Chemical and physical characterization of traffic particles in four  different highway environments in the Helsinki metropolitan area

Enroth, Joonas; Saarikoski, Sanna; Niemi, Jarkko; Kousa, Anu; Ježek, Irena; Močnik, Griša; Carbone, Samara; Kuuluvainen, Heino; Rönkkö, Topi; Hillamo, Risto; Pirjola, Liisa

doi:10.5194/acp-16-5497-2016

Articles | Volume 16, issue 9

https://doi.org/10.5194/acp-16-5497-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/acp-16-5497-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 16, issue 9

Research article

|

03 May 2016

Research article |

| 03 May 2016

Chemical and physical characterization of traffic particles in four different highway environments in the Helsinki metropolitan area

Joonas Enroth, Sanna Saarikoski, Jarkko Niemi, Anu Kousa, Irena Ježek, Griša Močnik, Samara Carbone, Heino Kuuluvainen, Topi Rönkkö, Risto Hillamo, and Liisa Pirjola

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Month	HTML	PDF	XML	Total
Jan 2016	61	35	0	96
Feb 2016	43	26	1	70
Mar 2016	14	11	0	25
Apr 2016	30	15	1	46
May 2016	209	96	4	309
Jun 2016	34	19	1	54
Jul 2016	17	12	3	32
Aug 2016	11	6	0	17
Sep 2016	13	5	0	18
Oct 2016	20	12	0	32
Nov 2016	12	7	0	19
Dec 2016	3	5	0	8
Jan 2017	11	5	0	16
Feb 2017	17	9	0	26
Mar 2017	21	16	2	39
Apr 2017	23	15	0	38
May 2017	26	23	0	49
Jun 2017	22	12	1	35
Jul 2017	20	10	1	31
Aug 2017	13	10	0	23
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Oct 2017	14	11	1	26
Nov 2017	13	16	8	37
Dec 2017	13	10	0	23
Jan 2018	15	14	2	31
Feb 2018	6	10	0	16
Mar 2018	12	11	0	23
Apr 2018	15	7	0	22
May 2018	22	15	0	37
Jun 2018	8	9	0	17
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Aug 2018	16	10	0	26
Sep 2018	20	11	1	32
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Nov 2018	28	14	1	43
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Jan 2019	16	7	1	24
Feb 2019	9	6	2	17
Mar 2019	11	12	1	24
Apr 2019	13	10	1	24
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Jul 2019	17	5	3	25
Aug 2019	7	6	1	14
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Oct 2019	19	8	1	28
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Jan 2020	14	6	2	22
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Aug 2020	9	8	3	20
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Jul 2021	9	16	0	25
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Jun 2023	38	3	1	42
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Oct 2023	44	6	1	51
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Dec 2023	50	16	3	69
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Feb 2024	35	12	0	47
Mar 2024	39	13	3	55
Apr 2024	38	8	2	48
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Jun 2024	38	9	1	48
Jul 2024	11	2	1	14
Aug 2024	27	5	2	34
Sep 2024	7	3	0	10
Oct 2024	22	6	1	29
Nov 2024	23	5	2	30
Dec 2024	30	6	7	43
Jan 2025	24	6	4	34
Feb 2025	22	10	1	33
Mar 2025	13	12	3	28
Apr 2025	10	14	0	24
May 2025	21	4	0	25
Jun 2025	38	13	2	53
Jul 2025	26	14	2	42
Aug 2025	33	12	0	45
Sep 2025	45	10	5	60
Oct 2025	22	25	0	47
Nov 2025	14	12	3	29

Cumulative views and downloads (calculated since 18 Jan 2016)

Month	HTML	PDF	XML	Total
Jan 2016	61	35	0	96
Feb 2016	43	26	1	70
Mar 2016	14	11	0	25
Apr 2016	30	15	1	46
May 2016	209	96	4	309
Jun 2016	34	19	1	54
Jul 2016	17	12	3	32
Aug 2016	11	6	0	17
Sep 2016	13	5	0	18
Oct 2016	20	12	0	32
Nov 2016	12	7	0	19
Dec 2016	3	5	0	8
Jan 2017	11	5	0	16
Feb 2017	17	9	0	26
Mar 2017	21	16	2	39
Apr 2017	23	15	0	38
May 2017	26	23	0	49
Jun 2017	22	12	1	35
Jul 2017	20	10	1	31
Aug 2017	13	10	0	23
Sep 2017	14	21	1	36
Oct 2017	14	11	1	26
Nov 2017	13	16	8	37
Dec 2017	13	10	0	23
Jan 2018	15	14	2	31
Feb 2018	6	10	0	16
Mar 2018	12	11	0	23
Apr 2018	15	7	0	22
May 2018	22	15	0	37
Jun 2018	8	9	0	17
Jul 2018	16	10	1	27
Aug 2018	16	10	0	26
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Oct 2018	25	10	5	40
Nov 2018	28	14	1	43
Dec 2018	14	4	1	19
Jan 2019	16	7	1	24
Feb 2019	9	6	2	17
Mar 2019	11	12	1	24
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May 2019	15	10	1	26
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Aug 2019	7	6	1	14
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Dec 2022	10	4	0	14
Jan 2023	13	16	0	29
Feb 2023	18	10	1	29
Mar 2023	14	10	0	24
Apr 2023	5	6	0	11
May 2023	40	13	0	53
Jun 2023	38	3	1	42
Jul 2023	36	6	1	43
Aug 2023	37	10	3	50
Sep 2023	40	13	0	53
Oct 2023	44	6	1	51
Nov 2023	21	1	22
Dec 2023	50	16	3	69
Jan 2024	41	8	1	50
Feb 2024	35	12	0	47
Mar 2024	39	13	3	55
Apr 2024	38	8	2	48
May 2024	13	5	2	20
Jun 2024	38	9	1	48
Jul 2024	11	2	1	14
Aug 2024	27	5	2	34
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Oct 2024	22	6	1	29
Nov 2024	23	5	2	30
Dec 2024	30	6	7	43
Jan 2025	24	6	4	34
Feb 2025	22	10	1	33
Mar 2025	13	12	3	28
Apr 2025	10	14	0	24
May 2025	21	4	0	25
Jun 2025	38	13	2	53
Jul 2025	26	14	2	42
Aug 2025	33	12	0	45
Sep 2025	45	10	5	60
Oct 2025	22	25	0	47
Nov 2025	14	12	3	29

Latest update: 18 Nov 2025

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This paper presents a comprehensive summary of roadside measurements using a mobile laboratory, equipped with state-of-the-art instrumentation. Pollution gradients were observed for particle number, black carbon, organics, some metals, and gases at four different highway environments. Flow dynamics appeared to be an important factor, however, at the most open site, condensation of semi-volatile organics was observed. The fleet average NO₂ emission factor increased over the last decade.