Assessing Lidar Ratio Impact on CALIPSO Retrievals Utilized for the Estimation of Aerosol SW Radiative Effects across North Africa, the Middle East, and Europe
North Africa, the Middle East, and Europe (NAMEE domain) host a variety of suspended particles characterized by different optical and microphysical properties. In the current study, we investigate the importance of the lidar ratio (LR) on Cloud-Aerosol Lidar with Orthogonal Polarization–Cloud-Aeroso...
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ftdoajarticles:oai:doaj.org/article:1da6c26a1c1743ad86b24a16054b870b 2024-09-09T18:55:34+00:00 Assessing Lidar Ratio Impact on CALIPSO Retrievals Utilized for the Estimation of Aerosol SW Radiative Effects across North Africa, the Middle East, and Europe Anna Moustaka Marios-Bruno Korras-Carraca Kyriakoula Papachristopoulou Michael Stamatis Ilias Fountoulakis Stelios Kazadzis Emmanouil Proestakis Vassilis Amiridis Kleareti Tourpali Thanasis Georgiou Stavros Solomos Christos Spyrou Christos Zerefos Antonis Gkikas 2024-05-01T00:00:00Z https://doi.org/10.3390/rs16101689 https://doaj.org/article/1da6c26a1c1743ad86b24a16054b870b EN eng MDPI AG https://www.mdpi.com/2072-4292/16/10/1689 https://doaj.org/toc/2072-4292 doi:10.3390/rs16101689 2072-4292 https://doaj.org/article/1da6c26a1c1743ad86b24a16054b870b Remote Sensing, Vol 16, Iss 10, p 1689 (2024) NAMEE CALIOP–CALIPSO lidar ratio RTM clear-sky SW Science Q article 2024 ftdoajarticles https://doi.org/10.3390/rs16101689 2024-08-05T17:49:20Z North Africa, the Middle East, and Europe (NAMEE domain) host a variety of suspended particles characterized by different optical and microphysical properties. In the current study, we investigate the importance of the lidar ratio (LR) on Cloud-Aerosol Lidar with Orthogonal Polarization–Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIOP-CALIPSO) aerosol retrievals towards assessing aerosols’ impact on the Earth-atmosphere radiation budget. A holistic approach has been adopted involving collocated Aerosol Robotic Network (AERONET) observations, Radiative Transfer Model (RTM) simulations, as well as reference radiation measurements acquired using spaceborne (Clouds and the Earth’s Radiant Energy System-CERES) and ground-based (Baseline Surface Radiation Network-BSRN) instruments. We are assessing the clear-sky shortwave (SW) direct radiative effects (DREs) on 550 atmospheric scenes, identified within the 2007–2020 period, in which the primary tropospheric aerosol species (dust, marine, polluted continental/smoke, elevated smoke, and clean continental) are probed using CALIPSO. RTM runs have been performed relying on CALIOP retrievals in which the default and the DeLiAn (Depolarization ratio, Lidar ratio, and Ångström exponent)-based aerosol-speciated LRs are considered. The simulated fields from both configurations are compared against those produced when AERONET AODs are applied. Overall, the DeLiAn LRs leads to better results mainly when mineral particles are either solely recorded or coexist with other aerosol species (e.g., sea-salt). In quantitative terms, the errors in DREs are reduced by ~26–27% at the surface (from 5.3 to 3.9 W/m 2 ) and within the atmosphere (from −3.3 to −2.4 W/m 2 ). The improvements become more significant (reaching up to ~35%) for moderate-to-high aerosol loads (AOD ≥ 0.2). Article in Journal/Newspaper Aerosol Robotic Network Directory of Open Access Journals: DOAJ Articles Remote Sensing 16 10 1689 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
NAMEE CALIOP–CALIPSO lidar ratio RTM clear-sky SW Science Q |
spellingShingle |
NAMEE CALIOP–CALIPSO lidar ratio RTM clear-sky SW Science Q Anna Moustaka Marios-Bruno Korras-Carraca Kyriakoula Papachristopoulou Michael Stamatis Ilias Fountoulakis Stelios Kazadzis Emmanouil Proestakis Vassilis Amiridis Kleareti Tourpali Thanasis Georgiou Stavros Solomos Christos Spyrou Christos Zerefos Antonis Gkikas Assessing Lidar Ratio Impact on CALIPSO Retrievals Utilized for the Estimation of Aerosol SW Radiative Effects across North Africa, the Middle East, and Europe |
topic_facet |
NAMEE CALIOP–CALIPSO lidar ratio RTM clear-sky SW Science Q |
description |
North Africa, the Middle East, and Europe (NAMEE domain) host a variety of suspended particles characterized by different optical and microphysical properties. In the current study, we investigate the importance of the lidar ratio (LR) on Cloud-Aerosol Lidar with Orthogonal Polarization–Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIOP-CALIPSO) aerosol retrievals towards assessing aerosols’ impact on the Earth-atmosphere radiation budget. A holistic approach has been adopted involving collocated Aerosol Robotic Network (AERONET) observations, Radiative Transfer Model (RTM) simulations, as well as reference radiation measurements acquired using spaceborne (Clouds and the Earth’s Radiant Energy System-CERES) and ground-based (Baseline Surface Radiation Network-BSRN) instruments. We are assessing the clear-sky shortwave (SW) direct radiative effects (DREs) on 550 atmospheric scenes, identified within the 2007–2020 period, in which the primary tropospheric aerosol species (dust, marine, polluted continental/smoke, elevated smoke, and clean continental) are probed using CALIPSO. RTM runs have been performed relying on CALIOP retrievals in which the default and the DeLiAn (Depolarization ratio, Lidar ratio, and Ångström exponent)-based aerosol-speciated LRs are considered. The simulated fields from both configurations are compared against those produced when AERONET AODs are applied. Overall, the DeLiAn LRs leads to better results mainly when mineral particles are either solely recorded or coexist with other aerosol species (e.g., sea-salt). In quantitative terms, the errors in DREs are reduced by ~26–27% at the surface (from 5.3 to 3.9 W/m 2 ) and within the atmosphere (from −3.3 to −2.4 W/m 2 ). The improvements become more significant (reaching up to ~35%) for moderate-to-high aerosol loads (AOD ≥ 0.2). |
format |
Article in Journal/Newspaper |
author |
Anna Moustaka Marios-Bruno Korras-Carraca Kyriakoula Papachristopoulou Michael Stamatis Ilias Fountoulakis Stelios Kazadzis Emmanouil Proestakis Vassilis Amiridis Kleareti Tourpali Thanasis Georgiou Stavros Solomos Christos Spyrou Christos Zerefos Antonis Gkikas |
author_facet |
Anna Moustaka Marios-Bruno Korras-Carraca Kyriakoula Papachristopoulou Michael Stamatis Ilias Fountoulakis Stelios Kazadzis Emmanouil Proestakis Vassilis Amiridis Kleareti Tourpali Thanasis Georgiou Stavros Solomos Christos Spyrou Christos Zerefos Antonis Gkikas |
author_sort |
Anna Moustaka |
title |
Assessing Lidar Ratio Impact on CALIPSO Retrievals Utilized for the Estimation of Aerosol SW Radiative Effects across North Africa, the Middle East, and Europe |
title_short |
Assessing Lidar Ratio Impact on CALIPSO Retrievals Utilized for the Estimation of Aerosol SW Radiative Effects across North Africa, the Middle East, and Europe |
title_full |
Assessing Lidar Ratio Impact on CALIPSO Retrievals Utilized for the Estimation of Aerosol SW Radiative Effects across North Africa, the Middle East, and Europe |
title_fullStr |
Assessing Lidar Ratio Impact on CALIPSO Retrievals Utilized for the Estimation of Aerosol SW Radiative Effects across North Africa, the Middle East, and Europe |
title_full_unstemmed |
Assessing Lidar Ratio Impact on CALIPSO Retrievals Utilized for the Estimation of Aerosol SW Radiative Effects across North Africa, the Middle East, and Europe |
title_sort |
assessing lidar ratio impact on calipso retrievals utilized for the estimation of aerosol sw radiative effects across north africa, the middle east, and europe |
publisher |
MDPI AG |
publishDate |
2024 |
url |
https://doi.org/10.3390/rs16101689 https://doaj.org/article/1da6c26a1c1743ad86b24a16054b870b |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_source |
Remote Sensing, Vol 16, Iss 10, p 1689 (2024) |
op_relation |
https://www.mdpi.com/2072-4292/16/10/1689 https://doaj.org/toc/2072-4292 doi:10.3390/rs16101689 2072-4292 https://doaj.org/article/1da6c26a1c1743ad86b24a16054b870b |
op_doi |
https://doi.org/10.3390/rs16101689 |
container_title |
Remote Sensing |
container_volume |
16 |
container_issue |
10 |
container_start_page |
1689 |
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1809908082474483712 |