Modeling of greenhouse gas transport and diffusion in urban areas

We are carrying out computational fluid dynamics (CFD) simulations of the greenhouse gas (GHG) emission from thermal power plants in urban environments. We validate these simulations by comparing the results with experimental measurements of column-averaged dry-air mole fractions of GHG (XGHG). We obtain GHG concentration maps for cities (e.g. Munich), leading to a better understanding of the GHG transport and diffusion in urban areas. These results also lead to the improvement of the design of experimental measurement campaigns.

F. Toja-Silva, J. Chen, S. Hachinger, and F. Hase: "CFD simulation of CO2 emission from urban thermal power plant: analysis of turbulent Schmidt number and comparison with Gaussian plume model and measurements", Journal of Wind Engineering & Industrial Aerodynamics (169), 177–193, doi.org/10.1016/j.jweia.2017.07.015, 2017

F. Toja-Silva, C. Pregel-Hoderlein, and J. Chen: "On the urban geometry generalization for CFD simulation of gas dispersion from chimneys: Comparison with Gaussian plume model", Journal of Wind Engineering and Industrial Aerodynamics (177), 1-18, doi.org/10.1016/j.jweia.2018.04.003, 2018

WRF mesoscale modeling

We use mesoscale models (e.g., WRF-GHG, WRF-STILT, HYSPLIT-STILT) to simulate the column concentration of greenhouse gases, in collaboration with our Max Planck Institute and Harvard colleagues.

Zhao, X., Marshall, J., Hachinger, S., Gerbig, C., and Chen, J.: Analysis of Total Column CO2 and CH4 Measurements in Berlin with WRF-GHG, Atmospheric Chemistry and Physics, 19, 11279–11302, https://doi.org/10.5194/acp-19-11279-2019, 2019