Investigating the frequency and interannual variability in global  above-cloud aerosol characteristics with CALIOP and OMI

Alfaro-Contreras, R.; Zhang, J.; Campbell, J. R.; Reid, J. S.

doi:10.5194/acp-16-47-2016

Articles | Volume 16, issue 1

https://doi.org/10.5194/acp-16-47-2016

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

https://doi.org/10.5194/acp-16-47-2016

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

Articles | Volume 16, issue 1

Research article

|

14 Jan 2016

Research article |

| 14 Jan 2016

Investigating the frequency and interannual variability in global above-cloud aerosol characteristics with CALIOP and OMI

R. Alfaro-Contreras, J. Zhang, J. R. Campbell, and J. S. Reid

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Views and downloads (calculated since 17 Feb 2015)

Month	HTML	PDF	XML	Total
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Aug 2015	11	23	3	37
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Oct 2015	13	4	0	17
Nov 2015	35	15	8	58
Dec 2015	5	6	6	17
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Feb 2016	52	25	3	80
Mar 2016	37	19	2	58
Apr 2016	23	15	0	38
May 2016	28	19	1	48
Jun 2016	10	5	1	16
Jul 2016	16	6	3	25
Aug 2016	15	7	0	22
Sep 2016	16	8	1	25
Oct 2016	19	6	0	25
Nov 2016	14	2	0	16
Dec 2016	9	4	0	13
Jan 2017	25	6	0	31
Feb 2017	39	5	0	44
Mar 2017	38	6	2	46
Apr 2017	33	11	0	44
May 2017	39	17	1	57
Jun 2017	38	7	1	46
Jul 2017	28	13	2	43
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Nov 2019	8	15	0	23
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Aug 2020	10	7	2	19
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May 2022	3	2	0	5
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May 2023	33	8	1	42
Jun 2023	41	1	42
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Oct 2023	38	7	3	48
Nov 2023	24	3	1	28
Dec 2023	41	11	3	55
Jan 2024	37	7	1	45
Feb 2024	37	8	1	46
Mar 2024	42	13	2	57
Apr 2024	32	8	3	43
May 2024	11	19	0	30
Jun 2024	14	9	1	24
Jul 2024	11	6	3	20
Aug 2024	23	7	1	31
Sep 2024	8	4	0	12
Oct 2024	17	5	0	22
Nov 2024	5	5	3	13
Dec 2024	8	5	1	14
Jan 2025	17	4	3	24
Feb 2025	31	12	5	48
Mar 2025	14	13	2	29
Apr 2025	34	9	1	44
May 2025	33	7	2	42
Jun 2025	32	7	6	45
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Aug 2025	34	20	4	58
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Cumulative views and downloads (calculated since 17 Feb 2015)

Month	HTML	PDF	XML	Total
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Mar 2015	49	28	2	79
Apr 2015	48	22	2	72
May 2015	24	11	3	38
Jun 2015	21	7	3	31
Jul 2015	17	10	1	28
Aug 2015	11	23	3	37
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Oct 2015	13	4	0	17
Nov 2015	35	15	8	58
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Jan 2016	152	62	5	219
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Nov 2016	14	2	0	16
Dec 2016	9	4	0	13
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Feb 2017	39	5	0	44
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May 2023	33	8	1	42
Jun 2023	41	1	42
Jul 2023	46	3	1	50
Aug 2023	34	3	1	38
Sep 2023	41	1	1	43
Oct 2023	38	7	3	48
Nov 2023	24	3	1	28
Dec 2023	41	11	3	55
Jan 2024	37	7	1	45
Feb 2024	37	8	1	46
Mar 2024	42	13	2	57
Apr 2024	32	8	3	43
May 2024	11	19	0	30
Jun 2024	14	9	1	24
Jul 2024	11	6	3	20
Aug 2024	23	7	1	31
Sep 2024	8	4	0	12
Oct 2024	17	5	0	22
Nov 2024	5	5	3	13
Dec 2024	8	5	1	14
Jan 2025	17	4	3	24
Feb 2025	31	12	5	48
Mar 2025	14	13	2	29
Apr 2025	34	9	1	44
May 2025	33	7	2	42
Jun 2025	32	7	6	45
Jul 2025	27	16	2	45
Aug 2025	34	20	4	58
Sep 2025	28	15	1	44
Oct 2025	23	38	0	61
Nov 2025	7	4	0	11

Latest update: 08 Nov 2025

Short summary

The spatial distributions and trends of above-cloud aerosol (ACA) events are studied using seven and a half years of MODIS, OMI, and CALIOP data. The active- (CALIOP) and passive-based (MODIS-OMI) methods have their advantages and caveats, and thus both are used to get a thorough and robust comparison of ACA distribution and climatology. For the first time, baseline above-cloud CALIOP aerosol optical depth and OMI aerosol index thresholds are derived and examined for each sensor.