Ceilometer inversion method using water-vapor correction from co-located microwave radiometer for aerosol retrievals
International audience Ceilometers are widely spread instruments mainly used for cloud base height determination. However, recent models are more sensitive to aerosols; hence, nowadays there is an increasing interest in these instruments to retrieve aerosol optical and microphysical properties.The h...
Published in: | Atmospheric Research |
---|---|
Main Authors: | , , , , , , , |
Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2021
|
Subjects: | |
Online Access: | https://hal.science/hal-02865809 https://hal.science/hal-02865809v2/document https://hal.science/hal-02865809v2/file/DOTA20096_postprint.pdf https://doi.org/10.1016/j.atmosres.2020.105379 |
id |
ftinsu:oai:HAL:hal-02865809v2 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
Lidar Lidar retrodiffusion Aerosol lidar Retrodiffusion Aérosol lidar [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] |
spellingShingle |
Lidar Lidar retrodiffusion Aerosol lidar Retrodiffusion Aérosol lidar [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] Bedoya-Velásquez, Andres, E. Herreras-Giralda, Marcos Román, Roberto Wiegner, Matthias Lefebvre, Sidonie Toledano, Carlos Huet, Thierry Ceolato, Romain Ceilometer inversion method using water-vapor correction from co-located microwave radiometer for aerosol retrievals |
topic_facet |
Lidar Lidar retrodiffusion Aerosol lidar Retrodiffusion Aérosol lidar [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] |
description |
International audience Ceilometers are widely spread instruments mainly used for cloud base height determination. However, recent models are more sensitive to aerosols; hence, nowadays there is an increasing interest in these instruments to retrieve aerosol optical and microphysical properties.The high number of them distributed around the globe compared to the robust lidar systems and the fact that ceilometers work under unattended conditions are the main reasons behind this interest. In this paper a new methodology is proposed to retrieve aerosol vertical extinction and backscatter profiles from a Vaisala ceilometer CL51. This methodology is based in two parts: first, a signal pre-processing with a suppression of the dark current and background noises, and a correction of the water vapor absorption using near-real time temperature and absolute humidity (AH) profiles from a co-located Microwave radiometer (MWR). Then an iterative Klett-based algorithm that uses AERONET (AErosol RObotic NETwork) AOD (Aerosol Optical Depth) as an input to retrieve the extinction and backscatter profiles. The error analysis of the aerosol retrievals has been performed between MWR measurements and modelled radiosondes from HYSPLIT. The absolute errors found in temperature and AH are leading to errors in the pre-processed RCS signals up to 9%, and then in particle backscatter and particle extinction coefficients up to 2:2% and 25%, respectively. Les ceilomètres sont des instruments très répandus, principalement utilisés pour déterminer la hauteur de la base des nuages. Cependant, des modèles récents sont plus sensibles aux aérosols c'est pourquoi, de nos jours, on s'intéresse de plus en plus à ces instruments pour mesurer des données optiques des aérosols et leurs propriétés microphysiques. Le nombre élevé de ces derniers, répartis dans le monde entier, par rapport aux systèmes lidar robustes et le fait que les plafonds fonctionnent dans des conditions non surveillées sont les principales raisons de cet intérêt. Dans ce ... |
author2 |
ONERA / DOTA, Université de Toulouse Toulouse ONERA-PRES Université de Toulouse Laboratoire d’Optique Atmosphérique - UMR 8518 (LOA) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lille-Centre National de la Recherche Scientifique (CNRS) Universidad de Valladolid Valladolid (UVa) Ludwig Maximilian University Munich = Ludwig Maximilians Universität München (LMU) DOTA, ONERA, Université Paris Saclay Palaiseau ONERA-Université Paris-Saclay |
format |
Article in Journal/Newspaper |
author |
Bedoya-Velásquez, Andres, E. Herreras-Giralda, Marcos Román, Roberto Wiegner, Matthias Lefebvre, Sidonie Toledano, Carlos Huet, Thierry Ceolato, Romain |
author_facet |
Bedoya-Velásquez, Andres, E. Herreras-Giralda, Marcos Román, Roberto Wiegner, Matthias Lefebvre, Sidonie Toledano, Carlos Huet, Thierry Ceolato, Romain |
author_sort |
Bedoya-Velásquez, Andres, E. |
title |
Ceilometer inversion method using water-vapor correction from co-located microwave radiometer for aerosol retrievals |
title_short |
Ceilometer inversion method using water-vapor correction from co-located microwave radiometer for aerosol retrievals |
title_full |
Ceilometer inversion method using water-vapor correction from co-located microwave radiometer for aerosol retrievals |
title_fullStr |
Ceilometer inversion method using water-vapor correction from co-located microwave radiometer for aerosol retrievals |
title_full_unstemmed |
Ceilometer inversion method using water-vapor correction from co-located microwave radiometer for aerosol retrievals |
title_sort |
ceilometer inversion method using water-vapor correction from co-located microwave radiometer for aerosol retrievals |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.science/hal-02865809 https://hal.science/hal-02865809v2/document https://hal.science/hal-02865809v2/file/DOTA20096_postprint.pdf https://doi.org/10.1016/j.atmosres.2020.105379 |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_source |
ISSN: 0169-8095 Atmospheric Research https://hal.science/hal-02865809 Atmospheric Research, 2021, 250, pp.105379. ⟨10.1016/j.atmosres.2020.105379⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.atmosres.2020.105379 hal-02865809 https://hal.science/hal-02865809 https://hal.science/hal-02865809v2/document https://hal.science/hal-02865809v2/file/DOTA20096_postprint.pdf doi:10.1016/j.atmosres.2020.105379 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.atmosres.2020.105379 |
container_title |
Atmospheric Research |
container_volume |
250 |
container_start_page |
105379 |
_version_ |
1790605582881783808 |
spelling |
ftinsu:oai:HAL:hal-02865809v2 2024-02-11T09:54:48+01:00 Ceilometer inversion method using water-vapor correction from co-located microwave radiometer for aerosol retrievals Méthode d'inversion pour ceilomètre basée sur la correction de la vapeur d'eau à partir d'un radiomètre micro-onde Bedoya-Velásquez, Andres, E. Herreras-Giralda, Marcos Román, Roberto Wiegner, Matthias Lefebvre, Sidonie Toledano, Carlos Huet, Thierry Ceolato, Romain ONERA / DOTA, Université de Toulouse Toulouse ONERA-PRES Université de Toulouse Laboratoire d’Optique Atmosphérique - UMR 8518 (LOA) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lille-Centre National de la Recherche Scientifique (CNRS) Universidad de Valladolid Valladolid (UVa) Ludwig Maximilian University Munich = Ludwig Maximilians Universität München (LMU) DOTA, ONERA, Université Paris Saclay Palaiseau ONERA-Université Paris-Saclay 2021-03 https://hal.science/hal-02865809 https://hal.science/hal-02865809v2/document https://hal.science/hal-02865809v2/file/DOTA20096_postprint.pdf https://doi.org/10.1016/j.atmosres.2020.105379 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.atmosres.2020.105379 hal-02865809 https://hal.science/hal-02865809 https://hal.science/hal-02865809v2/document https://hal.science/hal-02865809v2/file/DOTA20096_postprint.pdf doi:10.1016/j.atmosres.2020.105379 info:eu-repo/semantics/OpenAccess ISSN: 0169-8095 Atmospheric Research https://hal.science/hal-02865809 Atmospheric Research, 2021, 250, pp.105379. ⟨10.1016/j.atmosres.2020.105379⟩ Lidar Lidar retrodiffusion Aerosol lidar Retrodiffusion Aérosol lidar [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] info:eu-repo/semantics/article Journal articles 2021 ftinsu https://doi.org/10.1016/j.atmosres.2020.105379 2024-01-24T17:32:27Z International audience Ceilometers are widely spread instruments mainly used for cloud base height determination. However, recent models are more sensitive to aerosols; hence, nowadays there is an increasing interest in these instruments to retrieve aerosol optical and microphysical properties.The high number of them distributed around the globe compared to the robust lidar systems and the fact that ceilometers work under unattended conditions are the main reasons behind this interest. In this paper a new methodology is proposed to retrieve aerosol vertical extinction and backscatter profiles from a Vaisala ceilometer CL51. This methodology is based in two parts: first, a signal pre-processing with a suppression of the dark current and background noises, and a correction of the water vapor absorption using near-real time temperature and absolute humidity (AH) profiles from a co-located Microwave radiometer (MWR). Then an iterative Klett-based algorithm that uses AERONET (AErosol RObotic NETwork) AOD (Aerosol Optical Depth) as an input to retrieve the extinction and backscatter profiles. The error analysis of the aerosol retrievals has been performed between MWR measurements and modelled radiosondes from HYSPLIT. The absolute errors found in temperature and AH are leading to errors in the pre-processed RCS signals up to 9%, and then in particle backscatter and particle extinction coefficients up to 2:2% and 25%, respectively. Les ceilomètres sont des instruments très répandus, principalement utilisés pour déterminer la hauteur de la base des nuages. Cependant, des modèles récents sont plus sensibles aux aérosols c'est pourquoi, de nos jours, on s'intéresse de plus en plus à ces instruments pour mesurer des données optiques des aérosols et leurs propriétés microphysiques. Le nombre élevé de ces derniers, répartis dans le monde entier, par rapport aux systèmes lidar robustes et le fait que les plafonds fonctionnent dans des conditions non surveillées sont les principales raisons de cet intérêt. Dans ce ... Article in Journal/Newspaper Aerosol Robotic Network Institut national des sciences de l'Univers: HAL-INSU Atmospheric Research 250 105379 |