Ice-nucleating particle versus ice crystal number concentrationin altocumulus and cirrus layers embedded in Saharan dust:a closure study

Ansmann, Albert; Mamouri, Rodanthi-Elisavet; Bühl, Johannes; Seifert, Patric; Engelmann, Ronny; Hofer, Julian; Nisantzi, Argyro; Atkinson, James D.; Kanji, Zamin A.; Sierau, Berko; Vrekoussis, Mihalis; Sciare, Jean

doi:10.5194/acp-19-15087-2019

Articles | Volume 19, issue 23

https://doi.org/10.5194/acp-19-15087-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

BACCHUS – Impact of Biogenic versus Anthropogenic emissions...

https://doi.org/10.5194/acp-19-15087-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 19, issue 23

Research article

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13 Dec 2019

Research article | Highlight paper |

| 13 Dec 2019

Ice-nucleating particle versus ice crystal number concentrationin altocumulus and cirrus layers embedded in Saharan dust:a closure study

Albert Ansmann, Rodanthi-Elisavet Mamouri, Johannes Bühl, Patric Seifert, Ronny Engelmann, Julian Hofer, Argyro Nisantzi, James D. Atkinson, Zamin A. Kanji, Berko Sierau, Mihalis Vrekoussis, and Jean Sciare

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Nov 2019	16	5	1	22
Dec 2019	273	73	5	351
Jan 2020	196	68	1	265
Feb 2020	139	34	2	175
Mar 2020	100	29	0	129
Apr 2020	77	23	0	100
May 2020	106	10	2	118
Jun 2020	66	17	0	83
Jul 2020	73	28	6	107
Aug 2020	56	15	1	72
Sep 2020	71	15	1	87
Oct 2020	43	21	0	64
Nov 2020	37	15	1	53
Dec 2020	62	12	0	74
Jan 2021	80	19	0	99
Feb 2021	68	12	0	80
Mar 2021	67	16	0	83
Apr 2021	76	7	0	83
May 2021	62	6	1	69
Jun 2021	75	12	0	87
Jul 2021	65	25	0	90
Aug 2021	56	12	1	69
Sep 2021	78	17	1	96
Oct 2021	56	41	0	97
Nov 2021	63	33	3	99
Dec 2021	68	12	2	82
Jan 2022	62	16	4	82
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Apr 2022	82	16	2	100
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Jul 2022	59	9	0	68
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Sep 2022	52	10	0	62
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Jul 2023	57	10	1	68
Aug 2023	80	16	4	100
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Oct 2023	54	12	1	67
Nov 2023	30	6	0	36
Dec 2023	43	18	1	62
Jan 2024	275	21	1	297
Feb 2024	22	12	0	34
Mar 2024	35	26	3	64
Apr 2024	158	25	4	187
May 2024	31	21	1	53
Jun 2024	120	10	1	131
Jul 2024	337	9	3	349
Aug 2024	33	7	2	42
Sep 2024	33	8	0	41
Oct 2024	39	13	1	53
Nov 2024	29	17	2	48
Dec 2024	32	13	1	46
Jan 2025	42	15	1	58
Feb 2025	55	23	0	78
Mar 2025	33	11	2	46
Apr 2025	40	41	0	81
May 2025	62	58	3	123
Jun 2025	62	26	3	91
Jul 2025	55	27	3	85
Aug 2025	87	23	2	112
Sep 2025	99	7	3	109
Oct 2025	46	33	1	80
Nov 2025	127	72	5	204
Dec 2025	26	19	0	45

Cumulative views and downloads (calculated since 16 May 2019)

Month	HTML	PDF	XML	Total
May 2019	177	64	4	245
Jun 2019	37	19	0	56
Jul 2019	21	12	0	33
Aug 2019	14	3	0	17
Sep 2019	25	8	0	33
Oct 2019	18	13	0	31
Nov 2019	16	5	1	22
Dec 2019	273	73	5	351
Jan 2020	196	68	1	265
Feb 2020	139	34	2	175
Mar 2020	100	29	0	129
Apr 2020	77	23	0	100
May 2020	106	10	2	118
Jun 2020	66	17	0	83
Jul 2020	73	28	6	107
Aug 2020	56	15	1	72
Sep 2020	71	15	1	87
Oct 2020	43	21	0	64
Nov 2020	37	15	1	53
Dec 2020	62	12	0	74
Jan 2021	80	19	0	99
Feb 2021	68	12	0	80
Mar 2021	67	16	0	83
Apr 2021	76	7	0	83
May 2021	62	6	1	69
Jun 2021	75	12	0	87
Jul 2021	65	25	0	90
Aug 2021	56	12	1	69
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Nov 2021	63	33	3	99
Dec 2021	68	12	2	82
Jan 2022	62	16	4	82
Feb 2022	58	11	2	71
Mar 2022	105	19	1	125
Apr 2022	82	16	2	100
May 2022	58	14	1	73
Jun 2022	60	10	2	72
Jul 2022	59	9	0	68
Aug 2022	64	15	0	79
Sep 2022	52	10	0	62
Oct 2022	36	5	0	41
Nov 2022	64	15	0	79
Dec 2022	61	11	0	72
Jan 2023	60	12	0	72
Feb 2023	66	12	0	78
Mar 2023	106	12	1	119
Apr 2023	62	18	0	80
May 2023	65	16	2	83
Jun 2023	61	11	1	73
Jul 2023	57	10	1	68
Aug 2023	80	16	4	100
Sep 2023	116	15	1	132
Oct 2023	54	12	1	67
Nov 2023	30	6	0	36
Dec 2023	43	18	1	62
Jan 2024	275	21	1	297
Feb 2024	22	12	0	34
Mar 2024	35	26	3	64
Apr 2024	158	25	4	187
May 2024	31	21	1	53
Jun 2024	120	10	1	131
Jul 2024	337	9	3	349
Aug 2024	33	7	2	42
Sep 2024	33	8	0	41
Oct 2024	39	13	1	53
Nov 2024	29	17	2	48
Dec 2024	32	13	1	46
Jan 2025	42	15	1	58
Feb 2025	55	23	0	78
Mar 2025	33	11	2	46
Apr 2025	40	41	0	81
May 2025	62	58	3	123
Jun 2025	62	26	3	91
Jul 2025	55	27	3	85
Aug 2025	87	23	2	112
Sep 2025	99	7	3	109
Oct 2025	46	33	1	80
Nov 2025	127	72	5	204
Dec 2025	26	19	0	45

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Short summary

For the first time, a closure study of the relationship between the ice-nucleating particle concentration (INPC) and ice crystal number concentration (ICNC) in altocumulus and cirrus layers, solely based on ground-based active remote sensing, is presented. The closure studies were conducted in Cyprus. A focus was on altocumulus and cirrus layers which developed in pronounced Saharan dust layers. The closure studies show that heterogeneous ice nucleation can play a dominant role in ice formation.


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