The effect of BC on aerosol–boundary layer feedback: potential implications for urban pollution episodes

Slater, Jessica; Coe, Hugh; McFiggans, Gordon; Tonttila, Juha; Romakkaniemi, Sami

doi:https://doi.org/10.5194/acp-22-2937-2022

Articles | Volume 22, issue 4

https://doi.org/10.5194/acp-22-2937-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-22-2937-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 22, issue 4

Research article

|

03 Mar 2022

Research article |

| 03 Mar 2022

The effect of BC on aerosol–boundary layer feedback: potential implications for urban pollution episodes

Jessica Slater, Hugh Coe, Gordon McFiggans, Juha Tonttila, and Sami Romakkaniemi

Model code and software

UCLALES-SALSA https://github.com/UCLALES-SALSA https://github.com/UCLALES-SALSA/UCLALES-SALSA

Short summary

This paper shows the specific impact of black carbon (BC) on the aerosol–planetary boundary layer (PBL) feedback and its influence on a Beijing haze episode. Overall, this paper shows that strong temperature inversions prevent BC heating within the PBL from significantly increasing PBL height, while BC above the PBL suppresses PBL development significantly through the day. From this we suggest a method by which both locally and regionally emitted BC may impact urban pollution episodes.