A new hybrid particle-puff approach to atmospheric dispersion modeling, implemented in the Danish Emergency Response Model of the Atmosphere (DERMA)

Tølløse, Kasper Skjold; Sørensen, Jens Havskov

doi:https://doi.org/10.5194/gmd-18-7763-2025

Articles | Volume 18, issue 20

https://doi.org/10.5194/gmd-18-7763-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/gmd-18-7763-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 20

Development and technical paper

|

24 Oct 2025

Development and technical paper |

| 24 Oct 2025

A new hybrid particle-puff approach to atmospheric dispersion modeling, implemented in the Danish Emergency Response Model of the Atmosphere (DERMA)

Kasper Skjold Tølløse and Jens Havskov Sørensen

Data sets

Øresund Experiment Data Bank N. G. Mortensen and S.-E. Gryning https://doi.org/10.5281/zenodo.161966

ERA5 hourly data on single levels from 1940 to present H. Hersbach et al. https://doi.org/10.24381/cds.adbb2d47

Real-time long-range dispersion model evaluation of the ETEX first release (https://remon.jrc.ec.europa.eu/past_activities/etex/site/index.html) G. Graziani et al. https://op.europa.eu/en/publication-detail/-/publication/ae88ef74-f74b-495e-aea4-5a278ba08700

Short summary

In this study, we improve the short-scale dispersion modeling capabilities of the Danish Emergency Response Model of the Atmosphere (DERMA) by developing and implementing a new hybrid particle-puff description of turbulent diffusion and by updating a few other parameterizations in the model. The new model is evaluated against data from three different tracer gas experiments, and the promising results are an important first step towards also using DERMA for short-range dispersion modeling.