Trends in peroxyacetyl nitrate (PAN) in the upper troposphere and lower stratosphere over southern Asia during the summer monsoon season: regional impacts

Fadnavis, S.; Schultz, M. G.; Semeniuk, K.; Mahajan, A. S.; Pozzoli, L.; Sonbawne, S.; Ghude, S. D.; Kiefer, M.; Eckert, E.

doi:10.5194/acp-14-12725-2014

Articles | Volume 14, issue 23

https://doi.org/10.5194/acp-14-12725-2014

© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/acp-14-12725-2014

© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 14, issue 23

Research article

|

04 Dec 2014

Research article |

| 04 Dec 2014

Trends in peroxyacetyl nitrate (PAN) in the upper troposphere and lower stratosphere over southern Asia during the summer monsoon season: regional impacts

S. Fadnavis, M. G. Schultz, K. Semeniuk, A. S. Mahajan, L. Pozzoli, S. Sonbawne, S. D. Ghude, M. Kiefer, and E. Eckert

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Views and downloads (calculated since 22 Jul 2014)

Month	HTML	PDF	XML	Total
Jul 2014	82	57	3	142
Aug 2014	35	32	5	72
Sep 2014	32	26	3	61
Oct 2014	21	12	0	33
Nov 2014	21	16	1	38
Dec 2014	196	110	3	309
Jan 2015	35	36	0	71
Feb 2015	19	14	0	33
Mar 2015	21	10	3	34
Apr 2015	22	12	4	38
May 2015	12	16	2	30
Jun 2015	38	9	3	50
Jul 2015	34	13	2	49
Aug 2015	11	8	2	21
Sep 2015	14	17	1	32
Oct 2015	30	17	1	48
Nov 2015	31	15	6	52
Dec 2015	13	13	29	55
Jan 2016	43	16	28	87
Feb 2016	31	17	32	80
Mar 2016	20	23	28	71
Apr 2016	6	9	13	28
May 2016	11	9	20	40
Jun 2016	9	2	6	17
Jul 2016	13	5	5	23
Aug 2016	9	5	16	30
Sep 2016	13	1	12	26
Oct 2016	12	3	2	17
Nov 2016	8	1	0	9
Dec 2016	3	4	1	8
Jan 2017	15	1	16
Feb 2017	10	7	0	17
Mar 2017	21	8	2	31
Apr 2017	29	13	0	42
May 2017	17	5	0	22
Jun 2017	22	9	2	33
Jul 2017	16	19	0	35
Aug 2017	6	14	0	20
Sep 2017	12	15	1	28
Oct 2017	6	20	0	26
Nov 2017	14	17	2	33
Dec 2017	5	7	1	13
Jan 2018	6	12	0	18
Feb 2018	8	16	1	25
Mar 2018	11	23	2	36
Apr 2018	10	23	2	35
May 2018	9	23	1	33
Jun 2018	7	27	1	35
Jul 2018	5	21	1	27
Aug 2018	14	23	1	38
Sep 2018	17	20	0	37
Oct 2018	31	30	3	64
Nov 2018	23	35	6	64
Dec 2018	10	17	3	30
Jan 2019	3	12	4	19
Feb 2019	6	12	1	19
Mar 2019	7	8	1	16
Apr 2019	7	13	0	20
May 2019	8	18	0	26
Jun 2019	7	17	1	25
Jul 2019	4	15	2	21
Aug 2019	4	16	6	26
Sep 2019	2	10	5	17
Oct 2019	5	12	11	28
Nov 2019	7	13	0	20
Dec 2019	6	7	0	13
Jan 2020	10	4	0	14
Feb 2020	3	3	0	6
Mar 2020	4	4	0	8
Apr 2020	6	2	2	10
May 2020	8	4	4	16
Jun 2020	19	4	2	25
Jul 2020	18	13	5	36
Aug 2020	13	11	17	41
Sep 2020	11	6	3	20
Oct 2020	7	4	0	11
Nov 2020	11	6	2	19
Dec 2020	14	7	4	25
Jan 2021	10	10	3	23
Feb 2021	9	9	2	20
Mar 2021	9	3	3	15
Apr 2021	5	8	4	17
May 2021	11	7	10	28
Jun 2021	9	6	2	17
Jul 2021	11	8	2	21
Aug 2021	4	4	1	9
Sep 2021	15	9	1	25
Oct 2021	6	32	1	39
Nov 2021	12	26	0	38
Dec 2021	10	7	4	21
Jan 2022	16	11	5	32
Feb 2022	7	7	3	17
Mar 2022	9	8	1	18
Apr 2022	5	5	1	11
May 2022	2	3	1	6
Jun 2022	4	4	2	10
Jul 2022	2	2	1	5
Aug 2022	14	7	6	27
Sep 2022	5	2	1	8
Oct 2022	6	3	4	13
Nov 2022	14	5	2	21
Dec 2022	8	5	0	13
Jan 2023	13	10	0	23
Feb 2023	10	15	0	25
Mar 2023	13	11	1	25
Apr 2023	11	10	1	22
May 2023	31	11	0	42
Jun 2023	38	6	1	45
Jul 2023	39	8	1	48
Aug 2023	40	13	4	57
Sep 2023	37	6	0	43
Oct 2023	42	8	2	52
Nov 2023	34	6	3	43
Dec 2023	47	14	6	67
Jan 2024	37	4	0	41
Feb 2024	41	5	3	49
Mar 2024	47	21	5	73
Apr 2024	43	11	4	58
May 2024	18	7	4	29
Jun 2024	15	7	1	23
Jul 2024	19	8	1	28
Aug 2024	26	6	2	34
Sep 2024	15	9	0	24
Oct 2024	29	5	0	34
Nov 2024	33	5	2	40
Dec 2024	18	14	4	36
Jan 2025	31	11	6	48
Feb 2025	49	8	3	60
Mar 2025	19	10	0	29
Apr 2025	27	15	1	43
May 2025	30	11	0	41
Jun 2025	41	14	1	56
Jul 2025	43	21	4	68
Aug 2025	53	10	2	65
Sep 2025	79	22	2	103
Oct 2025	24	24	0	48
Nov 2025	15	15	4	34

Cumulative views and downloads (calculated since 22 Jul 2014)

Month	HTML	PDF	XML	Total
Jul 2014	82	57	3	142
Aug 2014	35	32	5	72
Sep 2014	32	26	3	61
Oct 2014	21	12	0	33
Nov 2014	21	16	1	38
Dec 2014	196	110	3	309
Jan 2015	35	36	0	71
Feb 2015	19	14	0	33
Mar 2015	21	10	3	34
Apr 2015	22	12	4	38
May 2015	12	16	2	30
Jun 2015	38	9	3	50
Jul 2015	34	13	2	49
Aug 2015	11	8	2	21
Sep 2015	14	17	1	32
Oct 2015	30	17	1	48
Nov 2015	31	15	6	52
Dec 2015	13	13	29	55
Jan 2016	43	16	28	87
Feb 2016	31	17	32	80
Mar 2016	20	23	28	71
Apr 2016	6	9	13	28
May 2016	11	9	20	40
Jun 2016	9	2	6	17
Jul 2016	13	5	5	23
Aug 2016	9	5	16	30
Sep 2016	13	1	12	26
Oct 2016	12	3	2	17
Nov 2016	8	1	0	9
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Jan 2017	15	1	16
Feb 2017	10	7	0	17
Mar 2017	21	8	2	31
Apr 2017	29	13	0	42
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Jun 2017	22	9	2	33
Jul 2017	16	19	0	35
Aug 2017	6	14	0	20
Sep 2017	12	15	1	28
Oct 2017	6	20	0	26
Nov 2017	14	17	2	33
Dec 2017	5	7	1	13
Jan 2018	6	12	0	18
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Apr 2018	10	23	2	35
May 2018	9	23	1	33
Jun 2018	7	27	1	35
Jul 2018	5	21	1	27
Aug 2018	14	23	1	38
Sep 2018	17	20	0	37
Oct 2018	31	30	3	64
Nov 2018	23	35	6	64
Dec 2018	10	17	3	30
Jan 2019	3	12	4	19
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Jun 2019	7	17	1	25
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May 2020	8	4	4	16
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Apr 2021	5	8	4	17
May 2021	11	7	10	28
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Jan 2022	16	11	5	32
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Apr 2022	5	5	1	11
May 2022	2	3	1	6
Jun 2022	4	4	2	10
Jul 2022	2	2	1	5
Aug 2022	14	7	6	27
Sep 2022	5	2	1	8
Oct 2022	6	3	4	13
Nov 2022	14	5	2	21
Dec 2022	8	5	0	13
Jan 2023	13	10	0	23
Feb 2023	10	15	0	25
Mar 2023	13	11	1	25
Apr 2023	11	10	1	22
May 2023	31	11	0	42
Jun 2023	38	6	1	45
Jul 2023	39	8	1	48
Aug 2023	40	13	4	57
Sep 2023	37	6	0	43
Oct 2023	42	8	2	52
Nov 2023	34	6	3	43
Dec 2023	47	14	6	67
Jan 2024	37	4	0	41
Feb 2024	41	5	3	49
Mar 2024	47	21	5	73
Apr 2024	43	11	4	58
May 2024	18	7	4	29
Jun 2024	15	7	1	23
Jul 2024	19	8	1	28
Aug 2024	26	6	2	34
Sep 2024	15	9	0	24
Oct 2024	29	5	0	34
Nov 2024	33	5	2	40
Dec 2024	18	14	4	36
Jan 2025	31	11	6	48
Feb 2025	49	8	3	60
Mar 2025	19	10	0	29
Apr 2025	27	15	1	43
May 2025	30	11	0	41
Jun 2025	41	14	1	56
Jul 2025	43	21	4	68
Aug 2025	53	10	2	65
Sep 2025	79	22	2	103
Oct 2025	24	24	0	48
Nov 2025	15	15	4	34

Latest update: 25 Nov 2025

Short summary

The Asian summer monsoon transports pollutants from local emission sources to the upper troposphere and lower stratosphere (UTLS). The increasing trend of these pollutants may have climatic impact. This study addresses the impact of convectively lifted Indian and Chinese emissions on the ULTS. Sensitivity experiments with emission changes in particular regions show that Chinese emissions have a greater impact on the concentrations of NOY species than Indian emissions.