A Decade of Aerosol Optical Properties Measurements over Athens, Greece
Long-term ground-based measurements of aerosol optical properties in Athens, Greece, for the period 2008−2018 performed by the National Observatory of Athens are used in order to investigate the aerosol climatology of the area. In this study, we utilize quality-assured measurements of the...
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doaj-ce100dcc264746b58a869d05fc28b2082020-11-25T02:05:27ZengMDPI AGAtmosphere2073-44332020-01-0111215410.3390/atmos11020154atmos11020154A Decade of Aerosol Optical Properties Measurements over Athens, GreeceIoannis-Panagiotis Raptis0Stelios Kazadzis1Vassilis Amiridis2Antonis Gkikas3Evangelos Gerasopoulos4Nikolaos Mihalopoulos5Institute for Environmental Research and Sustainable Development, National Observatory of Athens, GR15236 Athens, GreecePhysicalisch-Meteorologisches Observatorium Davos, World Radiation Center, CH-7260 Davos, SwitzerlandInstitute for Astronomy, Astrophysics, Space Applications and Remote Sensing, National Observatory of Athens, GR15236 Athens, GreeceInstitute for Astronomy, Astrophysics, Space Applications and Remote Sensing, National Observatory of Athens, GR15236 Athens, GreeceInstitute for Environmental Research and Sustainable Development, National Observatory of Athens, GR15236 Athens, GreeceInstitute for Environmental Research and Sustainable Development, National Observatory of Athens, GR15236 Athens, GreeceLong-term ground-based measurements of aerosol optical properties in Athens, Greece, for the period 2008−2018 performed by the National Observatory of Athens are used in order to investigate the aerosol climatology of the area. In this study, we utilize quality-assured measurements of the aerosol optical depth (AOD), Single Scattering Albedo (SSA) and Ångström exponent obtained by CIMEL photometers in the framework of the Aerosol Robotic Network (AERONET) to extract the seasonality and the trends of aerosols in the region. Higher aerosol loads are found during spring and summer months. A 1.1% per year decrease for AOD at 440 nm and 0.4% decrease per year for SSA during the studied period are recorded. Collocated and synchronous PM<sub>10</sub> values, for a five-year period, are used in order to study ground-level conditions. Also, the Planetary Boundary Layer Height from ERA-5 is used to investigate the stratification of the particles. The classification of aerosols using AERONET data is performed to separate dust, biomass burning, polluted urban, marine and continental dominant aerosol mixtures. Also, the characterization of AOD provided by Copernicus Atmosphere Monitoring Service (CAMS) is investigated. Finally, seasonal AOD trends recorded from AERONET from satellite sensors (MODIS-Aqua/MODIS-Terra) and estimated by CAMS are examined, and significant differences have been found.https://www.mdpi.com/2073-4433/11/2/154aerosolsclimatologyaeronetathensmodisaerosol classificationaerosol trends |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Ioannis-Panagiotis Raptis Stelios Kazadzis Vassilis Amiridis Antonis Gkikas Evangelos Gerasopoulos Nikolaos Mihalopoulos |
spellingShingle |
Ioannis-Panagiotis Raptis Stelios Kazadzis Vassilis Amiridis Antonis Gkikas Evangelos Gerasopoulos Nikolaos Mihalopoulos A Decade of Aerosol Optical Properties Measurements over Athens, Greece Atmosphere aerosols climatology aeronet athens modis aerosol classification aerosol trends |
author_facet |
Ioannis-Panagiotis Raptis Stelios Kazadzis Vassilis Amiridis Antonis Gkikas Evangelos Gerasopoulos Nikolaos Mihalopoulos |
author_sort |
Ioannis-Panagiotis Raptis |
title |
A Decade of Aerosol Optical Properties Measurements over Athens, Greece |
title_short |
A Decade of Aerosol Optical Properties Measurements over Athens, Greece |
title_full |
A Decade of Aerosol Optical Properties Measurements over Athens, Greece |
title_fullStr |
A Decade of Aerosol Optical Properties Measurements over Athens, Greece |
title_full_unstemmed |
A Decade of Aerosol Optical Properties Measurements over Athens, Greece |
title_sort |
decade of aerosol optical properties measurements over athens, greece |
publisher |
MDPI AG |
series |
Atmosphere |
issn |
2073-4433 |
publishDate |
2020-01-01 |
description |
Long-term ground-based measurements of aerosol optical properties in Athens, Greece, for the period 2008−2018 performed by the National Observatory of Athens are used in order to investigate the aerosol climatology of the area. In this study, we utilize quality-assured measurements of the aerosol optical depth (AOD), Single Scattering Albedo (SSA) and Ångström exponent obtained by CIMEL photometers in the framework of the Aerosol Robotic Network (AERONET) to extract the seasonality and the trends of aerosols in the region. Higher aerosol loads are found during spring and summer months. A 1.1% per year decrease for AOD at 440 nm and 0.4% decrease per year for SSA during the studied period are recorded. Collocated and synchronous PM<sub>10</sub> values, for a five-year period, are used in order to study ground-level conditions. Also, the Planetary Boundary Layer Height from ERA-5 is used to investigate the stratification of the particles. The classification of aerosols using AERONET data is performed to separate dust, biomass burning, polluted urban, marine and continental dominant aerosol mixtures. Also, the characterization of AOD provided by Copernicus Atmosphere Monitoring Service (CAMS) is investigated. Finally, seasonal AOD trends recorded from AERONET from satellite sensors (MODIS-Aqua/MODIS-Terra) and estimated by CAMS are examined, and significant differences have been found. |
topic |
aerosols climatology aeronet athens modis aerosol classification aerosol trends |
url |
https://www.mdpi.com/2073-4433/11/2/154 |
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