Aerosol Distributions and Transport over Southern Morocco from Ground-Based and Satellite Observations (2004–2020)
The present study investigates the optical properties of aerosols on daily and seasonal scales with the use of the aerosol optical depth (AOD) and Angström exponent (AE) data retrieved from AErosol RObotic NETwork (AERONET) and collected at four stations in Southern Morocco-Saada (31.63°N; 8.16°W),...
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Language: | English |
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2022
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Online Access: | https://hal.univ-reunion.fr/hal-04137069 https://hal.univ-reunion.fr/hal-04137069/document https://hal.univ-reunion.fr/hal-04137069/file/atmosphere-13-00923-v4.pdf https://doi.org/10.3390/atmos13060923 |
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ftccsdartic:oai:HAL:hal-04137069v1 2023-07-23T04:12:56+02:00 Aerosol Distributions and Transport over Southern Morocco from Ground-Based and Satellite Observations (2004–2020) Millet, Tristan Bencherif, Hassan Bounhir, Aziza Bègue, Nelson Lamy, Kévin Ranaivombola, Marion Benkhaldoun, Zouhair Portafaix, Thierry Duflot, Valentin Laboratoire de l'Atmosphère et des Cyclones (LACy) Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS)-Météo-France Université Cadi Ayyad Marrakech (UCA) 2022-06-06 https://hal.univ-reunion.fr/hal-04137069 https://hal.univ-reunion.fr/hal-04137069/document https://hal.univ-reunion.fr/hal-04137069/file/atmosphere-13-00923-v4.pdf https://doi.org/10.3390/atmos13060923 en eng HAL CCSD MDPI info:eu-repo/semantics/altIdentifier/doi/10.3390/atmos13060923 hal-04137069 https://hal.univ-reunion.fr/hal-04137069 https://hal.univ-reunion.fr/hal-04137069/document https://hal.univ-reunion.fr/hal-04137069/file/atmosphere-13-00923-v4.pdf doi:10.3390/atmos13060923 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 2073-4433 EISSN: 2073-4433 Atmosphere https://hal.univ-reunion.fr/hal-04137069 Atmosphere, 2022, 13, ⟨10.3390/atmos13060923⟩ Aerosol aerosol optical depth Angström exponent aerosol volumetric size distribution AERONET MODIS MERRA-2 CAMS HYSPLIT dust desert Morocco [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2022 ftccsdartic https://doi.org/10.3390/atmos13060923 2023-07-01T23:00:26Z The present study investigates the optical properties of aerosols on daily and seasonal scales with the use of the aerosol optical depth (AOD) and Angström exponent (AE) data retrieved from AErosol RObotic NETwork (AERONET) and collected at four stations in Southern Morocco-Saada (31.63°N; 8.16°W), Ouarzazate (30.93°N; 6.91°W), Oukaïmeden (31.21°N; 7.86°W) and Ras-El-Aïn (31.67°N; 7.60°W). An evaluation of the aerosol volumetric size distribution (AVSD) is also obtained for Saada and Ouarzazate. An AOD inter-comparison is performed between AERONET data and satellite sensors (MODerate resolution Imaging Spectroradiometer-MODIS), as well as assimilation products (Modern-Era Retrospective analysis for Research and Applications, version 2 (MERRA-2) and Copernicus Atmosphere Monitoring Service (CAMS)), by the means of a linear regression. Regardless of site location and elevation, the results show the prevalence of the annual cycle of AOD, with a maximum in summer and a minimum in winter. In association with this seasonal variation, the variations in AE and AVSD showed an increase in coarse mode over Ouarzazate and Saada during summer (July to August), underlining that Southern Morocco is prone to the regular transport of desert dust on a seasonal basis. The inter-comparison reveals that the MERRA-2 dataset is slightly more appropriate for the study region, since it shows correlation coefficients (r) ranging from 0.758 to 0.844 and intercepts ranging from 0.021 to 0.070, depending on the study site. The statistical analysis of the back-trajectories simulated by the HYbrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT) model were consistent with the observations and confirmed the dominance of desert dust aerosols during the summer over the study region. On the other hand, the winter season reveals a predominance of anthropogenic and oceanic aerosols originating from the north and the west of the study site. Article in Journal/Newspaper Aerosol Robotic Network Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Merra ENVELOPE(12.615,12.615,65.816,65.816) Atmosphere 13 6 923 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Aerosol aerosol optical depth Angström exponent aerosol volumetric size distribution AERONET MODIS MERRA-2 CAMS HYSPLIT dust desert Morocco [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
Aerosol aerosol optical depth Angström exponent aerosol volumetric size distribution AERONET MODIS MERRA-2 CAMS HYSPLIT dust desert Morocco [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Millet, Tristan Bencherif, Hassan Bounhir, Aziza Bègue, Nelson Lamy, Kévin Ranaivombola, Marion Benkhaldoun, Zouhair Portafaix, Thierry Duflot, Valentin Aerosol Distributions and Transport over Southern Morocco from Ground-Based and Satellite Observations (2004–2020) |
topic_facet |
Aerosol aerosol optical depth Angström exponent aerosol volumetric size distribution AERONET MODIS MERRA-2 CAMS HYSPLIT dust desert Morocco [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
The present study investigates the optical properties of aerosols on daily and seasonal scales with the use of the aerosol optical depth (AOD) and Angström exponent (AE) data retrieved from AErosol RObotic NETwork (AERONET) and collected at four stations in Southern Morocco-Saada (31.63°N; 8.16°W), Ouarzazate (30.93°N; 6.91°W), Oukaïmeden (31.21°N; 7.86°W) and Ras-El-Aïn (31.67°N; 7.60°W). An evaluation of the aerosol volumetric size distribution (AVSD) is also obtained for Saada and Ouarzazate. An AOD inter-comparison is performed between AERONET data and satellite sensors (MODerate resolution Imaging Spectroradiometer-MODIS), as well as assimilation products (Modern-Era Retrospective analysis for Research and Applications, version 2 (MERRA-2) and Copernicus Atmosphere Monitoring Service (CAMS)), by the means of a linear regression. Regardless of site location and elevation, the results show the prevalence of the annual cycle of AOD, with a maximum in summer and a minimum in winter. In association with this seasonal variation, the variations in AE and AVSD showed an increase in coarse mode over Ouarzazate and Saada during summer (July to August), underlining that Southern Morocco is prone to the regular transport of desert dust on a seasonal basis. The inter-comparison reveals that the MERRA-2 dataset is slightly more appropriate for the study region, since it shows correlation coefficients (r) ranging from 0.758 to 0.844 and intercepts ranging from 0.021 to 0.070, depending on the study site. The statistical analysis of the back-trajectories simulated by the HYbrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT) model were consistent with the observations and confirmed the dominance of desert dust aerosols during the summer over the study region. On the other hand, the winter season reveals a predominance of anthropogenic and oceanic aerosols originating from the north and the west of the study site. |
author2 |
Laboratoire de l'Atmosphère et des Cyclones (LACy) Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS)-Météo-France Université Cadi Ayyad Marrakech (UCA) |
format |
Article in Journal/Newspaper |
author |
Millet, Tristan Bencherif, Hassan Bounhir, Aziza Bègue, Nelson Lamy, Kévin Ranaivombola, Marion Benkhaldoun, Zouhair Portafaix, Thierry Duflot, Valentin |
author_facet |
Millet, Tristan Bencherif, Hassan Bounhir, Aziza Bègue, Nelson Lamy, Kévin Ranaivombola, Marion Benkhaldoun, Zouhair Portafaix, Thierry Duflot, Valentin |
author_sort |
Millet, Tristan |
title |
Aerosol Distributions and Transport over Southern Morocco from Ground-Based and Satellite Observations (2004–2020) |
title_short |
Aerosol Distributions and Transport over Southern Morocco from Ground-Based and Satellite Observations (2004–2020) |
title_full |
Aerosol Distributions and Transport over Southern Morocco from Ground-Based and Satellite Observations (2004–2020) |
title_fullStr |
Aerosol Distributions and Transport over Southern Morocco from Ground-Based and Satellite Observations (2004–2020) |
title_full_unstemmed |
Aerosol Distributions and Transport over Southern Morocco from Ground-Based and Satellite Observations (2004–2020) |
title_sort |
aerosol distributions and transport over southern morocco from ground-based and satellite observations (2004–2020) |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal.univ-reunion.fr/hal-04137069 https://hal.univ-reunion.fr/hal-04137069/document https://hal.univ-reunion.fr/hal-04137069/file/atmosphere-13-00923-v4.pdf https://doi.org/10.3390/atmos13060923 |
long_lat |
ENVELOPE(12.615,12.615,65.816,65.816) |
geographic |
Merra |
geographic_facet |
Merra |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_source |
ISSN: 2073-4433 EISSN: 2073-4433 Atmosphere https://hal.univ-reunion.fr/hal-04137069 Atmosphere, 2022, 13, ⟨10.3390/atmos13060923⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3390/atmos13060923 hal-04137069 https://hal.univ-reunion.fr/hal-04137069 https://hal.univ-reunion.fr/hal-04137069/document https://hal.univ-reunion.fr/hal-04137069/file/atmosphere-13-00923-v4.pdf doi:10.3390/atmos13060923 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.3390/atmos13060923 |
container_title |
Atmosphere |
container_volume |
13 |
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6 |
container_start_page |
923 |
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1772186571796119552 |