Interpreting the ultraviolet aerosol index observed with the OMI satellite  instrument to understand absorption by organic aerosols: implications for  atmospheric oxidation and direct radiative effects

Hammer, Melanie S.; Martin, Randall V.; van Donkelaar, Aaron; Buchard, Virginie; Torres, Omar; Ridley, David A.; Spurr, Robert J. D.

doi:10.5194/acp-16-2507-2016

Articles | Volume 16, issue 4

https://doi.org/10.5194/acp-16-2507-2016

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

https://doi.org/10.5194/acp-16-2507-2016

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

Articles | Volume 16, issue 4

Research article

|

01 Mar 2016

Research article |

| 01 Mar 2016

Interpreting the ultraviolet aerosol index observed with the OMI satellite instrument to understand absorption by organic aerosols: implications for atmospheric oxidation and direct radiative effects

Melanie S. Hammer, Randall V. Martin, Aaron van Donkelaar, Virginie Buchard, Omar Torres, David A. Ridley, and Robert J. D. Spurr

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Month	HTML	PDF	XML	Total
Oct 2015	138	129	15	282
Nov 2015	42	31	7	80
Dec 2015	34	25	6	65
Jan 2016	56	22	2	80
Feb 2016	59	21	1	81
Mar 2016	174	127	1	302
Apr 2016	30	50	2	82
May 2016	28	21	0	49
Jun 2016	25	15	3	43
Jul 2016	18	11	4	33
Aug 2016	18	29	2	49
Sep 2016	21	22	1	44
Oct 2016	29	21	0	50
Nov 2016	15	31	1	47
Dec 2016	10	27	0	37
Jan 2017	26	40	0	66
Feb 2017	13	23	1	37
Mar 2017	33	55	1	89
Apr 2017	33	61	0	94
May 2017	36	25	1	62
Jun 2017	35	28	1	64
Jul 2017	30	33	0	63
Aug 2017	15	22	2	39
Sep 2017	25	24	0	49
Oct 2017	22	26	1	49
Nov 2017	19	32	0	51
Dec 2017	23	36	0	59
Jan 2018	26	23	1	50
Feb 2018	30	30	3	63
Mar 2018	29	26	0	55
Apr 2018	33	30	0	63
May 2018	20	34	0	54
Jun 2018	10	27	1	38
Jul 2018	19	22	0	41
Aug 2018	21	20	0	41
Sep 2018	13	16	1	30
Oct 2018	19	32	1	52
Nov 2018	14	21	1	36
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Feb 2019	17	7	1	25
Mar 2019	9	13	1	23
Apr 2019	12	15	2	29
May 2019	12	14	0	26
Jun 2019	9	15	0	24
Jul 2019	14	24	0	38
Aug 2019	11	18	0	29
Sep 2019	8	30	3	41
Oct 2019	11	17	2	30
Nov 2019	10	19	3	32
Dec 2019	7	14	3	24
Jan 2020	8	19	0	27
Feb 2020	17	23	0	40
Mar 2020	11	25	2	38
Apr 2020	11	27	2	40
May 2020	9	23	7	39
Jun 2020	26	9	6	41
Jul 2020	27	19	16	62
Aug 2020	22	20	7	49
Sep 2020	17	12	4	33
Oct 2020	4	24	2	30
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Jan 2021	20	13	2	35
Feb 2021	19	19	3	41
Mar 2021	10	19	9	38
Apr 2021	14	15	4	33
May 2021	19	22	8	49
Jun 2021	19	24	7	50
Jul 2021	23	31	6	60
Aug 2021	14	24	4	42
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Nov 2021	23	49	8	80
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Jan 2022	16	18	0	34
Feb 2022	20	20	1	41
Mar 2022	22	29	7	58
Apr 2022	12	21	5	38
May 2022	11	23	5	39
Jun 2022	27	29	6	62
Jul 2022	19	20	3	42
Aug 2022	21	33	5	59
Sep 2022	15	17	3	35
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Nov 2022	14	20	1	35
Dec 2022	15	9	0	24
Jan 2023	26	22	1	49
Feb 2023	28	20	0	48
Mar 2023	47	30	3	80
Apr 2023	60	16	0	76
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Jun 2023	80	30	4	114
Jul 2023	49	19	4	72
Aug 2023	60	23	2	85
Sep 2023	50	18	1	69
Oct 2023	52	18	1	71
Nov 2023	41	13	0	54
Dec 2023	70	11	4	85
Jan 2024	55	28	3	86
Feb 2024	42	17	0	59
Mar 2024	53	31	3	87
Apr 2024	71	36	3	110
May 2024	32	30	7	69
Jun 2024	35	13	1	49
Jul 2024	33	20	3	56
Aug 2024	32	16	2	50
Sep 2024	17	31	0	48
Oct 2024	34	25	0	59
Nov 2024	32	27	5	64
Dec 2024	22	28	1	51
Jan 2025	28	16	4	48
Feb 2025	43	14	5	62
Mar 2025	27	17	0	44
Apr 2025	40	23	0	63
May 2025	41	15	0	56
Jun 2025	64	18	7	89
Jul 2025	39	24	0	63
Aug 2025	78	27	3	108
Sep 2025	64	11	2	77
Oct 2025	31	29	0	60
Nov 2025	23	17	0	40

Cumulative views and downloads (calculated since 12 Oct 2015)

Month	HTML	PDF	XML	Total
Oct 2015	138	129	15	282
Nov 2015	42	31	7	80
Dec 2015	34	25	6	65
Jan 2016	56	22	2	80
Feb 2016	59	21	1	81
Mar 2016	174	127	1	302
Apr 2016	30	50	2	82
May 2016	28	21	0	49
Jun 2016	25	15	3	43
Jul 2016	18	11	4	33
Aug 2016	18	29	2	49
Sep 2016	21	22	1	44
Oct 2016	29	21	0	50
Nov 2016	15	31	1	47
Dec 2016	10	27	0	37
Jan 2017	26	40	0	66
Feb 2017	13	23	1	37
Mar 2017	33	55	1	89
Apr 2017	33	61	0	94
May 2017	36	25	1	62
Jun 2017	35	28	1	64
Jul 2017	30	33	0	63
Aug 2017	15	22	2	39
Sep 2017	25	24	0	49
Oct 2017	22	26	1	49
Nov 2017	19	32	0	51
Dec 2017	23	36	0	59
Jan 2018	26	23	1	50
Feb 2018	30	30	3	63
Mar 2018	29	26	0	55
Apr 2018	33	30	0	63
May 2018	20	34	0	54
Jun 2018	10	27	1	38
Jul 2018	19	22	0	41
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Sep 2018	13	16	1	30
Oct 2018	19	32	1	52
Nov 2018	14	21	1	36
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Feb 2019	17	7	1	25
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May 2019	12	14	0	26
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Jul 2019	14	24	0	38
Aug 2019	11	18	0	29
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Jan 2020	8	19	0	27
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Mar 2020	11	25	2	38
Apr 2020	11	27	2	40
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Jun 2020	26	9	6	41
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Sep 2020	17	12	4	33
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Feb 2021	19	19	3	41
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Apr 2021	14	15	4	33
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Jun 2021	19	24	7	50
Jul 2021	23	31	6	60
Aug 2021	14	24	4	42
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Oct 2021	15	46	6	67
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Jan 2022	16	18	0	34
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Mar 2022	22	29	7	58
Apr 2022	12	21	5	38
May 2022	11	23	5	39
Jun 2022	27	29	6	62
Jul 2022	19	20	3	42
Aug 2022	21	33	5	59
Sep 2022	15	17	3	35
Oct 2022	17	15	8	40
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Dec 2022	15	9	0	24
Jan 2023	26	22	1	49
Feb 2023	28	20	0	48
Mar 2023	47	30	3	80
Apr 2023	60	16	0	76
May 2023	105	20	0	125
Jun 2023	80	30	4	114
Jul 2023	49	19	4	72
Aug 2023	60	23	2	85
Sep 2023	50	18	1	69
Oct 2023	52	18	1	71
Nov 2023	41	13	0	54
Dec 2023	70	11	4	85
Jan 2024	55	28	3	86
Feb 2024	42	17	0	59
Mar 2024	53	31	3	87
Apr 2024	71	36	3	110
May 2024	32	30	7	69
Jun 2024	35	13	1	49
Jul 2024	33	20	3	56
Aug 2024	32	16	2	50
Sep 2024	17	31	0	48
Oct 2024	34	25	0	59
Nov 2024	32	27	5	64
Dec 2024	22	28	1	51
Jan 2025	28	16	4	48
Feb 2025	43	14	5	62
Mar 2025	27	17	0	44
Apr 2025	40	23	0	63
May 2025	41	15	0	56
Jun 2025	64	18	7	89
Jul 2025	39	24	0	63
Aug 2025	78	27	3	108
Sep 2025	64	11	2	77
Oct 2025	31	29	0	60
Nov 2025	23	17	0	40

Latest update: 18 Nov 2025

Short summary

We interpret satellite observations to infer the global absorption properties of brown carbon (BrC) aerosols. We incorporate these BrC absorption properties into a chemical transport model to estimate global direct radiative effects and changes in hydroxyl radical (OH) concentrations. To our knowledge, this is the first time the effect of BrC absorption on atmospheric photochemistry has been considered in a global chemical transport model.