Formaldehyde and hydroperoxide distribution around the Arabian Peninsula – evaluation of EMAC model results with ship-based measurements

Dienhart, Dirk; Brendel, Bettina; Crowley, John N.; Eger, Philipp G.; Harder, Hartwig; Martinez, Monica; Pozzer, Andrea; Rohloff, Roland; Schuladen, Jan; Tauer, Sebastian; Walter, David; Lelieveld, Jos; Fischer, Horst

doi:https://doi.org/10.5194/acp-23-119-2023

Articles | Volume 23, issue 1

https://doi.org/10.5194/acp-23-119-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

The Modular Earth Submodel System (MESSy) (ACP/GMD inter-journal...

https://doi.org/10.5194/acp-23-119-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 23, issue 1

Research article

|

04 Jan 2023

Research article |

| 04 Jan 2023

Formaldehyde and hydroperoxide distribution around the Arabian Peninsula – evaluation of EMAC model results with ship-based measurements

Dirk Dienhart, Bettina Brendel, John N. Crowley, Philipp G. Eger, Hartwig Harder, Monica Martinez, Andrea Pozzer, Roland Rohloff, Jan Schuladen, Sebastian Tauer, David Walter, Jos Lelieveld, and Horst Fischer

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Nov 2022	38	46	4	88
Dec 2022	23	40	0	63
Jan 2023	334	54	2	390
Feb 2023	133	45	0	178
Mar 2023	124	29	1	154
Apr 2023	95	25	0	120
May 2023	102	20	2	124
Jun 2023	83	27	6	116
Jul 2023	68	32	0	100
Aug 2023	68	31	4	103
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Mar 2024	23	37	2	62
Apr 2024	32	14	2	48
May 2024	11	8	5	24

Cumulative views and downloads (calculated since 24 Aug 2022)

Month	HTML	PDF	XML	Total
Aug 2022	141	33	2	176
Sep 2022	49	58	2	109
Oct 2022	46	61	4	111
Nov 2022	38	46	4	88
Dec 2022	23	40	0	63
Jan 2023	334	54	2	390
Feb 2023	133	45	0	178
Mar 2023	124	29	1	154
Apr 2023	95	25	0	120
May 2023	102	20	2	124
Jun 2023	83	27	6	116
Jul 2023	68	32	0	100
Aug 2023	68	31	4	103
Sep 2023	74	28	2	104
Oct 2023	87	12	2	101
Nov 2023	45	13	0	58
Dec 2023	37	24	2	63
Jan 2024	41	10	1	52
Feb 2024	20	23	0	43
Mar 2024	23	37	2	62
Apr 2024	32	14	2	48
May 2024	11	8	5	24

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Formaldehyde and hydroperoxide measurements were performed in the marine boundary layer around the Arabian Peninsula and highlight the Suez Canal and Arabian (Persian) Gulf as a hotspot of photochemical air pollution. A comparison with the EMAC model shows that the formaldehyde results match within a factor of 2, while hydrogen peroxide was overestimated by more than a factor of 5, which revealed enhanced HO_x (OH+HO₂) radicals in the simulation and an underestimation of dry deposition velocites.

Formaldehyde and hydroperoxide distribution around the Arabian Peninsula – evaluation of EMAC model results with ship-based measurements

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