Observations of particles at their formation sizes in Beijing, China

Jayaratne, Rohan; Pushpawela, Buddhi; He, Congrong; Li, Hui; Gao, Jian; Chai, Fahe; Morawska, Lidia

doi:10.5194/acp-17-8825-2017

Articles | Volume 17, issue 14

https://doi.org/10.5194/acp-17-8825-2017

© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/acp-17-8825-2017

© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 17, issue 14

Research article

|

20 Jul 2017

Research article |

| 20 Jul 2017

Observations of particles at their formation sizes in Beijing, China

Rohan Jayaratne, Buddhi Pushpawela, Congrong He, Hui Li, Jian Gao, Fahe Chai, and Lidia Morawska

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Total article views: 3,276 (including HTML, PDF, and XML)

HTML	PDF	XML	Total	BibTeX	EndNote
1,978	1,156	142	3,276	128	210

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XML: 142
Total: 3,276
BibTeX: 128
EndNote: 210

Views and downloads (calculated since 01 Mar 2017)

Month	HTML	PDF	XML	Total
Mar 2017	129	65	22	216
Apr 2017	47	43	11	101
May 2017	33	7	11	51
Jun 2017	32	8	9	49
Jul 2017	203	93	2	298
Aug 2017	63	39	2	104
Sep 2017	31	22	0	53
Oct 2017	15	14	0	29
Nov 2017	10	17	0	27
Dec 2017	19	12	0	31
Jan 2018	14	15	2	31
Feb 2018	11	12	0	23
Mar 2018	15	14	0	29
Apr 2018	7	13	0	20
May 2018	17	12	0	29
Jun 2018	10	7	1	18
Jul 2018	8	10	0	18
Aug 2018	16	12	0	28
Sep 2018	9	8	0	17
Oct 2018	11	6	1	18
Nov 2018	14	11	4	29
Dec 2018	11	5	1	17
Jan 2019	5	9	1	15
Feb 2019	5	6	0	11
Mar 2019	13	5	0	18
Apr 2019	5	3	0	8
May 2019	8	5	0	13
Jun 2019	4	5	0	9
Jul 2019	5	6	0	11
Aug 2019	3	5	0	8
Sep 2019	1	5	0	6
Oct 2019	6	7	1	14
Nov 2019	4	5	0	9
Dec 2019	4	5	0	9
Jan 2020	6	7	0	13
Feb 2020	7	3	0	10
Mar 2020	2	6	0	8
Apr 2020	5	5	0	10
May 2020	4	2	0	6
Jun 2020	13	10	0	23
Jul 2020	13	16	4	33
Aug 2020	9	5	1	15
Sep 2020	11	3	0	14
Oct 2020	7	3	0	10
Nov 2020	6	8	0	14
Dec 2020	8	3	0	11
Jan 2021	10	7	0	17
Feb 2021	7	8	0	15
Mar 2021	10	7	0	17
Apr 2021	9	9	0	18
May 2021	6	4	2	12
Jun 2021	7	8	0	15
Jul 2021	10	5	0	15
Aug 2021	10	10	0	20
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Oct 2021	15	51	3	69
Nov 2021	7	29	0	36
Dec 2021	12	20	0	32
Jan 2022	10	11	1	22
Feb 2022	4	8	1	13
Mar 2022	21	14	1	36
Apr 2022	7	8	2	17
May 2022	7	6	0	13
Jun 2022	6	4	0	10
Jul 2022	5	2	0	7
Aug 2022	14	4	0	18
Sep 2022	6	2	0	8
Oct 2022	7	7	1	15
Nov 2022	20	9	0	29
Dec 2022	16	5	2	23
Jan 2023	7	9	0	16
Feb 2023	17	10	4	31
Mar 2023	20	9	1	30
Apr 2023	9	4	2	15
May 2023	29	9	0	38
Jun 2023	39	5	2	46
Jul 2023	36	5	1	42
Aug 2023	38	6	2	46
Sep 2023	37	3	0	40
Oct 2023	39	14	2	55
Nov 2023	25	3	1	29
Dec 2023	48	12	3	63
Jan 2024	35	12	0	47
Feb 2024	33	4	0	37
Mar 2024	46	16	1	63
Apr 2024	38	14	4	56
May 2024	20	14	0	34
Jun 2024	11	4	1	16
Jul 2024	10	8	3	21
Aug 2024	23	6	3	32
Sep 2024	16	3	0	19
Oct 2024	10	8	0	18
Nov 2024	10	4	2	16
Dec 2024	9	6	2	17
Jan 2025	24	7	2	33
Feb 2025	28	3	2	33
Mar 2025	20	14	2	36
Apr 2025	16	18	0	34
May 2025	18	10	3	31
Jun 2025	39	7	3	49
Jul 2025	22	14	0	36
Aug 2025	16	11	0	27
Sep 2025	27	16	3	46
Oct 2025	23	25	1	49
Nov 2025	24	15	5	44

Cumulative views and downloads (calculated since 01 Mar 2017)

Month	HTML	PDF	XML	Total
Mar 2017	129	65	22	216
Apr 2017	47	43	11	101
May 2017	33	7	11	51
Jun 2017	32	8	9	49
Jul 2017	203	93	2	298
Aug 2017	63	39	2	104
Sep 2017	31	22	0	53
Oct 2017	15	14	0	29
Nov 2017	10	17	0	27
Dec 2017	19	12	0	31
Jan 2018	14	15	2	31
Feb 2018	11	12	0	23
Mar 2018	15	14	0	29
Apr 2018	7	13	0	20
May 2018	17	12	0	29
Jun 2018	10	7	1	18
Jul 2018	8	10	0	18
Aug 2018	16	12	0	28
Sep 2018	9	8	0	17
Oct 2018	11	6	1	18
Nov 2018	14	11	4	29
Dec 2018	11	5	1	17
Jan 2019	5	9	1	15
Feb 2019	5	6	0	11
Mar 2019	13	5	0	18
Apr 2019	5	3	0	8
May 2019	8	5	0	13
Jun 2019	4	5	0	9
Jul 2019	5	6	0	11
Aug 2019	3	5	0	8
Sep 2019	1	5	0	6
Oct 2019	6	7	1	14
Nov 2019	4	5	0	9
Dec 2019	4	5	0	9
Jan 2020	6	7	0	13
Feb 2020	7	3	0	10
Mar 2020	2	6	0	8
Apr 2020	5	5	0	10
May 2020	4	2	0	6
Jun 2020	13	10	0	23
Jul 2020	13	16	4	33
Aug 2020	9	5	1	15
Sep 2020	11	3	0	14
Oct 2020	7	3	0	10
Nov 2020	6	8	0	14
Dec 2020	8	3	0	11
Jan 2021	10	7	0	17
Feb 2021	7	8	0	15
Mar 2021	10	7	0	17
Apr 2021	9	9	0	18
May 2021	6	4	2	12
Jun 2021	7	8	0	15
Jul 2021	10	5	0	15
Aug 2021	10	10	0	20
Sep 2021	11	8	1	20
Oct 2021	15	51	3	69
Nov 2021	7	29	0	36
Dec 2021	12	20	0	32
Jan 2022	10	11	1	22
Feb 2022	4	8	1	13
Mar 2022	21	14	1	36
Apr 2022	7	8	2	17
May 2022	7	6	0	13
Jun 2022	6	4	0	10
Jul 2022	5	2	0	7
Aug 2022	14	4	0	18
Sep 2022	6	2	0	8
Oct 2022	7	7	1	15
Nov 2022	20	9	0	29
Dec 2022	16	5	2	23
Jan 2023	7	9	0	16
Feb 2023	17	10	4	31
Mar 2023	20	9	1	30
Apr 2023	9	4	2	15
May 2023	29	9	0	38
Jun 2023	39	5	2	46
Jul 2023	36	5	1	42
Aug 2023	38	6	2	46
Sep 2023	37	3	0	40
Oct 2023	39	14	2	55
Nov 2023	25	3	1	29
Dec 2023	48	12	3	63
Jan 2024	35	12	0	47
Feb 2024	33	4	0	37
Mar 2024	46	16	1	63
Apr 2024	38	14	4	56
May 2024	20	14	0	34
Jun 2024	11	4	1	16
Jul 2024	10	8	3	21
Aug 2024	23	6	3	32
Sep 2024	16	3	0	19
Oct 2024	10	8	0	18
Nov 2024	10	4	2	16
Dec 2024	9	6	2	17
Jan 2025	24	7	2	33
Feb 2025	28	3	2	33
Mar 2025	20	14	2	36
Apr 2025	16	18	0	34
May 2025	18	10	3	31
Jun 2025	39	7	3	49
Jul 2025	22	14	0	36
Aug 2025	16	11	0	27
Sep 2025	27	16	3	46
Oct 2025	23	25	1	49
Nov 2025	24	15	5	44

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Total article views: 3,276 (including HTML, PDF, and XML) Thereof 3,276 with geography defined and 0 with unknown origin.

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Short summary

Observations over a continuous 3-month period in Beijing showed 26 new particle formation (NPF) events, generally coinciding with periods with relatively clean air when the wind direction was from the less industrialized north. Large particles in the atmosphere suppress the gaseous supersaturation that is required for NPF. No events were observed when the daily mean PM_2.5 concentration exceeded 43 µg m⁻³. These results provide useful insight into the formation of haze events in megacities.


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