The immersion freezing behavior of ash particles from wood and brown coal burning

Grawe, Sarah; Augustin-Bauditz, Stefanie; Hartmann, Susan; Hellner, Lisa; Pettersson, Jan B. C.; Prager, Andrea; Stratmann, Frank; Wex, Heike

doi:10.5194/acp-16-13911-2016

Articles | Volume 16, issue 21

https://doi.org/10.5194/acp-16-13911-2016

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

Special issue:

Results from the ice nucleation research unit (INUIT) (ACP/AMT...

https://doi.org/10.5194/acp-16-13911-2016

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

Articles | Volume 16, issue 21

Research article

|

10 Nov 2016

Research article |

| 10 Nov 2016

The immersion freezing behavior of ash particles from wood and brown coal burning

Sarah Grawe, Stefanie Augustin-Bauditz, Susan Hartmann, Lisa Hellner, Jan B. C. Pettersson, Andrea Prager, Frank Stratmann, and Heike Wex

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May 2016	34	5	1	40
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Jul 2016	11	7	0	18
Aug 2016	20	8	2	30
Sep 2016	14	4	1	19
Oct 2016	7	5	3	15
Nov 2016	83	32	9	124
Dec 2016	12	24	0	36
Jan 2017	26	14	1	41
Feb 2017	10	10	2	22
Mar 2017	30	39	2	71
Apr 2017	27	25	2	54
May 2017	30	28	1	59
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Apr 2018	13	22	3	38
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Jan 2025	14	9	3	26
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Mar 2025	20	7	0	27
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May 2025	26	7	0	33
Jun 2025	43	10	1	54
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Aug 2025	80	19	0	99
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Cumulative views and downloads (calculated since 31 Mar 2016)

Month	HTML	PDF	XML	Total
Apr 2016	150	62	1	213
May 2016	34	5	1	40
Jun 2016	13	5	0	18
Jul 2016	11	7	0	18
Aug 2016	20	8	2	30
Sep 2016	14	4	1	19
Oct 2016	7	5	3	15
Nov 2016	83	32	9	124
Dec 2016	12	24	0	36
Jan 2017	26	14	1	41
Feb 2017	10	10	2	22
Mar 2017	30	39	2	71
Apr 2017	27	25	2	54
May 2017	30	28	1	59
Jun 2017	18	10	1	29
Jul 2017	19	8	0	27
Aug 2017	14	17	0	31
Sep 2017	17	17	0	34
Oct 2017	16	19	0	35
Nov 2017	8	26	3	37
Dec 2017	6	18	2	26
Jan 2018	11	14	1	26
Feb 2018	8	10	2	20
Mar 2018	18	19	6	43
Apr 2018	13	22	3	38
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Oct 2023	57	13	2	72
Nov 2023	29	5	0	34
Dec 2023	50	15	3	68
Jan 2024	37	20	0	57
Feb 2024	43	12	1	56
Mar 2024	49	18	2	69
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May 2024	24	9	2	35
Jun 2024	47	12	1	60
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Aug 2025	80	19	0	99
Sep 2025	41	22	5	68
Oct 2025	23	24	0	47
Nov 2025	26	24	0	50

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Short summary

In this study the freezing behavior of ash particles immersed in supercooled cloud droplets was investigated. It was found that ash from coal burning initiates freezing well above the limit for homogeneous ice nucleation and may contribute to cloud glaciation and precipitation formation on a regional scale. Furthermore, the experimental results were influenced by a change in sample preparation and/or particle generation which must be accounted for when comparing to previous studies.