Particle hygroscopicity and its link to chemical composition in the urban atmosphere of Beijing, China, during summertime

Wu, Z. J.; Zheng, J.; Shang, D. J.; Du, Z. F.; Wu, Y. S.; Zeng, L. M.; Wiedensohler, A.; Hu, M.

doi:10.5194/acp-16-1123-2016

Articles | Volume 16, issue 2

https://doi.org/10.5194/acp-16-1123-2016

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

https://doi.org/10.5194/acp-16-1123-2016

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

Articles | Volume 16, issue 2

Research article

|

01 Feb 2016

Research article |

| 01 Feb 2016

Particle hygroscopicity and its link to chemical composition in the urban atmosphere of Beijing, China, during summertime

Z. J. Wu, J. Zheng, D. J. Shang, Z. F. Du, Y. S. Wu, L. M. Zeng, A. Wiedensohler, and M. Hu

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Nov 2015	21	50	6	77
Dec 2015	10	44	4	58
Jan 2016	36	35	4	75
Feb 2016	161	86	4	251
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Jun 2016	22	22	1	45
Jul 2016	13	22	4	39
Aug 2016	13	17	0	30
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Oct 2016	18	17	0	35
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Jan 2017	20	18	1	39
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Aug 2017	17	14	1	32
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Jul 2018	9	30	1	40
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Mar 2019	6	22	1	29
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Dec 2019	14	17	2	33
Jan 2020	8	7	1	16
Feb 2020	13	14	1	28
Mar 2020	7	11	2	20
Apr 2020	10	10	1	21
May 2020	10	15	1	26
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Oct 2020	9	11	0	20
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Apr 2022	25	16	1	42
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Jan 2023	22	17	0	39
Feb 2023	33	16	0	49
Mar 2023	37	24	0	61
Apr 2023	16	20	0	36
May 2023	53	21	3	77
Jun 2023	57	18	1	76
Jul 2023	65	17	2	84
Aug 2023	59	14	1	74
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Oct 2023	128	16	2	146
Nov 2023	111	8	0	119
Dec 2023	52	13	1	66
Jan 2024	55	15	1	71
Feb 2024	45	18	2	65
Mar 2024	73	38	2	113
Apr 2024	69	24	4	97
May 2024	40	17	3	60
Jun 2024	29	23	2	54
Jul 2024	19	23	2	44
Aug 2024	38	19	3	60
Sep 2024	25	18	1	44
Oct 2024	39	25	1	65
Nov 2024	31	33	6	70
Dec 2024	37	7	3	47
Jan 2025	31	22	5	58
Feb 2025	41	25	8	74
Mar 2025	36	14	6	56
Apr 2025	33	16	5	54
May 2025	34	12	0	46
Jun 2025	70	27	3	100
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Aug 2025	65	27	1	93
Sep 2025	79	12	2	93
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Cumulative views and downloads (calculated since 20 Apr 2015)

Month	HTML	PDF	XML	Total
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May 2015	42	80	5	127
Jun 2015	22	49	3	74
Jul 2015	16	49	1	66
Aug 2015	12	40	3	55
Sep 2015	12	46	0	58
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Mar 2023	37	24	0	61
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May 2023	53	21	3	77
Jun 2023	57	18	1	76
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Aug 2023	59	14	1	74
Sep 2023	93	10	0	103
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Dec 2023	52	13	1	66
Jan 2024	55	15	1	71
Feb 2024	45	18	2	65
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Jun 2024	29	23	2	54
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Nov 2024	31	33	6	70
Dec 2024	37	7	3	47
Jan 2025	31	22	5	58
Feb 2025	41	25	8	74
Mar 2025	36	14	6	56
Apr 2025	33	16	5	54
May 2025	34	12	0	46
Jun 2025	70	27	3	100
Jul 2025	39	19	1	59
Aug 2025	65	27	1	93
Sep 2025	79	12	2	93
Oct 2025	25	27	0	52
Nov 2025	26	16	2	44

Latest update: 19 Nov 2025

Short summary

Most pre-existing measurements lack a linkage between particle hygroscopicity and chemical composition with a high time resolution in China. Our work provided a general overview of particle hygroscopicity and its closure with chemical composition on the basis of HTDMA and AMS measurements. An increase in particle hygroscopicity with increasing air pollution level was found, as well as a quick transformation from external mixtures to internal mixtures for pre-existing particles during NPF events.