On the spectral depolarisation and lidar ratio of mineral dust provided in the AERONET version 3 inversion product
Knowledge of the particle lidar ratio (Sλ) and the particle linear depolarisation ratio (δλ) for different aerosol types allows for aerosol typing and aerosol-type separation in lidar measurements. Reference values generally originate from dedicated lidar observations but might also be obtained from...
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Copernicus Publications
2018
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00041519 2023-05-15T13:07:01+02:00 On the spectral depolarisation and lidar ratio of mineral dust provided in the AERONET version 3 inversion product Shin, Sung-Kyun Tesche, Matthias Kim, Kwanchul Kezoudi, Maria Tatarov, Boyan Müller, Detlef Noh, Youngmin 2018-09 electronic https://doi.org/10.5194/acp-18-12735-2018 https://noa.gwlb.de/receive/cop_mods_00041519 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00041139/acp-18-12735-2018.pdf https://acp.copernicus.org/articles/18/12735/2018/acp-18-12735-2018.pdf eng eng Copernicus Publications Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-18-12735-2018 https://noa.gwlb.de/receive/cop_mods_00041519 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00041139/acp-18-12735-2018.pdf https://acp.copernicus.org/articles/18/12735/2018/acp-18-12735-2018.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2018 ftnonlinearchiv https://doi.org/10.5194/acp-18-12735-2018 2022-02-08T22:41:32Z Knowledge of the particle lidar ratio (Sλ) and the particle linear depolarisation ratio (δλ) for different aerosol types allows for aerosol typing and aerosol-type separation in lidar measurements. Reference values generally originate from dedicated lidar observations but might also be obtained from the inversion of AErosol RObotic NETwork (AERONET) sun/sky radiometer measurements. This study investigates the consistency of spectral Sλ and δλ provided in the recently released AERONET version 3 inversion product for observations of undiluted mineral dust in the vicinity of the following major deserts: Gobi, Sahara, Arabian, Great Basin, and Great Victoria. Pure dust conditions are identified by an Ångström exponent <0.4 and a fine-mode fraction <0.1. The values of spectral Sλ are found to vary for the different source regions but generally show an increase with decreasing wavelength. The feature correlates to AERONET, retrieving an increase in the imaginary part of the refractive index with decreasing wavelength. The smallest values of Sλ=35–45 sr are found for mineral dust from the Great Basin desert, while the highest values of 50–70 sr have been inferred from AERONET observations of Saharan dust. Values of Sλ at 675, 870, and 1020 nm seem to be in reasonable agreement with available lidar observations, while those at 440 nm are up to 10 sr higher than the lidar reference. The spectrum of δλ shows a maximum of 0.26–0.31 at 1020 nm and decreasing values as wavelength decreases. AERONET-derived δλ values at 870 and 1020 nm are in line with the lidar reference, while values of 0.19–0.24 at 440 nm are smaller than the independent lidar observations by a difference of 0.03 to 0.08. This general behaviour is consistent with earlier studies based on AERONET version 2 products. Article in Journal/Newspaper Aerosol Robotic Network Niedersächsisches Online-Archiv NOA Atmospheric Chemistry and Physics 18 17 12735 12746 |
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article Verlagsveröffentlichung Shin, Sung-Kyun Tesche, Matthias Kim, Kwanchul Kezoudi, Maria Tatarov, Boyan Müller, Detlef Noh, Youngmin On the spectral depolarisation and lidar ratio of mineral dust provided in the AERONET version 3 inversion product |
topic_facet |
article Verlagsveröffentlichung |
description |
Knowledge of the particle lidar ratio (Sλ) and the particle linear depolarisation ratio (δλ) for different aerosol types allows for aerosol typing and aerosol-type separation in lidar measurements. Reference values generally originate from dedicated lidar observations but might also be obtained from the inversion of AErosol RObotic NETwork (AERONET) sun/sky radiometer measurements. This study investigates the consistency of spectral Sλ and δλ provided in the recently released AERONET version 3 inversion product for observations of undiluted mineral dust in the vicinity of the following major deserts: Gobi, Sahara, Arabian, Great Basin, and Great Victoria. Pure dust conditions are identified by an Ångström exponent <0.4 and a fine-mode fraction <0.1. The values of spectral Sλ are found to vary for the different source regions but generally show an increase with decreasing wavelength. The feature correlates to AERONET, retrieving an increase in the imaginary part of the refractive index with decreasing wavelength. The smallest values of Sλ=35–45 sr are found for mineral dust from the Great Basin desert, while the highest values of 50–70 sr have been inferred from AERONET observations of Saharan dust. Values of Sλ at 675, 870, and 1020 nm seem to be in reasonable agreement with available lidar observations, while those at 440 nm are up to 10 sr higher than the lidar reference. The spectrum of δλ shows a maximum of 0.26–0.31 at 1020 nm and decreasing values as wavelength decreases. AERONET-derived δλ values at 870 and 1020 nm are in line with the lidar reference, while values of 0.19–0.24 at 440 nm are smaller than the independent lidar observations by a difference of 0.03 to 0.08. This general behaviour is consistent with earlier studies based on AERONET version 2 products. |
format |
Article in Journal/Newspaper |
author |
Shin, Sung-Kyun Tesche, Matthias Kim, Kwanchul Kezoudi, Maria Tatarov, Boyan Müller, Detlef Noh, Youngmin |
author_facet |
Shin, Sung-Kyun Tesche, Matthias Kim, Kwanchul Kezoudi, Maria Tatarov, Boyan Müller, Detlef Noh, Youngmin |
author_sort |
Shin, Sung-Kyun |
title |
On the spectral depolarisation and lidar ratio of mineral dust provided in the AERONET version 3 inversion product |
title_short |
On the spectral depolarisation and lidar ratio of mineral dust provided in the AERONET version 3 inversion product |
title_full |
On the spectral depolarisation and lidar ratio of mineral dust provided in the AERONET version 3 inversion product |
title_fullStr |
On the spectral depolarisation and lidar ratio of mineral dust provided in the AERONET version 3 inversion product |
title_full_unstemmed |
On the spectral depolarisation and lidar ratio of mineral dust provided in the AERONET version 3 inversion product |
title_sort |
on the spectral depolarisation and lidar ratio of mineral dust provided in the aeronet version 3 inversion product |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/acp-18-12735-2018 https://noa.gwlb.de/receive/cop_mods_00041519 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00041139/acp-18-12735-2018.pdf https://acp.copernicus.org/articles/18/12735/2018/acp-18-12735-2018.pdf |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_relation |
Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-18-12735-2018 https://noa.gwlb.de/receive/cop_mods_00041519 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00041139/acp-18-12735-2018.pdf https://acp.copernicus.org/articles/18/12735/2018/acp-18-12735-2018.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/acp-18-12735-2018 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
18 |
container_issue |
17 |
container_start_page |
12735 |
op_container_end_page |
12746 |
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1766031513441271808 |