Effect of radiation interaction and aerosol processes on ventilation and aerosol concentrations in a real urban neighbourhood in Helsinki

Strömberg, Jani; Li, Xiaoyu; Kurppa, Mona; Kuuluvainen, Heino; Pirjola, Liisa; Järvi, Leena

doi:https://doi.org/10.5194/acp-23-9347-2023

Articles | Volume 23, issue 16

https://doi.org/10.5194/acp-23-9347-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-23-9347-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 23, issue 16

Research article

|

24 Aug 2023

Research article |

| 24 Aug 2023

Effect of radiation interaction and aerosol processes on ventilation and aerosol concentrations in a real urban neighbourhood in Helsinki

Jani Strömberg, Xiaoyu Li, Mona Kurppa, Heino Kuuluvainen, Liisa Pirjola, and Leena Järvi

Data sets

Input files and scripts for creating PALM simulation input files on Mäkelänkatu in Helsinki, Finland Mona Kurppa and Jani Strömberg https://doi.org/10.5281/zenodo.3839684

Mäkelänkatu Scripts 2022 Finalized Jani Strömberg and Mona Kurppa https://doi.org/10.5281/zenodo.8112867

Mäkelänkatu Simulations 2022 Mona Kurppa and Jani Strömberg https://doi.org/10.5281/zenodo.7115705

Model code and software

Source code of the PALM model system (revision 4734) Jani Strömberg https://doi.org/10.5281/zenodo.8113087

Short summary

We conclude that with low wind speeds, solar radiation has a larger decreasing effect (53 %) on pollutant concentrations than aerosol processes (18 %). Additionally, our results showed that with solar radiation included, pollutant concentrations were closer to observations (−13 %) than with only aerosol processes (+98 %). This has implications when planning simulations under calm conditions such as in our case and when deciding whether or not simulations need to include these processes.