Error induced by neglecting subgrid chemical segregation due  to inefficient turbulent mixing in regional chemical-transport  models in urban environments

Li, Cathy W. Y.; Brasseur, Guy P.; Schmidt, Hauke; Mellado, Juan Pedro

doi:https://doi.org/10.5194/acp-21-483-2021

Articles | Volume 21, issue 1

https://doi.org/10.5194/acp-21-483-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-21-483-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 21, issue 1

Research article

|

14 Jan 2021

Research article |

| 14 Jan 2021

Error induced by neglecting subgrid chemical segregation due to inefficient turbulent mixing in regional chemical-transport models in urban environments

Cathy W. Y. Li, Guy P. Brasseur, Hauke Schmidt, and Juan Pedro Mellado

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Final revised paper (published on 14 Jan 2021)
Preprint (discussion started on 24 Jul 2020)

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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- Supplement

RC1: 'Evaluation', Jordi Vila-Guerau de Arellano, 03 Aug 2020
- AC1: 'Reply to the evaluation from Jordi Vila-Guerau de Arellano', Cathy Wing Yi Li, 25 Nov 2020
RC2: 'Review of Error induced by neglecting subgrid chemical segregation due to inefficient turbulent mixing in regional chemical-transport models in urban environments', Anonymous Referee #3, 20 Nov 2020
- AC2: 'Reply to the review from Anonymous Referee #3', Cathy Wing Yi Li, 25 Nov 2020

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

AR by Cathy Wing Yi Li on behalf of the Authors (03 Dec 2020) Author's response Manuscript

ED: Publish as is (04 Dec 2020) by Stefano Galmarini

AR by Cathy Wing Yi Li on behalf of the Authors (06 Dec 2020)

Short summary

Intense and localised emissions of pollutants are common in urban environments, in which turbulence cannot mix these segregated pollutants efficiently in the atmosphere. Despite their relatively high resolution, regional models cannot resolve such segregation and assume instantaneous mixing of these pollutants in their model grids, which potentially induces significant error in the subsequent chemical calculation, based on our calculation with a model that explicitly resolves turbulent motions.