Distinguishing cirrus cloud presence in autonomous lidar measurements

Campbell, J. R.; Vaughan, M. A.; Oo, M.; Holz, R. E.; Lewis, J. R.; Welton, E. J.

doi:10.5194/amt-8-435-2015

Articles | Volume 8, issue 1

https://doi.org/10.5194/amt-8-435-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/amt-8-435-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 8, issue 1

Research article

|

27 Jan 2015

Research article |

| 27 Jan 2015

Distinguishing cirrus cloud presence in autonomous lidar measurements

J. R. Campbell, M. A. Vaughan, M. Oo, R. E. Holz, J. R. Lewis, and E. J. Welton

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Jul 2024	21	10	3	34
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Dec 2024	9	4	1	14
Jan 2025	13	7	2	22
Feb 2025	16	4	1	21
Mar 2025	19	8	0	27
Apr 2025	19	11	1	31
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Jun 2025	55	6	1	62
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Cumulative views and downloads (calculated since 17 Jul 2014)

Month	HTML	PDF	XML	Total
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Aug 2014	21	22	0	43
Sep 2014	5	12	1	18
Oct 2014	5	11	0	16
Nov 2014	4	10	0	14
Dec 2014	18	20	1	39
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Feb 2015	32	38	2	72
Mar 2015	20	24	2	46
Apr 2015	24	17	3	44
May 2015	10	14	2	26
Jun 2015	24	14	0	38
Jul 2015	28	14	0	42
Aug 2015	8	14	0	22
Sep 2015	6	18	0	24
Oct 2015	19	28	1	48
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Apr 2016	6	16	0	22
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Latest update: 19 Nov 2025

Short summary

Digital thresholds based on 2012 CALIOP satellite lidar measurements are investigated for distinguishing cirrus cloud presence, including cloud top temperatures and heights combined with layer depolarization and phase and optical depths. A cloud top temperature of -37 C is found to exhibit the most stable performance, owing to it being the point of homogeneous liquid-water freezing. Depolarization and phase help but are mostly ambiguous at warmer temperatures where mixed-phase clouds propagate.