A very limited role of tropospheric chlorine as a sink of the greenhouse gas methane

Gromov, Sergey; Brenninkmeijer, Carl A. M.; Jöckel, Patrick

doi:10.5194/acp-18-9831-2018

Articles | Volume 18, issue 13

https://doi.org/10.5194/acp-18-9831-2018

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

Special issue:

The Modular Earth Submodel System (MESSy) (ACP/GMD inter-journal...

https://doi.org/10.5194/acp-18-9831-2018

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

Articles | Volume 18, issue 13

Research article

|

12 Jul 2018

Research article |

| 12 Jul 2018

A very limited role of tropospheric chlorine as a sink of the greenhouse gas methane

Sergey Gromov, Carl A. M. Brenninkmeijer, and Patrick Jöckel

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Jun 2018	29	12	1	42
Jul 2018	240	86	5	331
Aug 2018	52	21	0	73
Sep 2018	25	24	1	50
Oct 2018	16	14	0	30
Nov 2018	18	14	1	33
Dec 2018	16	3	0	19
Jan 2019	14	12	0	26
Feb 2019	9	10	0	19
Mar 2019	8	9	0	17
Apr 2019	10	8	0	18
May 2019	31	15	0	46
Jun 2019	20	8	0	28
Jul 2019	16	11	2	29
Aug 2019	6	7	1	14
Sep 2019	12	8	0	20
Oct 2019	32	17	1	50
Nov 2019	12	6	0	18
Dec 2019	17	10	1	28
Jan 2020	20	5	0	25
Feb 2020	14	9	1	24
Mar 2020	7	4	0	11
Apr 2020	12	5	0	17
May 2020	27	6	0	33
Jun 2020	13	8	0	21
Jul 2020	12	12	3	27
Aug 2020	16	80	2	98
Sep 2020	14	45	0	59
Oct 2020	7	9	0	16
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Dec 2020	7	3	0	10
Jan 2021	41	9	0	50
Feb 2021	7	12	0	19
Mar 2021	16	8	0	24
Apr 2021	15	5	0	20
May 2021	14	14	2	30
Jun 2021	9	8	0	17
Jul 2021	14	12	0	26
Aug 2021	26	8	1	35
Sep 2021	22	8	0	30
Oct 2021	20	37	0	57
Nov 2021	16	35	1	52
Dec 2021	29	8	0	37
Jan 2022	24	17	5	46
Feb 2022	24	9	4	37
Mar 2022	22	6	0	28
Apr 2022	28	13	3	44
May 2022	22	5	1	28
Jun 2022	28	5	0	33
Jul 2022	45	4	0	49
Aug 2022	87	7	1	95
Sep 2022	32	7	0	39
Oct 2022	6	1	0	7
Nov 2022	33	11	0	44
Dec 2022	38	6	0	44
Jan 2023	43	8	0	51
Feb 2023	33	11	1	45
Mar 2023	46	9	2	57
Apr 2023	32	1	1	34
May 2023	27	11	0	38
Jun 2023	31	8	2	41
Jul 2023	36	7	1	44
Aug 2023	19	7	3	29
Sep 2023	34	6	0	40
Oct 2023	100	12	2	114
Nov 2023	88	4	1	93
Dec 2023	43	15	1	59
Jan 2024	31	10	1	42
Feb 2024	25	12	0	37
Mar 2024	46	21	2	69
Apr 2024	52	18	3	73
May 2024	77	22	7	106
Jun 2024	88	7	3	98
Jul 2024	64	9	2	75
Aug 2024	60	4	3	67
Sep 2024	43	5	0	48
Oct 2024	68	5	3	76
Nov 2024	37	1	2	40
Dec 2024	47	6	4	57
Jan 2025	58	6	6	70
Feb 2025	67	9	0	76
Mar 2025	51	14	1	66
Apr 2025	55	15	2	72
May 2025	81	15	1	97
Jun 2025	91	21	1	113
Jul 2025	59	15	1	75
Aug 2025	92	15	4	111
Sep 2025	123	16	2	141
Oct 2025	55	31	0	86
Nov 2025	15	5	0	20

Cumulative views and downloads (calculated since 21 Feb 2018)

Month	HTML	PDF	XML	Total
Feb 2018	144	46	8	198
Mar 2018	68	16	1	85
Apr 2018	32	17	0	49
May 2018	23	16	1	40
Jun 2018	29	12	1	42
Jul 2018	240	86	5	331
Aug 2018	52	21	0	73
Sep 2018	25	24	1	50
Oct 2018	16	14	0	30
Nov 2018	18	14	1	33
Dec 2018	16	3	0	19
Jan 2019	14	12	0	26
Feb 2019	9	10	0	19
Mar 2019	8	9	0	17
Apr 2019	10	8	0	18
May 2019	31	15	0	46
Jun 2019	20	8	0	28
Jul 2019	16	11	2	29
Aug 2019	6	7	1	14
Sep 2019	12	8	0	20
Oct 2019	32	17	1	50
Nov 2019	12	6	0	18
Dec 2019	17	10	1	28
Jan 2020	20	5	0	25
Feb 2020	14	9	1	24
Mar 2020	7	4	0	11
Apr 2020	12	5	0	17
May 2020	27	6	0	33
Jun 2020	13	8	0	21
Jul 2020	12	12	3	27
Aug 2020	16	80	2	98
Sep 2020	14	45	0	59
Oct 2020	7	9	0	16
Nov 2020	12	10	0	22
Dec 2020	7	3	0	10
Jan 2021	41	9	0	50
Feb 2021	7	12	0	19
Mar 2021	16	8	0	24
Apr 2021	15	5	0	20
May 2021	14	14	2	30
Jun 2021	9	8	0	17
Jul 2021	14	12	0	26
Aug 2021	26	8	1	35
Sep 2021	22	8	0	30
Oct 2021	20	37	0	57
Nov 2021	16	35	1	52
Dec 2021	29	8	0	37
Jan 2022	24	17	5	46
Feb 2022	24	9	4	37
Mar 2022	22	6	0	28
Apr 2022	28	13	3	44
May 2022	22	5	1	28
Jun 2022	28	5	0	33
Jul 2022	45	4	0	49
Aug 2022	87	7	1	95
Sep 2022	32	7	0	39
Oct 2022	6	1	0	7
Nov 2022	33	11	0	44
Dec 2022	38	6	0	44
Jan 2023	43	8	0	51
Feb 2023	33	11	1	45
Mar 2023	46	9	2	57
Apr 2023	32	1	1	34
May 2023	27	11	0	38
Jun 2023	31	8	2	41
Jul 2023	36	7	1	44
Aug 2023	19	7	3	29
Sep 2023	34	6	0	40
Oct 2023	100	12	2	114
Nov 2023	88	4	1	93
Dec 2023	43	15	1	59
Jan 2024	31	10	1	42
Feb 2024	25	12	0	37
Mar 2024	46	21	2	69
Apr 2024	52	18	3	73
May 2024	77	22	7	106
Jun 2024	88	7	3	98
Jul 2024	64	9	2	75
Aug 2024	60	4	3	67
Sep 2024	43	5	0	48
Oct 2024	68	5	3	76
Nov 2024	37	1	2	40
Dec 2024	47	6	4	57
Jan 2025	58	6	6	70
Feb 2025	67	9	0	76
Mar 2025	51	14	1	66
Apr 2025	55	15	2	72
May 2025	81	15	1	97
Jun 2025	91	21	1	113
Jul 2025	59	15	1	75
Aug 2025	92	15	4	111
Sep 2025	123	16	2	141
Oct 2025	55	31	0	86
Nov 2025	15	5	0	20

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Short summary

Using the observational data on ¹³C (CO) and ¹³C (CH₄) from the extra-tropical Southern Hemisphere (ETSH) and EMAC model we (1) provide an independent, observation-based evaluation of Cl atom concentration variations in the ETSH throughout 1994–2000, (2) show that the role of tropospheric Cl as a sink of CH₄ is seriously overestimated in the literature, (3) demonstrate that the ¹³C/¹²C ratio of CO is a sensitive indicator for the isotopic composition of reacted CH₄ and therefore for its sources.


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