Assessment of nocturnal aerosol optical depth from lunar photometry at the Izaña high mountain observatory
International audience This work is a first approach to correct the systematic errors observed in the aerosol optical depth (AOD) retrieved at nighttime using lunar photometry and calibration techniques dependent on the lunar irradiance model. To this end, nocturnal AOD measurements were performed i...
Published in: | Atmospheric Measurement Techniques |
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ftinsu:oai:HAL:insu-03686237v1 2024-02-11T09:54:47+01:00 Assessment of nocturnal aerosol optical depth from lunar photometry at the Izaña high mountain observatory Barreto, África Román, Roberto Cuevas, Emilio Berjón, Alberto J. Almansa, A. Fernando Toledano, Carlos González, Ramiro Hernández, Yballa Blarel, Luc Goloub, Philippe Guirado, Carmen Yela, Margarita 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) 2017 https://insu.hal.science/insu-03686237 https://insu.hal.science/insu-03686237/document https://insu.hal.science/insu-03686237/file/amt-10-3007-2017.pdf https://doi.org/10.5194/amt-10-3007-2017 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/amt-10-3007-2017 insu-03686237 https://insu.hal.science/insu-03686237 https://insu.hal.science/insu-03686237/document https://insu.hal.science/insu-03686237/file/amt-10-3007-2017.pdf BIBCODE: 2017AMT.10.3007B doi:10.5194/amt-10-3007-2017 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1867-1381 EISSN: 1867-8548 Atmospheric Measurement Techniques https://insu.hal.science/insu-03686237 Atmospheric Measurement Techniques, 2017, 10, pp.3007-3019. ⟨10.5194/amt-10-3007-2017⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2017 ftinsu https://doi.org/10.5194/amt-10-3007-2017 2024-01-24T17:29:33Z International audience This work is a first approach to correct the systematic errors observed in the aerosol optical depth (AOD) retrieved at nighttime using lunar photometry and calibration techniques dependent on the lunar irradiance model. To this end, nocturnal AOD measurements were performed in 2014 using the CE318-T master Sun-sky-lunar photometer (lunar Langley calibrated) at the Izaña high mountain observatory. This information has been restricted to 59 nights characterized as clean and stable according to lidar vertical profiles. A phase angle dependence as well as an asymmetry within the Moon's cycle of the Robotic Lunar Observatory (ROLO) model could be deduced from the comparison in this 59-night period of the CE318-T calibration performed by means of the lunar Langley calibration and the calibration performed every single night by means of the common Langley technique. Nocturnal AOD has also been compared in the same period with a reference AOD based on daylight AOD extracted from the AErosol RObotic NETwork (AERONET) at the same station. Considering stable conditions, the difference ΔAOD fit , between AOD from lunar observations and the linearly interpolated AOD (the reference) from daylight data, has been calculated. The results show that ΔAOD fit values are strongly affected by the Moon phase and zenith angles. This dependency has been parameterized using an empirical model with two independent variables (Moon phase and zenith angles) in order to correct the AOD for these residual dependencies. The correction of this parameterized dependency has been checked at four stations with quite different environmental conditions (Izaña, Lille, Carpentras and Dakar) showing a significant reduction of the AOD dependence on phase and zenith angles and an improved agreement with daylight reference data. After the correction, absolute AOD differences for day-night-day clean and stable transitions remain below 0.01 for all wavelengths. Article in Journal/Newspaper Aerosol Robotic Network Institut national des sciences de l'Univers: HAL-INSU Atmospheric Measurement Techniques 10 8 3007 3019 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Barreto, África Román, Roberto Cuevas, Emilio Berjón, Alberto J. Almansa, A. Fernando Toledano, Carlos González, Ramiro Hernández, Yballa Blarel, Luc Goloub, Philippe Guirado, Carmen Yela, Margarita Assessment of nocturnal aerosol optical depth from lunar photometry at the Izaña high mountain observatory |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience This work is a first approach to correct the systematic errors observed in the aerosol optical depth (AOD) retrieved at nighttime using lunar photometry and calibration techniques dependent on the lunar irradiance model. To this end, nocturnal AOD measurements were performed in 2014 using the CE318-T master Sun-sky-lunar photometer (lunar Langley calibrated) at the Izaña high mountain observatory. This information has been restricted to 59 nights characterized as clean and stable according to lidar vertical profiles. A phase angle dependence as well as an asymmetry within the Moon's cycle of the Robotic Lunar Observatory (ROLO) model could be deduced from the comparison in this 59-night period of the CE318-T calibration performed by means of the lunar Langley calibration and the calibration performed every single night by means of the common Langley technique. Nocturnal AOD has also been compared in the same period with a reference AOD based on daylight AOD extracted from the AErosol RObotic NETwork (AERONET) at the same station. Considering stable conditions, the difference ΔAOD fit , between AOD from lunar observations and the linearly interpolated AOD (the reference) from daylight data, has been calculated. The results show that ΔAOD fit values are strongly affected by the Moon phase and zenith angles. This dependency has been parameterized using an empirical model with two independent variables (Moon phase and zenith angles) in order to correct the AOD for these residual dependencies. The correction of this parameterized dependency has been checked at four stations with quite different environmental conditions (Izaña, Lille, Carpentras and Dakar) showing a significant reduction of the AOD dependence on phase and zenith angles and an improved agreement with daylight reference data. After the correction, absolute AOD differences for day-night-day clean and stable transitions remain below 0.01 for all wavelengths. |
author2 |
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) |
format |
Article in Journal/Newspaper |
author |
Barreto, África Román, Roberto Cuevas, Emilio Berjón, Alberto J. Almansa, A. Fernando Toledano, Carlos González, Ramiro Hernández, Yballa Blarel, Luc Goloub, Philippe Guirado, Carmen Yela, Margarita |
author_facet |
Barreto, África Román, Roberto Cuevas, Emilio Berjón, Alberto J. Almansa, A. Fernando Toledano, Carlos González, Ramiro Hernández, Yballa Blarel, Luc Goloub, Philippe Guirado, Carmen Yela, Margarita |
author_sort |
Barreto, África |
title |
Assessment of nocturnal aerosol optical depth from lunar photometry at the Izaña high mountain observatory |
title_short |
Assessment of nocturnal aerosol optical depth from lunar photometry at the Izaña high mountain observatory |
title_full |
Assessment of nocturnal aerosol optical depth from lunar photometry at the Izaña high mountain observatory |
title_fullStr |
Assessment of nocturnal aerosol optical depth from lunar photometry at the Izaña high mountain observatory |
title_full_unstemmed |
Assessment of nocturnal aerosol optical depth from lunar photometry at the Izaña high mountain observatory |
title_sort |
assessment of nocturnal aerosol optical depth from lunar photometry at the izaña high mountain observatory |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://insu.hal.science/insu-03686237 https://insu.hal.science/insu-03686237/document https://insu.hal.science/insu-03686237/file/amt-10-3007-2017.pdf https://doi.org/10.5194/amt-10-3007-2017 |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_source |
ISSN: 1867-1381 EISSN: 1867-8548 Atmospheric Measurement Techniques https://insu.hal.science/insu-03686237 Atmospheric Measurement Techniques, 2017, 10, pp.3007-3019. ⟨10.5194/amt-10-3007-2017⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/amt-10-3007-2017 insu-03686237 https://insu.hal.science/insu-03686237 https://insu.hal.science/insu-03686237/document https://insu.hal.science/insu-03686237/file/amt-10-3007-2017.pdf BIBCODE: 2017AMT.10.3007B doi:10.5194/amt-10-3007-2017 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/amt-10-3007-2017 |
container_title |
Atmospheric Measurement Techniques |
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10 |
container_issue |
8 |
container_start_page |
3007 |
op_container_end_page |
3019 |
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1790603987826769920 |