aromatics on tropospheric gas-phase composition, Atmos. Chem. Phys., 21, 2615–2636,, 2021.


Emmerichs, T., Kerkweg, A., Ouwersloot, H., Fares, S., Mammarella, I., and Taraborrelli, D.: A revised dry deposition scheme for land–atmosphere exchange of trace gases in ECHAM/MESSy v2.54, Geosci. Model Dev., 14, 495–519,, 2021.


Rosanka, S., Vu, G. H. T., Nguyen, H. M. T., Pham, T. V., Javed, U., Taraborrelli, D., and Vereecken, L.: Atmospheric chemical loss processes of isocyanic acid (HNCO): a combined theoretical kinetic and global modelling study, Atmos. Chem. Phys., 20, 6671–6686,, 2020.


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Open positions

If you are interested in joining the modelling group, please consult the job openings of IEK-8 at this link or contact us directly. We also encourage students to inquire MS and PhD thesis projects.