Nighttime atmospheric chemistry of iodine

Saiz-Lopez, Alfonso; Plane, John M. C.; Cuevas, Carlos A.; Mahajan, Anoop S.; Lamarque, Jean-François; Kinnison, Douglas E.

doi:10.5194/acp-16-15593-2016

Articles | Volume 16, issue 24

https://doi.org/10.5194/acp-16-15593-2016

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

https://doi.org/10.5194/acp-16-15593-2016

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

Articles | Volume 16, issue 24

Research article

|

19 Dec 2016

Research article |

| 19 Dec 2016

Nighttime atmospheric chemistry of iodine

Alfonso Saiz-Lopez, John M. C. Plane, Carlos A. Cuevas, Anoop S. Mahajan, Jean-François Lamarque, and Douglas E. Kinnison

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Jun 2016	108	38	6	152
Jul 2016	39	16	1	56
Aug 2016	9	4	1	14
Sep 2016	17	3	0	20
Oct 2016	9	4	4	17
Nov 2016	7	2	6	15
Dec 2016	107	34	1	142
Jan 2017	60	31	3	94
Feb 2017	14	9	1	24
Mar 2017	36	14	1	51
Apr 2017	31	22	3	56
May 2017	28	21	3	52
Jun 2017	23	12	3	38
Jul 2017	24	16	1	41
Aug 2017	22	22	0	44
Sep 2017	13	15	1	29
Oct 2017	13	16	0	29
Nov 2017	19	30	0	49
Dec 2017	10	13	0	23
Jan 2018	11	8	0	19
Feb 2018	11	5	0	16
Mar 2018	9	15	0	24
Apr 2018	10	12	1	23
May 2018	12	16	1	29
Jun 2018	14	17	1	32
Jul 2018	12	16	1	29
Aug 2018	13	5	0	18
Sep 2018	10	14	0	24
Oct 2018	14	18	3	35
Nov 2018	14	14	0	28
Dec 2018	10	5	1	16
Jan 2019	8	10	4	22
Feb 2019	8	9	1	18
Mar 2019	6	11	0	17
Apr 2019	7	16	0	23
May 2019	6	15	0	21
Jun 2019	8	13	0	21
Jul 2019	10	17	0	27
Aug 2019	4	6	1	11
Sep 2019	14	11	0	25
Oct 2019	8	6	2	16
Nov 2019	9	8	2	19
Dec 2019	13	10	2	25
Jan 2020	7	6	0	13
Feb 2020	8	10	3	21
Mar 2020	5	3	0	8
Apr 2020	6	5	0	11
May 2020	12	4	0	16
Jun 2020	16	15	1	32
Jul 2020	10	14	4	28
Aug 2020	14	6	3	23
Sep 2020	10	7	0	17
Oct 2020	10	9	1	20
Nov 2020	15	9	1	25
Dec 2020	8	7	0	15
Jan 2021	18	11	0	29
Feb 2021	11	2	0	13
Mar 2021	10	2	0	12
Apr 2021	9	9	0	18
May 2021	10	6	1	17
Jun 2021	8	9	0	17
Jul 2021	11	9	2	22
Aug 2021	22	15	1	38
Sep 2021	13	13	1	27
Oct 2021	7	35	0	42
Nov 2021	10	28	0	38
Dec 2021	16	11	0	27
Jan 2022	20	6	2	28
Feb 2022	11	9	2	22
Mar 2022	8	6	0	14
Apr 2022	8	4	1	13
May 2022	7	15	1	23
Jun 2022	10	8	1	19
Jul 2022	5	7	0	12
Aug 2022	20	9	0	29
Sep 2022	10	4	0	14
Oct 2022	19	4	1	24
Nov 2022	20	9	0	29
Dec 2022	9	7	0	16
Jan 2023	14	16	4	34
Feb 2023	13	16	0	29
Mar 2023	16	20	0	36
Apr 2023	11	16	0	27
May 2023	34	16	1	51
Jun 2023	40	8	1	49
Jul 2023	40	12	1	53
Aug 2023	40	14	2	56
Sep 2023	48	15	0	63
Oct 2023	43	13	3	59
Nov 2023	29	4	0	33
Dec 2023	51	19	2	72
Jan 2024	33	10	0	43
Feb 2024	53	17	2	72
Mar 2024	45	12	3	60
Apr 2024	47	8	1	56
May 2024	17	15	0	32
Jun 2024	17	8	1	26
Jul 2024	23	17	2	42
Aug 2024	28	8	2	38
Sep 2024	12	7	0	19
Oct 2024	28	13	3	44
Nov 2024	24	15	4	43
Dec 2024	52	29	24	105
Jan 2025	73	39	25	137
Feb 2025	77	29	21	127
Mar 2025	24	18	5	47
Apr 2025	30	14	0	44
May 2025	36	12	0	48
Jun 2025	61	22	3	86
Jul 2025	40	17	0	57
Aug 2025	49	18	1	68
Sep 2025	71	21	1	93
Oct 2025	22	28	0	50
Nov 2025	4	6	0	10

Cumulative views and downloads (calculated since 15 Jun 2016)

Month	HTML	PDF	XML	Total
Jun 2016	108	38	6	152
Jul 2016	39	16	1	56
Aug 2016	9	4	1	14
Sep 2016	17	3	0	20
Oct 2016	9	4	4	17
Nov 2016	7	2	6	15
Dec 2016	107	34	1	142
Jan 2017	60	31	3	94
Feb 2017	14	9	1	24
Mar 2017	36	14	1	51
Apr 2017	31	22	3	56
May 2017	28	21	3	52
Jun 2017	23	12	3	38
Jul 2017	24	16	1	41
Aug 2017	22	22	0	44
Sep 2017	13	15	1	29
Oct 2017	13	16	0	29
Nov 2017	19	30	0	49
Dec 2017	10	13	0	23
Jan 2018	11	8	0	19
Feb 2018	11	5	0	16
Mar 2018	9	15	0	24
Apr 2018	10	12	1	23
May 2018	12	16	1	29
Jun 2018	14	17	1	32
Jul 2018	12	16	1	29
Aug 2018	13	5	0	18
Sep 2018	10	14	0	24
Oct 2018	14	18	3	35
Nov 2018	14	14	0	28
Dec 2018	10	5	1	16
Jan 2019	8	10	4	22
Feb 2019	8	9	1	18
Mar 2019	6	11	0	17
Apr 2019	7	16	0	23
May 2019	6	15	0	21
Jun 2019	8	13	0	21
Jul 2019	10	17	0	27
Aug 2019	4	6	1	11
Sep 2019	14	11	0	25
Oct 2019	8	6	2	16
Nov 2019	9	8	2	19
Dec 2019	13	10	2	25
Jan 2020	7	6	0	13
Feb 2020	8	10	3	21
Mar 2020	5	3	0	8
Apr 2020	6	5	0	11
May 2020	12	4	0	16
Jun 2020	16	15	1	32
Jul 2020	10	14	4	28
Aug 2020	14	6	3	23
Sep 2020	10	7	0	17
Oct 2020	10	9	1	20
Nov 2020	15	9	1	25
Dec 2020	8	7	0	15
Jan 2021	18	11	0	29
Feb 2021	11	2	0	13
Mar 2021	10	2	0	12
Apr 2021	9	9	0	18
May 2021	10	6	1	17
Jun 2021	8	9	0	17
Jul 2021	11	9	2	22
Aug 2021	22	15	1	38
Sep 2021	13	13	1	27
Oct 2021	7	35	0	42
Nov 2021	10	28	0	38
Dec 2021	16	11	0	27
Jan 2022	20	6	2	28
Feb 2022	11	9	2	22
Mar 2022	8	6	0	14
Apr 2022	8	4	1	13
May 2022	7	15	1	23
Jun 2022	10	8	1	19
Jul 2022	5	7	0	12
Aug 2022	20	9	0	29
Sep 2022	10	4	0	14
Oct 2022	19	4	1	24
Nov 2022	20	9	0	29
Dec 2022	9	7	0	16
Jan 2023	14	16	4	34
Feb 2023	13	16	0	29
Mar 2023	16	20	0	36
Apr 2023	11	16	0	27
May 2023	34	16	1	51
Jun 2023	40	8	1	49
Jul 2023	40	12	1	53
Aug 2023	40	14	2	56
Sep 2023	48	15	0	63
Oct 2023	43	13	3	59
Nov 2023	29	4	0	33
Dec 2023	51	19	2	72
Jan 2024	33	10	0	43
Feb 2024	53	17	2	72
Mar 2024	45	12	3	60
Apr 2024	47	8	1	56
May 2024	17	15	0	32
Jun 2024	17	8	1	26
Jul 2024	23	17	2	42
Aug 2024	28	8	2	38
Sep 2024	12	7	0	19
Oct 2024	28	13	3	44
Nov 2024	24	15	4	43
Dec 2024	52	29	24	105
Jan 2025	73	39	25	137
Feb 2025	77	29	21	127
Mar 2025	24	18	5	47
Apr 2025	30	14	0	44
May 2025	36	12	0	48
Jun 2025	61	22	3	86
Jul 2025	40	17	0	57
Aug 2025	49	18	1	68
Sep 2025	71	21	1	93
Oct 2025	22	28	0	50
Nov 2025	4	6	0	10

Latest update: 08 Nov 2025

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Short summary

Electronic structure calculations are used to survey possible reactions that HOI and I₂ could undergo at night in the lower troposphere, and hence reconcile measurements and models. The reactions NO₃ + HOI and I₂ + NO₃ are included in two models to explore a new nocturnal iodine radical activation mechanism, leading to a reduction of nighttime HOI and I₂. This chemistry can have a large impact on NO₃ levels in the MBL, and hence upon the nocturnal oxidizing capacity of the marine atmosphere.