Surface ozone distribution and trends over Ireland:  insights from long-term measurement  record and source attribution modelling

Korhale, Nikhil; Ansari, Tabish; Butler, Tim; Ovadnevaite, Jurgita; Chevassus, Emmanuel; Ceburnis, Darius; Martin, Damien; O'Dowd, Colin D.; Coleman, Liz

doi:10.5194/acp-26-6557-2026

Articles | Volume 26, issue 10

https://doi.org/10.5194/acp-26-6557-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-26-6557-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 26, issue 10

Research article

|

18 May 2026

Research article |

| 18 May 2026

Surface ozone distribution and trends over Ireland: insights from long-term measurement record and source attribution modelling

Nikhil Korhale, Tabish Ansari, Tim Butler, Jurgita Ovadnevaite, Emmanuel Chevassus, Darius Ceburnis, Damien Martin, Colin D. O'Dowd, and Liz Coleman

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Month	HTML	PDF	XML	Total
Aug 2025	2,605	20	20	2,645
Sep 2025	9,617	86	20	9,723
Oct 2025	325	60	40	425
Nov 2025	249	85	45	379
Dec 2025	149	120	15	284
Jan 2026	242	195	40	477
Feb 2026	114	144	4	262
Mar 2026	231	201	11	443
Apr 2026	46	28	2	76
May 2026	365	86	18	469
Jun 2026	59	12	9	80
Jul 2026	54	19	32	105
Aug 2026	92	43	21	156
Sep 2026	299	151	105	555
Oct 2026	57	38	27	122

Cumulative views and downloads (calculated since 28 Aug 2025)

Month	HTML	PDF	XML	Total
Aug 2025	2,605	20	20	2,645
Sep 2025	9,617	86	20	9,723
Oct 2025	325	60	40	425
Nov 2025	249	85	45	379
Dec 2025	149	120	15	284
Jan 2026	242	195	40	477
Feb 2026	114	144	4	262
Mar 2026	231	201	11	443
Apr 2026	46	28	2	76
May 2026	365	86	18	469
Jun 2026	59	12	9	80
Jul 2026	54	19	32	105
Aug 2026	92	43	21	156
Sep 2026	299	151	105	555
Oct 2026	57	38	27	122

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Total article views: 16,201 (including HTML, PDF, and XML) Thereof 15,984 with geography defined and 217 with unknown origin.

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Short summary

We investigate the distribution and trends of surface ozone and its precursors over Ireland using advanced modelling to determine the drivers of ozone. Trajectory analysis is used to trace the origins of air masses, revealing the impact of transboundary pollution and atmospheric transport. The rising trend has been observed at urban sites over the past two decades, but without a similar trend at coastal sites. Coastal areas consistently show higher ozone levels than rural and urban areas.