15 Sep 2023
 | 15 Sep 2023
Status: this preprint is open for discussion and under review for Atmospheric Chemistry and Physics (ACP).

Analysis of an intense O3 pollution episode in the Atlantic Coast of the Iberian Peninsula using photochemical modelling: characterization of transport pathways and accumulation processes

Eduardo Torre-Pascual, Gotzon Gangoiti, Ana Rodríguez-García, Estíbaliz Sáez de Cámara, Joana Ferreira, Carla Gama, María Carmen Gómez, Iñaki Zuazo, Jose Antonio García, and Maite de Blas

Abstract. A tropospheric O3 pollution episode over the Atlantic Coast of the Iberian Peninsula during August 2–6 in 2018 has been analyzed. The episode was characterized by a permanent wind shear throughout the entire period, making the observed ozone surface distribution especially difficult to explain. A new methodology is described analyzing upper-level atmospheric parameters, such as temperature, wind direction, wind speed, and O3 concentrations, added to the traditional use of surface parameters, using WRF-CAMx models and available surface and upper-air observations. Results indicate that the episode was characterized by a first phase of a sudden increase in O3 concentrations produced by fumigation and interregional transport processes within the Iberian Peninsula, followed by a continental O3 transport from Europe to the Atlantic Coast. An Atlantic front produced the dissipation of the episode, generating an “ozone front” heading the cold front passage across the region.

Eduardo Torre-Pascual et al.

Status: open (until 27 Oct 2023)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2023-387', Anonymous Referee #2, 02 Oct 2023 reply

Eduardo Torre-Pascual et al.

Eduardo Torre-Pascual et al.


Total article views: 185 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
132 44 9 185 17 6 5
  • HTML: 132
  • PDF: 44
  • XML: 9
  • Total: 185
  • Supplement: 17
  • BibTeX: 6
  • EndNote: 5
Views and downloads (calculated since 15 Sep 2023)
Cumulative views and downloads (calculated since 15 Sep 2023)

Viewed (geographical distribution)

Total article views: 180 (including HTML, PDF, and XML) Thereof 180 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
Latest update: 03 Oct 2023
Short summary
We present an analysis of an intense air pollution episode of tropospheric ozone over the Atlantic coast of the Iberian Peninsula, with measured and simulated parameters. Our analysis based not only on surface parameters but also on altitude parameters shows that the described episode may occur due to the accumulation of O3 in the upper layers of the atmosphere during previous days. That air mass will be transported to surface layers producing a sharp increase in O3 concentrations.