Influence of anthropogenic emissions on the composition of highly oxygenated organic molecules in Helsinki: a street canyon and urban background station comparison

Okuljar, Magdalena; Garmash, Olga; Olin, Miska; Kalliokoski, Joni; Timonen, Hilkka; Niemi, Jarkko V.; Paasonen, Pauli; Kontkanen, Jenni; Zhang, Yanjun; Hellén, Heidi; Kuuluvainen, Heino; Aurela, Minna; Manninen, Hanna E.; Sipilä, Mikko; Rönkkö, Topi; Petäjä, Tuukka; Kulmala, Markku; Dal Maso, Miikka; Ehn, Mikael

doi:https://doi.org/10.5194/acp-23-12965-2023

Articles | Volume 23, issue 20

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Articles | Volume 23, issue 20

https://doi.org/10.5194/acp-23-12965-2023

Articles | Volume 23, issue 20

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Peer review
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Research article

16 Oct 2023

Research article |

| 16 Oct 2023

Influence of anthropogenic emissions on the composition of highly oxygenated organic molecules in Helsinki: a street canyon and urban background station comparison

Magdalena Okuljar, Olga Garmash, Miska Olin, Joni Kalliokoski, Hilkka Timonen, Jarkko V. Niemi, Pauli Paasonen, Jenni Kontkanen, Yanjun Zhang, Heidi Hellén, Heino Kuuluvainen, Minna Aurela, Hanna E. Manninen, Mikko Sipilä, Topi Rönkkö, Tuukka Petäjä, Markku Kulmala, Miikka Dal Maso, and Mikael Ehn

Magdalena Okuljar

CORRESPONDING AUTHOR

magdalena.okuljar@helsinki.fi

https://orcid.org/0000-0003-1812-4442

Institute of Atmospheric and Earth System Science/Physics, University of Helsinki, 00014, Helsinki, Finland

Olga Garmash

https://orcid.org/0000-0002-9675-3271

Aerosol Physics Laboratory, Physics Unit, Tampere University, P.O. Box 692, 33014, Tampere, Finland

Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States

Miska Olin

https://orcid.org/0000-0001-8034-3473

Aerosol Physics Laboratory, Physics Unit, Tampere University, P.O. Box 692, 33014, Tampere, Finland

Joni Kalliokoski

Aerosol Physics Laboratory, Physics Unit, Tampere University, P.O. Box 692, 33014, Tampere, Finland

Hilkka Timonen

https://orcid.org/0000-0002-7987-7985

Atmospheric Composition Research, Finnish Meteorological Institute, 00101, Helsinki, Finland

Jarkko V. Niemi

Helsinki Region Environmental Services Authority, HSY, P.O. Box 100, 00066, Helsinki, Finland

Pauli Paasonen

https://orcid.org/0000-0002-4625-9590

Institute of Atmospheric and Earth System Science/Physics, University of Helsinki, 00014, Helsinki, Finland

Jenni Kontkanen

https://orcid.org/0000-0002-5373-3537

Institute of Atmospheric and Earth System Science/Physics, University of Helsinki, 00014, Helsinki, Finland

CSC – IT Center for Science Ltd., 02101, Espoo, Finland

Yanjun Zhang

Institute of Atmospheric and Earth System Science/Physics, University of Helsinki, 00014, Helsinki, Finland

IRCELYON, University of Lyon, Université Claude Bernard Lyon 1, CNRS,69626 Villeurbanne, France

Heidi Hellén

https://orcid.org/0000-0001-7022-3857

Atmospheric Composition Research, Finnish Meteorological Institute, 00101, Helsinki, Finland

Heino Kuuluvainen

Aerosol Physics Laboratory, Physics Unit, Tampere University, P.O. Box 692, 33014, Tampere, Finland

Minna Aurela

https://orcid.org/0000-0001-7561-2974

Atmospheric Composition Research, Finnish Meteorological Institute, 00101, Helsinki, Finland

Hanna E. Manninen

Helsinki Region Environmental Services Authority, HSY, P.O. Box 100, 00066, Helsinki, Finland

Mikko Sipilä

Institute of Atmospheric and Earth System Science/Physics, University of Helsinki, 00014, Helsinki, Finland

Topi Rönkkö

https://orcid.org/0000-0002-1555-3367

Aerosol Physics Laboratory, Physics Unit, Tampere University, P.O. Box 692, 33014, Tampere, Finland

Tuukka Petäjä

https://orcid.org/0000-0002-1881-9044

Institute of Atmospheric and Earth System Science/Physics, University of Helsinki, 00014, Helsinki, Finland

Markku Kulmala

https://orcid.org/0000-0003-3464-7825

Institute of Atmospheric and Earth System Science/Physics, University of Helsinki, 00014, Helsinki, Finland

Miikka Dal Maso

https://orcid.org/0000-0003-3040-3612

Aerosol Physics Laboratory, Physics Unit, Tampere University, P.O. Box 692, 33014, Tampere, Finland

Mikael Ehn

https://orcid.org/0000-0002-0215-4893

Institute of Atmospheric and Earth System Science/Physics, University of Helsinki, 00014, Helsinki, Finland

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Total article views: 2,105 (including HTML, PDF, and XML)

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1,628	432	45	2,105	111	30	47

HTML: 1,628
PDF: 432
XML: 45
Total: 2,105
Supplement: 111
BibTeX: 30
EndNote: 47

Views and downloads (calculated since 08 May 2023)

Cumulative views and downloads (calculated since 08 May 2023)

Total article views: 1,552 (including HTML, PDF, and XML)

HTML	PDF	XML	Total	Supplement	BibTeX	EndNote
1,249	275	28	1,552	72	24	39

HTML: 1,249
PDF: 275
XML: 28
Total: 1,552
Supplement: 72
BibTeX: 24
EndNote: 39

Views and downloads (calculated since 16 Oct 2023)

Month	HTML	PDF	XML	Total
Oct 2023	411	101	5	517
Nov 2023	144	26	4	174
Dec 2023	33	12	0	45
Jan 2024	23	10	0	33
Feb 2024	36	15	3	54
Mar 2024	31	19	1	51
Apr 2024	30	13	4	47
May 2024	44	10	2	56
Jun 2024	67	9	1	77
Jul 2024	63	9	3	75
Aug 2024	25	6	3	34
Sep 2024	23	7	0	30
Oct 2024	30	4	0	34
Nov 2024	21	6	1	28
Dec 2024	94	5	1	100
Jan 2025	124	6	0	130
Feb 2025	32	9	0	41
Mar 2025	17	6	0	23
Apr 2025	1	2	0	3

Cumulative views and downloads (calculated since 16 Oct 2023)

Month	HTML	PDF	XML	Total
Oct 2023	411	101	5	517
Nov 2023	144	26	4	174
Dec 2023	33	12	0	45
Jan 2024	23	10	0	33
Feb 2024	36	15	3	54
Mar 2024	31	19	1	51
Apr 2024	30	13	4	47
May 2024	44	10	2	56
Jun 2024	67	9	1	77
Jul 2024	63	9	3	75
Aug 2024	25	6	3	34
Sep 2024	23	7	0	30
Oct 2024	30	4	0	34
Nov 2024	21	6	1	28
Dec 2024	94	5	1	100
Jan 2025	124	6	0	130
Feb 2025	32	9	0	41
Mar 2025	17	6	0	23
Apr 2025	1	2	0	3

Total article views: 553 (including HTML, PDF, and XML)

HTML	PDF	XML	Total	Supplement	BibTeX	EndNote
379	157	17	553	39	6	8

HTML: 379
PDF: 157
XML: 17
Total: 553
Supplement: 39
BibTeX: 6
EndNote: 8

Views and downloads (calculated since 08 May 2023)

Month	HTML	PDF	XML	Total
Oct 2023	411	101	5	517
Nov 2023	144	26	4	174
Dec 2023	33	12	0	45
Jan 2024	23	10	0	33
Feb 2024	36	15	3	54
Mar 2024	31	19	1	51
Apr 2024	30	13	4	47
May 2024	44	10	2	56
Jun 2024	67	9	1	77
Jul 2024	63	9	3	75
Aug 2024	25	6	3	34
Sep 2024	23	7	0	30
Oct 2024	30	4	0	34
Nov 2024	21	6	1	28
Dec 2024	94	5	1	100
Jan 2025	124	6	0	130
Feb 2025	32	9	0	41
Mar 2025	17	6	0	23
Apr 2025	1	2	0	3

Cumulative views and downloads (calculated since 08 May 2023)

Month	HTML	PDF	XML	Total
Oct 2023	411	101	5	517
Nov 2023	144	26	4	174
Dec 2023	33	12	0	45
Jan 2024	23	10	0	33
Feb 2024	36	15	3	54
Mar 2024	31	19	1	51
Apr 2024	30	13	4	47
May 2024	44	10	2	56
Jun 2024	67	9	1	77
Jul 2024	63	9	3	75
Aug 2024	25	6	3	34
Sep 2024	23	7	0	30
Oct 2024	30	4	0	34
Nov 2024	21	6	1	28
Dec 2024	94	5	1	100
Jan 2025	124	6	0	130
Feb 2025	32	9	0	41
Mar 2025	17	6	0	23
Apr 2025	1	2	0	3

Viewed (geographical distribution)

Show all Final revised paper only Preprint only

Total article views: 2,105 (including HTML, PDF, and XML) Thereof 2,065 with geography defined and 40 with unknown origin.

Total article views: 1,552 (including HTML, PDF, and XML) Thereof 1,500 with geography defined and 52 with unknown origin.

Total article views: 553 (including HTML, PDF, and XML) Thereof 553 with geography defined and 0 with unknown origin.

Country	#	Views	%
United States of America	1	590	28
China	2	367	17
Finland	3	205	9
India	4	111	5
Germany	5	108	5

Country	#	Views	%
United States of America	1	420	27
China	2	318	20
Finland	3	127	8
India	4	99	6
Germany	5	63	4

Country	#	Views	%
United States of America	1	170	30
Finland	2	78	14
China	3	49	8
Germany	4	45	8
United Kingdom	5	33	5


Total:	0
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590


Total:	0
HTML:	0
PDF:	0
XML:	0

420


Total:	0
HTML:	0
PDF:	0
XML:	0

170

Cited

Show all Final revised paper only Preprint only

5 citations as recorded by crossref.

The Characteristics of the Chemical Composition of PM2.5 during a Severe Haze Episode in Suzhou, China X. Huang et al. 10.3390/atmos15101204
Long-term evolution of carbonaceous aerosols in PM2.5 during over a decade of atmospheric pollution outbreaks and control in polluted central China Z. Dong et al. 10.1016/j.scitotenv.2024.173089
Comparison of Gaseous and Particulate Highly Oxygenated Organic Molecules from the Ozonolysis of Terpenes J. Zhao et al. 10.1021/acsestair.4c00121
Characterization of brown carbon absorption in different European environments through source contribution analysis H. Navarro-Barboza et al. 10.5194/acp-25-2667-2025
Influence of anthropogenic emissions on the composition of highly oxygenated organic molecules in Helsinki: a street canyon and urban background station comparison M. Okuljar et al. 10.5194/acp-23-12965-2023

4 citations as recorded by crossref.

The Characteristics of the Chemical Composition of PM2.5 during a Severe Haze Episode in Suzhou, China X. Huang et al. 10.3390/atmos15101204
Long-term evolution of carbonaceous aerosols in PM2.5 during over a decade of atmospheric pollution outbreaks and control in polluted central China Z. Dong et al. 10.1016/j.scitotenv.2024.173089
Comparison of Gaseous and Particulate Highly Oxygenated Organic Molecules from the Ozonolysis of Terpenes J. Zhao et al. 10.1021/acsestair.4c00121
Characterization of brown carbon absorption in different European environments through source contribution analysis H. Navarro-Barboza et al. 10.5194/acp-25-2667-2025

1 citations as recorded by crossref.

Influence of anthropogenic emissions on the composition of highly oxygenated organic molecules in Helsinki: a street canyon and urban background station comparison M. Okuljar et al. 10.5194/acp-23-12965-2023

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Short summary

Highly oxygenated organic molecules (HOMs) form secondary organic aerosol that affects air quality and health. In this study, we demonstrate that in a moderately polluted city with abundant vegetation, the composition of HOMs is largely controlled by the effect of NO_x on the biogenic volatile organic compound oxidation. Comparing the results from two nearby stations, we show that HOM composition and formation pathways can change considerably within small distances in urban environments.

Highly oxygenated organic molecules (HOMs) form secondary organic aerosol that affects air...

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