First triple-wavelength lidar observations of depolarization and extinction-to-backscatter ratios of Saharan dus
Two layers of Saharan dust observed over Leipzig, Germany, in February and March 2021 were used to provide the first-ever lidar measurements of the dust lidar ratio (extinction-to-backscatter ratio) and linear depolarization ratio at all three classical lidar wavelengths (355, 532 and 1064gnm). The...
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2022
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ftleibnizopen:oai:oai.leibnizopen.de:dIf6pIkBdbrxVwz6Bcc2 2023-08-20T03:59:12+02:00 First triple-wavelength lidar observations of depolarization and extinction-to-backscatter ratios of Saharan dus Haarig, Moritz Ansmann, Albert Engelmann, Ronny Baars, Holger Toledano, Carlos Torres, Benjamin Althausen, Dietrich Radenz, Martin Wandinger, Ulla 2022 application/pdf https://oa.tib.eu/renate/handle/123456789/11868 https://doi.org/10.34657/10901 eng eng Katlenburg-Lindau : EGU CC BY 4.0 Unported https://creativecommons.org/licenses/by/4.0 Atmospheric chemistry and physics 22 (2022), Nr. 1 Germany Leipzig Saxony AERONET aerosol 550 article Text 2022 ftleibnizopen https://doi.org/10.34657/10901 2023-07-30T23:42:21Z Two layers of Saharan dust observed over Leipzig, Germany, in February and March 2021 were used to provide the first-ever lidar measurements of the dust lidar ratio (extinction-to-backscatter ratio) and linear depolarization ratio at all three classical lidar wavelengths (355, 532 and 1064gnm). The pure-dust conditions during the first event exhibit lidar ratios of 47g±g8, 50g±g5 and 69g±g14gsr and particle linear depolarization ratios of 0.242g±g0.024, 0.299g±g0.018 and 0.206g±g0.010 at wavelengths of 355, 532 and 1064gnm, respectively. The second, slightly polluted-dust case shows a similar spectral behavior of the lidar and depolarization ratio with values of the lidar ratio of 49g±g4, 46g±g5 and 57g±g9gsr and the depolarization ratio of 0.174g±g0.041, 0.298g±g0.016 and 0.242g±g0.007 at 355, 532 and 1064gnm, respectively. The results were compared with Aerosol Robotic Network (AERONET) version 3 (v3) inversion solutions and the Generalized Retrieval of Aerosol and Surface Properties (GRASP) at six and seven wavelengths. Both retrieval schemes make use of a spheroid shape model for mineral dust. The spectral slope of the lidar ratio from 532 to 1064gnm could be well reproduced by the AERONET and GRASP retrieval schemes. Higher lidar ratios in the UV were retrieved by AERONET and GRASP. The enhancement was probably caused by the influence of fine-mode pollution particles in the boundary layer which are included in the columnar photometer measurements. Significant differences between the measured and retrieved wavelength dependence of the particle linear depolarization ratio were found. The potential sources for these uncertainties are discussed. Leibniz_Fonds publishedVersion Article in Journal/Newspaper Aerosol Robotic Network LeibnizOpen (The Leibniz Association) |
institution |
Open Polar |
collection |
LeibnizOpen (The Leibniz Association) |
op_collection_id |
ftleibnizopen |
language |
English |
topic |
Germany Leipzig Saxony AERONET aerosol 550 |
spellingShingle |
Germany Leipzig Saxony AERONET aerosol 550 Haarig, Moritz Ansmann, Albert Engelmann, Ronny Baars, Holger Toledano, Carlos Torres, Benjamin Althausen, Dietrich Radenz, Martin Wandinger, Ulla First triple-wavelength lidar observations of depolarization and extinction-to-backscatter ratios of Saharan dus |
topic_facet |
Germany Leipzig Saxony AERONET aerosol 550 |
description |
Two layers of Saharan dust observed over Leipzig, Germany, in February and March 2021 were used to provide the first-ever lidar measurements of the dust lidar ratio (extinction-to-backscatter ratio) and linear depolarization ratio at all three classical lidar wavelengths (355, 532 and 1064gnm). The pure-dust conditions during the first event exhibit lidar ratios of 47g±g8, 50g±g5 and 69g±g14gsr and particle linear depolarization ratios of 0.242g±g0.024, 0.299g±g0.018 and 0.206g±g0.010 at wavelengths of 355, 532 and 1064gnm, respectively. The second, slightly polluted-dust case shows a similar spectral behavior of the lidar and depolarization ratio with values of the lidar ratio of 49g±g4, 46g±g5 and 57g±g9gsr and the depolarization ratio of 0.174g±g0.041, 0.298g±g0.016 and 0.242g±g0.007 at 355, 532 and 1064gnm, respectively. The results were compared with Aerosol Robotic Network (AERONET) version 3 (v3) inversion solutions and the Generalized Retrieval of Aerosol and Surface Properties (GRASP) at six and seven wavelengths. Both retrieval schemes make use of a spheroid shape model for mineral dust. The spectral slope of the lidar ratio from 532 to 1064gnm could be well reproduced by the AERONET and GRASP retrieval schemes. Higher lidar ratios in the UV were retrieved by AERONET and GRASP. The enhancement was probably caused by the influence of fine-mode pollution particles in the boundary layer which are included in the columnar photometer measurements. Significant differences between the measured and retrieved wavelength dependence of the particle linear depolarization ratio were found. The potential sources for these uncertainties are discussed. Leibniz_Fonds publishedVersion |
format |
Article in Journal/Newspaper |
author |
Haarig, Moritz Ansmann, Albert Engelmann, Ronny Baars, Holger Toledano, Carlos Torres, Benjamin Althausen, Dietrich Radenz, Martin Wandinger, Ulla |
author_facet |
Haarig, Moritz Ansmann, Albert Engelmann, Ronny Baars, Holger Toledano, Carlos Torres, Benjamin Althausen, Dietrich Radenz, Martin Wandinger, Ulla |
author_sort |
Haarig, Moritz |
title |
First triple-wavelength lidar observations of depolarization and extinction-to-backscatter ratios of Saharan dus |
title_short |
First triple-wavelength lidar observations of depolarization and extinction-to-backscatter ratios of Saharan dus |
title_full |
First triple-wavelength lidar observations of depolarization and extinction-to-backscatter ratios of Saharan dus |
title_fullStr |
First triple-wavelength lidar observations of depolarization and extinction-to-backscatter ratios of Saharan dus |
title_full_unstemmed |
First triple-wavelength lidar observations of depolarization and extinction-to-backscatter ratios of Saharan dus |
title_sort |
first triple-wavelength lidar observations of depolarization and extinction-to-backscatter ratios of saharan dus |
publisher |
Katlenburg-Lindau : EGU |
publishDate |
2022 |
url |
https://oa.tib.eu/renate/handle/123456789/11868 https://doi.org/10.34657/10901 |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_source |
Atmospheric chemistry and physics 22 (2022), Nr. 1 |
op_rights |
CC BY 4.0 Unported https://creativecommons.org/licenses/by/4.0 |
op_doi |
https://doi.org/10.34657/10901 |
_version_ |
1774720470023667712 |