Articles | Volume 21, issue 12
Research article
17 Jun 2021
Research article |  | 17 Jun 2021

Non-linear response of PM2.5 to changes in NOx and NH3 emissions in the Po basin (Italy): consequences for air quality plans

Philippe Thunis, Alain Clappier, Matthias Beekmann, Jean Philippe Putaud, Cornelis Cuvelier, Jessie Madrazo, and Alexander de Meij


Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on acp-2021-65', Anonymous Referee #1, 27 Mar 2021
    • AC1: 'Reply on RC1', Philippe Thunis, 23 Apr 2021
  • RC2: 'Comment on acp-2021-65', Anonymous Referee #2, 28 Mar 2021
    • AC2: 'Reply on RC2', Philippe Thunis, 23 Apr 2021

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision | EF: Editorial file upload
AR by Philippe Thunis on behalf of the Authors (23 Apr 2021)  Author's response   Author's tracked changes   Manuscript 
ED: Publish as is (05 May 2021) by Astrid Kiendler-Scharr (deceased)
AR by Philippe Thunis on behalf of the Authors (06 May 2021)  Author's response   Manuscript 
Short summary
Modelling simulations are used to identify the most efficient emission reduction strategies to reduce PM2.5 concentration levels in northern Italy. Results show contrasting chemical regimes and important non-linearities during wintertime, with the striking result that PM2.5 levels may increase when NOx reductions are applied in NOx-rich areas – a process that may have contributed to the absence of significant PM2.5 decrease during the COVID-19 lockdowns in many European cities.
Final-revised paper