20 years of ClO measurements in the Antarctic lower stratosphere

Nedoluha, Gerald E.; Connor, Brian J.; Mooney, Thomas; Barrett, James W.; Parrish, Alan; Gomez, R. Michael; Boyd, Ian; Allen, Douglas R.; Kotkamp, Michael; Kremser, Stefanie; Deshler, Terry; Newman, Paul; Santee, Michelle L.

doi:10.5194/acp-16-10725-2016

Articles | Volume 16, issue 16

https://doi.org/10.5194/acp-16-10725-2016

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

Special issue:

Twenty-five years of operations of the Network for the Detection...

https://doi.org/10.5194/acp-16-10725-2016

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

Articles | Volume 16, issue 16

Research article

|

30 Aug 2016

Research article |

| 30 Aug 2016

20 years of ClO measurements in the Antarctic lower stratosphere

Gerald E. Nedoluha, Brian J. Connor, Thomas Mooney, James W. Barrett, Alan Parrish, R. Michael Gomez, Ian Boyd, Douglas R. Allen, Michael Kotkamp, Stefanie Kremser, Terry Deshler, Paul Newman, and Michelle L. Santee

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Aug 2016	50	22	2	74
Sep 2016	85	28	3	116
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Jan 2017	14	4	1	19
Feb 2017	13	6	1	20
Mar 2017	19	13	3	35
Apr 2017	24	18	0	42
May 2017	35	12	1	48
Jun 2017	26	3	4	33
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Nov 2017	16	9	0	25
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Mar 2018	17	8	2	27
Apr 2018	24	12	0	36
May 2018	17	7	0	24
Jun 2018	17	9	0	26
Jul 2018	6	4	1	11
Aug 2018	23	6	0	29
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Oct 2018	25	8	4	37
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Feb 2019	5	2	2	9
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May 2019	16	4	0	20
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Dec 2019	9	6	2	17
Jan 2020	10	8	2	20
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Mar 2020	4	4	4	12
Apr 2020	2	4	2	8
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Jun 2020	11	18	1	30
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Oct 2020	8	11	0	19
Nov 2020	4	9	5	18
Dec 2020	9	9	3	21
Jan 2021	14	17	1	32
Feb 2021	8	18	1	27
Mar 2021	12	13	3	28
Apr 2021	9	14	2	25
May 2021	9	10	5	24
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Jul 2021	10	10	4	24
Aug 2021	5	14	0	19
Sep 2021	6	9	1	16
Oct 2021	13	30	1	44
Nov 2021	13	28	4	45
Dec 2021	10	14	1	25
Jan 2022	14	10	2	26
Feb 2022	18	6	5	29
Mar 2022	14	6	4	24
Apr 2022	8	10	9	27
May 2022	2	9	1	12
Jun 2022	5	9	0	14
Jul 2022	9	4	0	13
Aug 2022	14	7	3	24
Sep 2022	9	7	4	20
Oct 2022	6	9	1	16
Nov 2022	16	8	3	27
Dec 2022	13	5	1	19
Jan 2023	4	10	0	14
Feb 2023	14	9	0	23
Mar 2023	26	12	1	39
Apr 2023	5	7	0	12
May 2023	28	8	0	36
Jun 2023	44	5	1	50
Jul 2023	49	7	3	59
Aug 2023	35	9	1	45
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Oct 2023	42	10	2	54
Nov 2023	36	9	1	46
Dec 2023	45	14	4	63
Jan 2024	43	8	0	51
Feb 2024	45	13	0	58
Mar 2024	45	13	2	60
Apr 2024	50	8	1	59
May 2024	28	18	2	48
Jun 2024	55	8	2	65
Jul 2024	15	6	1	22
Aug 2024	49	7	5	61
Sep 2024	15	5	0	20
Oct 2024	27	6	0	33
Nov 2024	44	4	3	51
Dec 2024	42	8	1	51
Jan 2025	59	9	3	71
Feb 2025	55	12	7	74
Mar 2025	20	7	2	29
Apr 2025	18	8	3	29
May 2025	16	7	1	24
Jun 2025	40	10	4	54
Jul 2025	35	16	2	53
Aug 2025	37	17	3	57
Sep 2025	52	16	1	69
Oct 2025	21	14	0	35
Nov 2025	31	11	4	46

Cumulative views and downloads (calculated since 05 Apr 2016)

Month	HTML	PDF	XML	Total
Apr 2016	139	36	1	176
May 2016	13	5	0	18
Jun 2016	11	1	1	13
Jul 2016	10	10	1	21
Aug 2016	50	22	2	74
Sep 2016	85	28	3	116
Oct 2016	19	7	0	26
Nov 2016	14	7	0	21
Dec 2016	4	1	0	5
Jan 2017	14	4	1	19
Feb 2017	13	6	1	20
Mar 2017	19	13	3	35
Apr 2017	24	18	0	42
May 2017	35	12	1	48
Jun 2017	26	3	4	33
Jul 2017	21	5	1	27
Aug 2017	16	7	0	23
Sep 2017	19	8	2	29
Oct 2017	21	15	1	37
Nov 2017	16	9	0	25
Dec 2017	12	6	1	19
Jan 2018	15	8	0	23
Feb 2018	7	6	0	13
Mar 2018	17	8	2	27
Apr 2018	24	12	0	36
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Jun 2018	17	9	0	26
Jul 2018	6	4	1	11
Aug 2018	23	6	0	29
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Oct 2018	25	8	4	37
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Feb 2021	8	18	1	27
Mar 2021	12	13	3	28
Apr 2021	9	14	2	25
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Jun 2021	13	18	4	35
Jul 2021	10	10	4	24
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Nov 2022	16	8	3	27
Dec 2022	13	5	1	19
Jan 2023	4	10	0	14
Feb 2023	14	9	0	23
Mar 2023	26	12	1	39
Apr 2023	5	7	0	12
May 2023	28	8	0	36
Jun 2023	44	5	1	50
Jul 2023	49	7	3	59
Aug 2023	35	9	1	45
Sep 2023	43	8	0	51
Oct 2023	42	10	2	54
Nov 2023	36	9	1	46
Dec 2023	45	14	4	63
Jan 2024	43	8	0	51
Feb 2024	45	13	0	58
Mar 2024	45	13	2	60
Apr 2024	50	8	1	59
May 2024	28	18	2	48
Jun 2024	55	8	2	65
Jul 2024	15	6	1	22
Aug 2024	49	7	5	61
Sep 2024	15	5	0	20
Oct 2024	27	6	0	33
Nov 2024	44	4	3	51
Dec 2024	42	8	1	51
Jan 2025	59	9	3	71
Feb 2025	55	12	7	74
Mar 2025	20	7	2	29
Apr 2025	18	8	3	29
May 2025	16	7	1	24
Jun 2025	40	10	4	54
Jul 2025	35	16	2	53
Aug 2025	37	17	3	57
Sep 2025	52	16	1	69
Oct 2025	21	14	0	35
Nov 2025	31	11	4	46

Latest update: 25 Nov 2025

Short summary

Chlorine monoxide (ClO) is central to the formation of the springtime Antarctic ozone hole since it is the catalytic agent in the most important ozone-depleting chemical cycle. We present 20 years of measurements of ClO from the Chlorine monOxide Experiment at Scott Base, Antarctica, and 12 years of measurements from the Aura Microwave Limb Sounder to show that the trends in ClO during the ozone hole season are consistent with changes in stratospheric chlorine observed elsewhere.