Contribution to column-integrated aerosol typing based on Sunphotometry using different criteria
This study analyses the aerosol optical and microphysical properties obtained by the Aerosol Robotic Network (AERONET) in seven different sites operating in the Iberian Peninsula during three coincident years (2010−2012) with the objective of studying different aerosol typing approaches. This area i...
Published in: | Atmospheric Research |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier
2019
|
Subjects: | |
Online Access: | http://hdl.handle.net/10481/56258 https://doi.org/10.1016/j.atmosres.2019.03.007 |
id |
ftunivgranada:oai:digibug.ugr.es:10481/56258 |
---|---|
record_format |
openpolar |
spelling |
ftunivgranada:oai:digibug.ugr.es:10481/56258 2023-05-15T13:07:15+02:00 Contribution to column-integrated aerosol typing based on Sunphotometry using different criteria Foyo Moreno, Inmaculada Alados Arboledas, Lucas Guerrero Rascado, Juan Luis Lyamani, H. Pérez Ramírez, Daniel Olmo Reyes, Francisco José 2019-03-04 http://hdl.handle.net/10481/56258 https://doi.org/10.1016/j.atmosres.2019.03.007 eng eng Elsevier European Union's Horizon 2020 research and innovation programme through project ACTRIS-2 (grant agreement No 654109) http://hdl.handle.net/10481/56258 https://doi.org/10.1016/j.atmosres.2019.03.007 info:eu-repo/semantics/openAccess atmospheric Aerosol info:eu-repo/semantics/article 2019 ftunivgranada https://doi.org/10.1016/j.atmosres.2019.03.007 2022-05-03T23:23:48Z This study analyses the aerosol optical and microphysical properties obtained by the Aerosol Robotic Network (AERONET) in seven different sites operating in the Iberian Peninsula during three coincident years (2010−2012) with the objective of studying different aerosol typing approaches. This area is of interest due to its location between the Sahara desert (the largest source of natural aerosols in the world) and mainland Europe (a relevant source of anthropogenic aerosols). In particular, we study the aerosol optical depth (AOD), Angström parameter (α440–870) and fine mode fraction (FMF), which are estimated from direct sun irradiance measurements. Additionally, the single scattering albedo (ωo) and aerosol particle size distribution (PSD), which are computed using additional sky radiances measurements under cloudless skies, are used in our analyses. The analyses show aerosol seasonal patterns in the AOD with maximum values in summer/spring and minimum values in winter/autumn for all the analysed stations. For α440–870, there are differences from site to site, with maximum values in winter and minimum values in summer for the southern locations, while there is not a remarkable pattern for the eastern locations close to the Mediterranean coast. The frequent and intense Saharan dust outbreaks over the southern Iberian Peninsula and the intense anthropogenic activity in the eastern urban locations are behind these seasonal patterns in the AOD and α440–870. In this work, two of the most employed classification schemes of aerosol type in the literature are used: one is based on the AOD and α440–870, the other one is based on ωo at 440 nm and the FMF and a new classification scheme based on ωo at 440 nm and FMF is proposed. The results revealed that the new classification method is more appropriate for distinguishing the aerosol types that affect the Iberian Peninsula. The relationship derived here between Δωo = ωo (440)- ωo (1020) and the FMF is demonstrated to be useful for aerosol type classification when no measurements of the sky radiances, and consequently of ωo(440), are available. Alternatively, the relationship between the ratio Δωo/ωo(440) and the FMF can be used because (Δωo/ωo) provides information about both the spectral ωo and the absolute values. Spanish Ministry of Economy and Competitiveness through projects CGL2013-45410-R Spanish Ministry of Economy and Competitiveness through projects CGL2016-81092-R Spanish Ministry of Economy and Competitiveness through projects CGL2017-90884-REDT Andalusia Regional Government through projects P12-RNM-2409 Article in Journal/Newspaper Aerosol Robotic Network DIGIBUG: Repositorio Institucional de la Universidad de Granada Atmospheric Research 224 1 17 |
institution |
Open Polar |
collection |
DIGIBUG: Repositorio Institucional de la Universidad de Granada |
op_collection_id |
ftunivgranada |
language |
English |
topic |
atmospheric Aerosol |
spellingShingle |
atmospheric Aerosol Foyo Moreno, Inmaculada Alados Arboledas, Lucas Guerrero Rascado, Juan Luis Lyamani, H. Pérez Ramírez, Daniel Olmo Reyes, Francisco José Contribution to column-integrated aerosol typing based on Sunphotometry using different criteria |
topic_facet |
atmospheric Aerosol |
description |
This study analyses the aerosol optical and microphysical properties obtained by the Aerosol Robotic Network (AERONET) in seven different sites operating in the Iberian Peninsula during three coincident years (2010−2012) with the objective of studying different aerosol typing approaches. This area is of interest due to its location between the Sahara desert (the largest source of natural aerosols in the world) and mainland Europe (a relevant source of anthropogenic aerosols). In particular, we study the aerosol optical depth (AOD), Angström parameter (α440–870) and fine mode fraction (FMF), which are estimated from direct sun irradiance measurements. Additionally, the single scattering albedo (ωo) and aerosol particle size distribution (PSD), which are computed using additional sky radiances measurements under cloudless skies, are used in our analyses. The analyses show aerosol seasonal patterns in the AOD with maximum values in summer/spring and minimum values in winter/autumn for all the analysed stations. For α440–870, there are differences from site to site, with maximum values in winter and minimum values in summer for the southern locations, while there is not a remarkable pattern for the eastern locations close to the Mediterranean coast. The frequent and intense Saharan dust outbreaks over the southern Iberian Peninsula and the intense anthropogenic activity in the eastern urban locations are behind these seasonal patterns in the AOD and α440–870. In this work, two of the most employed classification schemes of aerosol type in the literature are used: one is based on the AOD and α440–870, the other one is based on ωo at 440 nm and the FMF and a new classification scheme based on ωo at 440 nm and FMF is proposed. The results revealed that the new classification method is more appropriate for distinguishing the aerosol types that affect the Iberian Peninsula. The relationship derived here between Δωo = ωo (440)- ωo (1020) and the FMF is demonstrated to be useful for aerosol type classification when no measurements of the sky radiances, and consequently of ωo(440), are available. Alternatively, the relationship between the ratio Δωo/ωo(440) and the FMF can be used because (Δωo/ωo) provides information about both the spectral ωo and the absolute values. Spanish Ministry of Economy and Competitiveness through projects CGL2013-45410-R Spanish Ministry of Economy and Competitiveness through projects CGL2016-81092-R Spanish Ministry of Economy and Competitiveness through projects CGL2017-90884-REDT Andalusia Regional Government through projects P12-RNM-2409 |
format |
Article in Journal/Newspaper |
author |
Foyo Moreno, Inmaculada Alados Arboledas, Lucas Guerrero Rascado, Juan Luis Lyamani, H. Pérez Ramírez, Daniel Olmo Reyes, Francisco José |
author_facet |
Foyo Moreno, Inmaculada Alados Arboledas, Lucas Guerrero Rascado, Juan Luis Lyamani, H. Pérez Ramírez, Daniel Olmo Reyes, Francisco José |
author_sort |
Foyo Moreno, Inmaculada |
title |
Contribution to column-integrated aerosol typing based on Sunphotometry using different criteria |
title_short |
Contribution to column-integrated aerosol typing based on Sunphotometry using different criteria |
title_full |
Contribution to column-integrated aerosol typing based on Sunphotometry using different criteria |
title_fullStr |
Contribution to column-integrated aerosol typing based on Sunphotometry using different criteria |
title_full_unstemmed |
Contribution to column-integrated aerosol typing based on Sunphotometry using different criteria |
title_sort |
contribution to column-integrated aerosol typing based on sunphotometry using different criteria |
publisher |
Elsevier |
publishDate |
2019 |
url |
http://hdl.handle.net/10481/56258 https://doi.org/10.1016/j.atmosres.2019.03.007 |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_relation |
European Union's Horizon 2020 research and innovation programme through project ACTRIS-2 (grant agreement No 654109) http://hdl.handle.net/10481/56258 https://doi.org/10.1016/j.atmosres.2019.03.007 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.atmosres.2019.03.007 |
container_title |
Atmospheric Research |
container_volume |
224 |
container_start_page |
1 |
op_container_end_page |
17 |
_version_ |
1766042813728817152 |