Phase state of ambient aerosol linked with water uptake and chemical
aging in the southeastern US

Pajunoja, Aki; Hu, Weiwei; Leong, Yu J.; Taylor, Nathan F.; Miettinen, Pasi; Palm, Brett B.; Mikkonen, Santtu; Collins, Don R.; Jimenez, Jose L.; Virtanen, Annele

doi:10.5194/acp-16-11163-2016

Articles | Volume 16, issue 17

https://doi.org/10.5194/acp-16-11163-2016

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

https://doi.org/10.5194/acp-16-11163-2016

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

Articles | Volume 16, issue 17

Research article

|

09 Sep 2016

Research article |

| 09 Sep 2016

Phase state of ambient aerosol linked with water uptake and chemical aging in the southeastern US

Aki Pajunoja, Weiwei Hu, Yu J. Leong, Nathan F. Taylor, Pasi Miettinen, Brett B. Palm, Santtu Mikkonen, Don R. Collins, Jose L. Jimenez, and Annele Virtanen

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Views and downloads (calculated since 09 May 2016)

Month	HTML	PDF	XML	Total
May 2016	142	54	2	198
Jun 2016	28	12	1	41
Jul 2016	22	16	2	40
Aug 2016	25	8	1	34
Sep 2016	144	56	4	204
Oct 2016	31	21	3	55
Nov 2016	10	7	0	17
Dec 2016	11	11	0	22
Jan 2017	27	13	1	41
Feb 2017	18	11	1	30
Mar 2017	27	17	2	46
Apr 2017	28	22	0	50
May 2017	32	24	0	56
Jun 2017	24	18	0	42
Jul 2017	22	13	0	35
Aug 2017	20	15	1	36
Sep 2017	19	11	0	30
Oct 2017	11	12	0	23
Nov 2017	17	16	0	33
Dec 2017	11	16	0	27
Jan 2018	12	11	1	24
Feb 2018	13	14	0	27
Mar 2018	15	12	2	29
Apr 2018	12	10	0	22
May 2018	19	11	0	30
Jun 2018	8	11	1	20
Jul 2018	6	10	0	16
Aug 2018	24	18	0	42
Sep 2018	14	15	0	29
Oct 2018	20	11	3	34
Nov 2018	15	11	3	29
Dec 2018	12	5	0	17
Jan 2019	6	6	1	13
Feb 2019	4	4	0	8
Mar 2019	9	3	1	13
Apr 2019	6	6	0	12
May 2019	11	13	0	24
Jun 2019	6	3	0	9
Jul 2019	9	12	0	21
Aug 2019	5	4	0	9
Sep 2019	7	7	1	15
Oct 2019	15	8	2	25
Nov 2019	10	6	0	16
Dec 2019	7	6	2	15
Jan 2020	13	6	0	19
Feb 2020	7	2	1	10
Mar 2020	6	3	0	9
Apr 2020	4	6	0	10
May 2020	8	6	2	16
Jun 2020	17	12	0	29
Jul 2020	16	14	4	34
Aug 2020	13	2	2	17
Sep 2020	11	2	2	15
Oct 2020	9	5	1	15
Nov 2020	12	6	1	19
Dec 2020	12	4	0	16
Jan 2021	15	7	0	22
Feb 2021	10	3	0	13
Mar 2021	13	6	1	20
Apr 2021	17	10	1	28
May 2021	9	4	2	15
Jun 2021	9	2	0	11
Jul 2021	10	6	0	16
Aug 2021	8	12	0	20
Sep 2021	10	13	0	23
Oct 2021	13	40	0	53
Nov 2021	17	31	1	49
Dec 2021	13	14	0	27
Jan 2022	20	20	2	42
Feb 2022	10	7	1	18
Mar 2022	28	11	0	39
Apr 2022	13	8	1	22
May 2022	15	6	1	22
Jun 2022	9	9	1	19
Jul 2022	8	7	1	16
Aug 2022	24	8	0	32
Sep 2022	10	7	1	18
Oct 2022	10	6	1	17
Nov 2022	20	9	0	29
Dec 2022	12	3	0	15
Jan 2023	19	20	2	41
Feb 2023	14	15	0	29
Mar 2023	15	12	0	27
Apr 2023	14	14	1	29
May 2023	34	7	1	42
Jun 2023	45	16	1	62
Jul 2023	37	9	1	47
Aug 2023	41	9	2	52
Sep 2023	43	7	1	51
Oct 2023	50	6	1	57
Nov 2023	29	6	0	35
Dec 2023	49	2	3	54
Jan 2024	41	4	0	45
Feb 2024	42	9	0	51
Mar 2024	52	23	0	75
Apr 2024	48	12	5	65
May 2024	17	13	1	31
Jun 2024	20	16	2	38
Jul 2024	18	8	3	29
Aug 2024	19	5	2	26
Sep 2024	12	4	0	16
Oct 2024	20	7	0	27
Nov 2024	14	6	2	22
Dec 2024	15	4	1	20
Jan 2025	29	13	5	47
Feb 2025	39	14	5	58
Mar 2025	20	11	5	36
Apr 2025	169	14	0	183
May 2025	113	12	0	125
Jun 2025	57	14	1	72
Jul 2025	36	13	1	50
Aug 2025	83	20	0	103
Sep 2025	112	17	2	131
Oct 2025	22	22	0	44
Nov 2025	30	17	2	49
Dec 2025	7	2	0	9

Cumulative views and downloads (calculated since 09 May 2016)

Month	HTML	PDF	XML	Total
May 2016	142	54	2	198
Jun 2016	28	12	1	41
Jul 2016	22	16	2	40
Aug 2016	25	8	1	34
Sep 2016	144	56	4	204
Oct 2016	31	21	3	55
Nov 2016	10	7	0	17
Dec 2016	11	11	0	22
Jan 2017	27	13	1	41
Feb 2017	18	11	1	30
Mar 2017	27	17	2	46
Apr 2017	28	22	0	50
May 2017	32	24	0	56
Jun 2017	24	18	0	42
Jul 2017	22	13	0	35
Aug 2017	20	15	1	36
Sep 2017	19	11	0	30
Oct 2017	11	12	0	23
Nov 2017	17	16	0	33
Dec 2017	11	16	0	27
Jan 2018	12	11	1	24
Feb 2018	13	14	0	27
Mar 2018	15	12	2	29
Apr 2018	12	10	0	22
May 2018	19	11	0	30
Jun 2018	8	11	1	20
Jul 2018	6	10	0	16
Aug 2018	24	18	0	42
Sep 2018	14	15	0	29
Oct 2018	20	11	3	34
Nov 2018	15	11	3	29
Dec 2018	12	5	0	17
Jan 2019	6	6	1	13
Feb 2019	4	4	0	8
Mar 2019	9	3	1	13
Apr 2019	6	6	0	12
May 2019	11	13	0	24
Jun 2019	6	3	0	9
Jul 2019	9	12	0	21
Aug 2019	5	4	0	9
Sep 2019	7	7	1	15
Oct 2019	15	8	2	25
Nov 2019	10	6	0	16
Dec 2019	7	6	2	15
Jan 2020	13	6	0	19
Feb 2020	7	2	1	10
Mar 2020	6	3	0	9
Apr 2020	4	6	0	10
May 2020	8	6	2	16
Jun 2020	17	12	0	29
Jul 2020	16	14	4	34
Aug 2020	13	2	2	17
Sep 2020	11	2	2	15
Oct 2020	9	5	1	15
Nov 2020	12	6	1	19
Dec 2020	12	4	0	16
Jan 2021	15	7	0	22
Feb 2021	10	3	0	13
Mar 2021	13	6	1	20
Apr 2021	17	10	1	28
May 2021	9	4	2	15
Jun 2021	9	2	0	11
Jul 2021	10	6	0	16
Aug 2021	8	12	0	20
Sep 2021	10	13	0	23
Oct 2021	13	40	0	53
Nov 2021	17	31	1	49
Dec 2021	13	14	0	27
Jan 2022	20	20	2	42
Feb 2022	10	7	1	18
Mar 2022	28	11	0	39
Apr 2022	13	8	1	22
May 2022	15	6	1	22
Jun 2022	9	9	1	19
Jul 2022	8	7	1	16
Aug 2022	24	8	0	32
Sep 2022	10	7	1	18
Oct 2022	10	6	1	17
Nov 2022	20	9	0	29
Dec 2022	12	3	0	15
Jan 2023	19	20	2	41
Feb 2023	14	15	0	29
Mar 2023	15	12	0	27
Apr 2023	14	14	1	29
May 2023	34	7	1	42
Jun 2023	45	16	1	62
Jul 2023	37	9	1	47
Aug 2023	41	9	2	52
Sep 2023	43	7	1	51
Oct 2023	50	6	1	57
Nov 2023	29	6	0	35
Dec 2023	49	2	3	54
Jan 2024	41	4	0	45
Feb 2024	42	9	0	51
Mar 2024	52	23	0	75
Apr 2024	48	12	5	65
May 2024	17	13	1	31
Jun 2024	20	16	2	38
Jul 2024	18	8	3	29
Aug 2024	19	5	2	26
Sep 2024	12	4	0	16
Oct 2024	20	7	0	27
Nov 2024	14	6	2	22
Dec 2024	15	4	1	20
Jan 2025	29	13	5	47
Feb 2025	39	14	5	58
Mar 2025	20	11	5	36
Apr 2025	169	14	0	183
May 2025	113	12	0	125
Jun 2025	57	14	1	72
Jul 2025	36	13	1	50
Aug 2025	83	20	0	103
Sep 2025	112	17	2	131
Oct 2025	22	22	0	44
Nov 2025	30	17	2	49
Dec 2025	7	2	0	9

Latest update: 06 Dec 2025

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Short summary

The phase state of ambient particles was inferred from bounce measurements conducted at a rural site in central Alabama during the SOAS campaign. The organic-dominated ambient particles are mostly in the liquid phase at summertime conditions but they turn semisolid when dried in the measurement setup. Bounce humidograms reveal that the hygroscopicity and oxidation of the particles decreases the liquefying RH. The effect of oxidation is emphasized by oxidation flow reactor measurements.