Particulate matter (PM) episodes at a suburban site in Hong Kong: evolution of PM characteristics and role of photochemistry in secondary aerosol formation

Qin, Yi Ming; Li, Yong Jie; Wang, Hao; Lee, Berto Paul Yok Long; Huang, Dan Dan; Chan, Chak Keung

doi:10.5194/acp-16-14131-2016

Articles | Volume 16, issue 22

https://doi.org/10.5194/acp-16-14131-2016

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

https://doi.org/10.5194/acp-16-14131-2016

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

Articles | Volume 16, issue 22

Research article

|

15 Nov 2016

Research article |

| 15 Nov 2016

Particulate matter (PM) episodes at a suburban site in Hong Kong: evolution of PM characteristics and role of photochemistry in secondary aerosol formation

Yi Ming Qin, Yong Jie Li, Hao Wang, Berto Paul Yok Long Lee, Dan Dan Huang, and Chak Keung Chan

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Total article views: 5,268 (including HTML, PDF, and XML)

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2,288	2,859	121	5,268	456	119	172

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PDF: 2,859
XML: 121
Total: 5,268
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Views and downloads (calculated since 18 May 2016)

Month	HTML	PDF	XML	Total
May 2016	98	51	1	150
Jun 2016	17	11	1	29
Jul 2016	15	5	0	20
Aug 2016	18	7	1	26
Sep 2016	16	8	0	24
Oct 2016	11	7	7	25
Nov 2016	77	24	4	105
Dec 2016	34	23	0	57
Jan 2017	25	15	2	42
Feb 2017	16	7	1	24
Mar 2017	27	18	3	48
Apr 2017	40	39	2	81
May 2017	35	28	2	65
Jun 2017	27	12	1	40
Jul 2017	22	11	2	35
Aug 2017	15	14	1	30
Sep 2017	20	21	0	41
Oct 2017	14	21	0	35
Nov 2017	17	22	2	41
Dec 2017	4	16	2	22
Jan 2018	10	20	0	30
Feb 2018	11	15	0	26
Mar 2018	9	26	0	35
Apr 2018	15	34	0	49
May 2018	11	32	0	43
Jun 2018	9	25	0	34
Jul 2018	14	25	0	39
Aug 2018	10	23	0	33
Sep 2018	22	24	0	46
Oct 2018	24	34	2	60
Nov 2018	13	30	2	45
Dec 2018	7	13	2	22
Jan 2019	9	21	1	31
Feb 2019	10	10	0	20
Mar 2019	15	20	1	36
Apr 2019	9	21	1	31
May 2019	10	14	0	24
Jun 2019	7	21	0	28
Jul 2019	10	23	2	35
Aug 2019	7	17	0	24
Sep 2019	12	32	0	44
Oct 2019	12	18	2	32
Nov 2019	8	19	0	27
Dec 2019	7	13	0	20
Jan 2020	10	14	0	24
Feb 2020	5	8	1	14
Mar 2020	8	7	0	15
Apr 2020	5	13	0	18
May 2020	9	13	2	24
Jun 2020	23	19	1	43
Jul 2020	18	23	3	44
Aug 2020	16	10	3	29
Sep 2020	21	9	1	31
Oct 2020	9	9	1	19
Nov 2020	7	5	3	15
Dec 2020	17	13	0	30
Jan 2021	20	13	0	33
Feb 2021	17	8	0	25
Mar 2021	12	8	0	20
Apr 2021	16	20	0	36
May 2021	16	17	1	34
Jun 2021	9	14	1	24
Jul 2021	9	13	0	22
Aug 2021	7	17	0	24
Sep 2021	12	12	0	24
Oct 2021	12	39	0	51
Nov 2021	21	37	1	59
Dec 2021	25	14	1	40
Jan 2022	13	16	4	33
Feb 2022	8	14	1	23
Mar 2022	14	7	0	21
Apr 2022	10	8	1	19
May 2022	6	12	0	18
Jun 2022	14	4	0	18
Jul 2022	4	8	0	12
Aug 2022	16	9	0	25
Sep 2022	25	13	3	41
Oct 2022	12	4	2	18
Nov 2022	15	10	0	25
Dec 2022	14	4	0	18
Jan 2023	22	10	2	34
Feb 2023	14	4	0	18
Mar 2023	14	8	1	23
Apr 2023	15	10	0	25
May 2023	29	15	1	45
Jun 2023	48	50	2	100
Jul 2023	37	27	0	64
Aug 2023	40	43	2	85
Sep 2023	42	41	1	84
Oct 2023	44	82	1	127
Nov 2023	28	26	0	54
Dec 2023	45	78	0	123
Jan 2024	42	55	0	97
Feb 2024	43	39	0	82
Mar 2024	50	55	2	107
Apr 2024	42	29	4	75
May 2024	19	14	1	34
Jun 2024	49	40	2	91
Jul 2024	19	75	1	95
Aug 2024	30	61	2	93
Sep 2024	12	23	0	35
Oct 2024	19	33	0	52
Nov 2024	12	21	3	36
Dec 2024	8	24	0	32
Jan 2025	21	54	5	80
Feb 2025	20	40	4	64
Mar 2025	12	56	1	69
Apr 2025	15	77	0	92
May 2025	27	65	1	93
Jun 2025	41	42	5	88
Jul 2025	23	70	1	94
Aug 2025	26	75	1	102
Sep 2025	36	58	2	96
Oct 2025	21	59	0	80
Nov 2025	29	46	1	76

Cumulative views and downloads (calculated since 18 May 2016)

Month	HTML	PDF	XML	Total
May 2016	98	51	1	150
Jun 2016	17	11	1	29
Jul 2016	15	5	0	20
Aug 2016	18	7	1	26
Sep 2016	16	8	0	24
Oct 2016	11	7	7	25
Nov 2016	77	24	4	105
Dec 2016	34	23	0	57
Jan 2017	25	15	2	42
Feb 2017	16	7	1	24
Mar 2017	27	18	3	48
Apr 2017	40	39	2	81
May 2017	35	28	2	65
Jun 2017	27	12	1	40
Jul 2017	22	11	2	35
Aug 2017	15	14	1	30
Sep 2017	20	21	0	41
Oct 2017	14	21	0	35
Nov 2017	17	22	2	41
Dec 2017	4	16	2	22
Jan 2018	10	20	0	30
Feb 2018	11	15	0	26
Mar 2018	9	26	0	35
Apr 2018	15	34	0	49
May 2018	11	32	0	43
Jun 2018	9	25	0	34
Jul 2018	14	25	0	39
Aug 2018	10	23	0	33
Sep 2018	22	24	0	46
Oct 2018	24	34	2	60
Nov 2018	13	30	2	45
Dec 2018	7	13	2	22
Jan 2019	9	21	1	31
Feb 2019	10	10	0	20
Mar 2019	15	20	1	36
Apr 2019	9	21	1	31
May 2019	10	14	0	24
Jun 2019	7	21	0	28
Jul 2019	10	23	2	35
Aug 2019	7	17	0	24
Sep 2019	12	32	0	44
Oct 2019	12	18	2	32
Nov 2019	8	19	0	27
Dec 2019	7	13	0	20
Jan 2020	10	14	0	24
Feb 2020	5	8	1	14
Mar 2020	8	7	0	15
Apr 2020	5	13	0	18
May 2020	9	13	2	24
Jun 2020	23	19	1	43
Jul 2020	18	23	3	44
Aug 2020	16	10	3	29
Sep 2020	21	9	1	31
Oct 2020	9	9	1	19
Nov 2020	7	5	3	15
Dec 2020	17	13	0	30
Jan 2021	20	13	0	33
Feb 2021	17	8	0	25
Mar 2021	12	8	0	20
Apr 2021	16	20	0	36
May 2021	16	17	1	34
Jun 2021	9	14	1	24
Jul 2021	9	13	0	22
Aug 2021	7	17	0	24
Sep 2021	12	12	0	24
Oct 2021	12	39	0	51
Nov 2021	21	37	1	59
Dec 2021	25	14	1	40
Jan 2022	13	16	4	33
Feb 2022	8	14	1	23
Mar 2022	14	7	0	21
Apr 2022	10	8	1	19
May 2022	6	12	0	18
Jun 2022	14	4	0	18
Jul 2022	4	8	0	12
Aug 2022	16	9	0	25
Sep 2022	25	13	3	41
Oct 2022	12	4	2	18
Nov 2022	15	10	0	25
Dec 2022	14	4	0	18
Jan 2023	22	10	2	34
Feb 2023	14	4	0	18
Mar 2023	14	8	1	23
Apr 2023	15	10	0	25
May 2023	29	15	1	45
Jun 2023	48	50	2	100
Jul 2023	37	27	0	64
Aug 2023	40	43	2	85
Sep 2023	42	41	1	84
Oct 2023	44	82	1	127
Nov 2023	28	26	0	54
Dec 2023	45	78	0	123
Jan 2024	42	55	0	97
Feb 2024	43	39	0	82
Mar 2024	50	55	2	107
Apr 2024	42	29	4	75
May 2024	19	14	1	34
Jun 2024	49	40	2	91
Jul 2024	19	75	1	95
Aug 2024	30	61	2	93
Sep 2024	12	23	0	35
Oct 2024	19	33	0	52
Nov 2024	12	21	3	36
Dec 2024	8	24	0	32
Jan 2025	21	54	5	80
Feb 2025	20	40	4	64
Mar 2025	12	56	1	69
Apr 2025	15	77	0	92
May 2025	27	65	1	93
Jun 2025	41	42	5	88
Jul 2025	23	70	1	94
Aug 2025	26	75	1	102
Sep 2025	36	58	2	96
Oct 2025	21	59	0	80
Nov 2025	29	46	1	76

Latest update: 13 Nov 2025

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Short summary

The source, formation, transformation mechanisms and mixing state of particulate matter (PM) in high episodic events under different meteorological conditions in Hong Kong remain unclear. With high-resolution time-of-flight aerosol mass spectrometric measurement, we successfully demonstrated the dynamic and complex nature of PM transformation during high-PM episodes. This study revealed that not only regional transport but also local secondary formation is the culprit for high PM levels.