Time-dependent entrainment of smoke presents an observational challenge for assessing aerosol–cloud interactions over the southeast Atlantic Ocean

Diamond, Michael S.; Dobracki, Amie; Freitag, Steffen; Small Griswold, Jennifer D.; Heikkila, Ashley; Howell, Steven G.; Kacarab, Mary E.; Podolske, James R.; Saide, Pablo E.; Wood, Robert

doi:10.5194/acp-18-14623-2018

Articles | Volume 18, issue 19

https://doi.org/10.5194/acp-18-14623-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

New observations and related modelling studies of the aerosol–cloud–climate...

https://doi.org/10.5194/acp-18-14623-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 19

Research article

|

12 Oct 2018

Research article |

| 12 Oct 2018

Time-dependent entrainment of smoke presents an observational challenge for assessing aerosol–cloud interactions over the southeast Atlantic Ocean

Michael S. Diamond, Amie Dobracki, Steffen Freitag, Jennifer D. Small Griswold, Ashley Heikkila, Steven G. Howell, Mary E. Kacarab, James R. Podolske, Pablo E. Saide, and Robert Wood

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Mar 2023	32	14	2	48
Apr 2023	29	12	0	41
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Cumulative views and downloads (calculated since 29 Jun 2018)

Month	HTML	PDF	XML	Total
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Jul 2018	176	39	3	218
Aug 2018	60	30	2	92
Sep 2018	29	16	1	46
Oct 2018	943	78	4	1,025
Nov 2018	48	42	1	91
Dec 2018	32	21	2	55
Jan 2019	17	19	1	37
Feb 2019	25	17	0	42
Mar 2019	12	8	0	20
Apr 2019	17	10	0	27
May 2019	22	21	2	45
Jun 2019	21	10	0	31
Jul 2019	18	29	0	47
Aug 2019	10	22	1	33
Sep 2019	22	28	0	50
Oct 2019	20	20	2	42
Nov 2019	15	7	0	22
Dec 2019	25	9	5	39
Jan 2020	16	5	1	22
Feb 2020	15	8	1	24
Mar 2020	6	3	0	9
Apr 2020	8	10	1	19
May 2020	13	9	0	22
Jun 2020	15	18	0	33
Jul 2020	17	14	5	36
Aug 2020	13	7	0	20
Sep 2020	22	4	0	26
Oct 2020	13	6	1	20
Nov 2020	20	7	1	28
Dec 2020	17	5	0	22
Jan 2021	29	10	0	39
Feb 2021	23	7	0	30
Mar 2021	27	14	2	43
Apr 2021	31	20	0	51
May 2021	19	7	4	30
Jun 2021	21	5	2	28
Jul 2021	20	11	0	31
Aug 2021	22	8	1	31
Sep 2021	22	10	0	32
Oct 2021	24	39	0	63
Nov 2021	31	43	1	75
Dec 2021	28	5	0	33
Jan 2022	36	14	0	50
Feb 2022	34	10	6	50
Mar 2022	20	8	0	28
Apr 2022	19	5	1	25
May 2022	20	10	0	30
Jun 2022	25	5	3	33
Jul 2022	40	4	0	44
Aug 2022	100	4	3	107
Sep 2022	15	7	0	22
Oct 2022	23	4	1	28
Nov 2022	31	12	0	43
Dec 2022	35	4	2	41
Jan 2023	36	7	0	43
Feb 2023	34	9	1	44
Mar 2023	32	14	2	48
Apr 2023	29	12	0	41
May 2023	15	6	0	21
Jun 2023	15	10	1	26
Jul 2023	23	8	1	32
Aug 2023	9	7	2	18
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Oct 2023	26	15	2	43
Nov 2023	11	6	0	17
Dec 2023	26	9	2	37
Jan 2024	24	3	0	27
Feb 2024	12	8	0	20
Mar 2024	25	31	1	57
Apr 2024	14	15	6	35
May 2024	25	11	1	37
Jun 2024	45	9	2	56
Jul 2024	45	11	2	58
Aug 2024	61	9	4	74
Sep 2024	19	4	0	23
Oct 2024	39	7	1	47
Nov 2024	48	4	3	55
Dec 2024	20	6	1	27
Jan 2025	28	18	1	47
Feb 2025	36	79	1	116
Mar 2025	39	14	0	53
Apr 2025	37	19	3	59
May 2025	37	8	1	46
Jun 2025	51	13	3	67
Jul 2025	37	16	3	56
Aug 2025	54	20	0	74
Sep 2025	82	20	3	105
Oct 2025	24	26	1	51
Nov 2025	43	27	4	74
Dec 2025	22	11	1	34

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Short summary

Smoke from Africa can mix into clouds over the southeast Atlantic and create new droplets, which brightens the clouds, reflects more sunlight, and thus cools the region. Using aircraft data from a NASA field campaign, we find that cloud properties are correlated with smoke as expected when the smoke is below the clouds but not when smoke is above the clouds because it takes several days for clouds to mix smoke downward. We recommend methods that can track clouds as they move for future studies.


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