Published October 14, 2026 | Version 2.0
Software Open

City-scale Chemistry Transport Model EPISODE-CityChem

Authors/Creators

  • 1. ROR icon Helmholtz-Zentrum Hereon

Contributors

  • 1. ROR icon NILU
  • 2. ROR icon Helmholtz-Zentrum Hereon
  • 3. ROR icon National Observatory of Athens

Description

The CityChem extension, developed at Helmholtz-Zentrum Hereon is designed for treating complex atmospheric chemistry in urban areas and improved representation of the near-field dispersion (Karl et al., 2019). The model is an extension of the EPISODE dispersion model to enable chemistry/transport simulations of reactive pollutants on city scale. EPISODE is an Eulerian dispersion model developed at the Norwegian Institute for Air Research (NILU) appropriate for air quality studies at the local scale (Hamer et al., 2019). The EPISODE model and the CityChem extension are open source code subject to the Reciprocal Public License ("RPL") Version 1.5, https://opensource.org/licenses/RPL-1.5.

Notes

Britt Ann Høisker (NILU) is thanked for permission to distribute the CityChem extension to the EPISODE model under the RPL license. This work was partially funded by the ERA-PLANET trans-national project SMURBS (SMart URBan Solutions for air quality, disasters and city growth), Grant Agreement n. 689443, under the EU Horizon 2020 Framework Programme.

Files

cc_example_data_new2_202008.readme.txt

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Additional details

Funding

European Commission
ERA-PLANET - The European network for observing our changing planet 689443

References

  • Karl, M. Walker, S.-E., Solberg, S., and Ramacher, M. O. P. (2019) The Eulerian urban dispersion model EPISODE - Part 2: Extensions to the source dispersion and photochemistry for EPISODE-CityChem v1.2 and its application to the city of Hamburg. Geosci. Model Dev., 12, 3357-3399, https://doi.org/10.5194/gmd-12-3357-2019.
  • Hamer, P.D., Walker, S.-E., Sousa-Santos, G., Vogt, M., Vo-Thanh, D., Lopez-Aparicio, S., Ramacher, M.O.P., Karl, M. (2020) The urban dispersion model EPISODE. Part 1: A Eulerian and subgrid-scale air quality model and its application in Nordic winter conditions. Geosci. Model Dev., 13, 4323–4353, https://doi.org/10.5194/gmd-13-4323-2020
  • Lauenburg, M., Karl, M., Matthias, V., Quante, M., and Ramacher M. O. P. (2022) City Scale Modeling of Ultrafine Particles in Urban Areas with Special Focus on Passenger Ferryboat Emission Impact. Toxics, 10(1), 3, https://doi.org/10.3390/toxics10010003
  • Myriokefalitakis, S., Karl, M., Weiss, K. A., Karagiannis, D., Athanasopoulou, E., Kakouri, A., Bougiatioti, A., Liakakou, E., Stavroulas, I., Papangelis, G., Grivas, G., Paraskevopoulou, D., Speyer, O., Mihalopoulos, N. and Gerasopoulos, E. (2024) Analysis of secondary inorganic aerosols over the greater Athens area using the EPISODE–CityChem source dispersion and photochemistry model. Atmos. Chem. Phys. 24, 7815–7835, https://doi.org/10.5194/acp-24-7815-2024

Subjects

urban Air Quality Forecast for Hamburg
https://hcdc.hereon.de/urbanaqf/