Aerosol Monitoring over Athens Using Satellite and Ground-Based Measurements
Satellite data of moderate spatial resolution (MODIS and MERIS) were used to retrieve the aerosol optical depth (AOD) over the urban area of Athens. MODIS products were obtained at a horizontal resolution of 10 by 10 km2 centered over Athens, while the differential textural analysis (DTA) code was a...
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| Format: | Article |
| Language: | English |
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Wiley
2010-01-01
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| Series: | Advances in Meteorology |
| Online Access: | http://dx.doi.org/10.1155/2010/147910 |
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| author | D. G. Kaskaoutis N. Sifakis A. Retalis H. D. Kambezidis |
| author_facet | D. G. Kaskaoutis N. Sifakis A. Retalis H. D. Kambezidis |
| author_sort | D. G. Kaskaoutis |
| collection | DOAJ |
| description | Satellite data of moderate spatial resolution (MODIS and MERIS) were used to retrieve the aerosol optical depth (AOD) over the urban area of Athens. MODIS products were obtained at a horizontal resolution of 10 by 10 km2 centered over Athens, while the differential textural analysis (DTA) code was applied to MERIS images to retrieve relative-to-reference AOD with a resolution of 260 m by 290 m. The possibility of exploiting the full resolution of MERIS data in retrieving AOD over a grid of a few hundreds metres was thereby investigated for the first time. MERIS-based AOD, centred at 560 nm, showed strong positive correlation to ground-based PM10 data (R2 = 0.85), while MODIS AOD products were in agreement with both MERIS and PM10. Back trajectories were used to study the impact of atmospheric conditions prevailing during the examined days. Days associated with Saharan air masses corresponded to enhanced AOD and predominance of coarse-mode particles. The results suggest that, at least for the case of Athens, AOD retrieved by MERIS images using the DTA code over cloud-free areas can be related to PM10. The accuracy of retrieval mainly depends on the successful selection of the reference satellite data, namely, an image being least contaminated by tropospheric aerosols. |
| format | Article |
| id | doaj-art-8e7808ebef5943e19ed4765e8932c505 |
| institution | Kabale University |
| issn | 1687-9309 1687-9317 |
| language | English |
| publishDate | 2010-01-01 |
| publisher | Wiley |
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| series | Advances in Meteorology |
| spelling | doaj-art-8e7808ebef5943e19ed4765e8932c5052025-02-03T01:23:31ZengWileyAdvances in Meteorology1687-93091687-93172010-01-01201010.1155/2010/147910147910Aerosol Monitoring over Athens Using Satellite and Ground-Based MeasurementsD. G. Kaskaoutis0N. Sifakis1A. Retalis2H. D. Kambezidis3Atmospheric Research Team, Institute for Environmental Research and Sustainable Development, National Observatory of Athens, Lofos Nymphon, P.O. Box 20048, 11810 Athens, GreeceInstitute for Space Applications and Remote Sensing, National Observatory of Athens, Metaxa & Vas. Pavlou, Pendeli, 15236 Athens, GreeceAtmospheric Research Team, Institute for Environmental Research and Sustainable Development, National Observatory of Athens, Lofos Nymphon, P.O. Box 20048, 11810 Athens, GreeceAtmospheric Research Team, Institute for Environmental Research and Sustainable Development, National Observatory of Athens, Lofos Nymphon, P.O. Box 20048, 11810 Athens, GreeceSatellite data of moderate spatial resolution (MODIS and MERIS) were used to retrieve the aerosol optical depth (AOD) over the urban area of Athens. MODIS products were obtained at a horizontal resolution of 10 by 10 km2 centered over Athens, while the differential textural analysis (DTA) code was applied to MERIS images to retrieve relative-to-reference AOD with a resolution of 260 m by 290 m. The possibility of exploiting the full resolution of MERIS data in retrieving AOD over a grid of a few hundreds metres was thereby investigated for the first time. MERIS-based AOD, centred at 560 nm, showed strong positive correlation to ground-based PM10 data (R2 = 0.85), while MODIS AOD products were in agreement with both MERIS and PM10. Back trajectories were used to study the impact of atmospheric conditions prevailing during the examined days. Days associated with Saharan air masses corresponded to enhanced AOD and predominance of coarse-mode particles. The results suggest that, at least for the case of Athens, AOD retrieved by MERIS images using the DTA code over cloud-free areas can be related to PM10. The accuracy of retrieval mainly depends on the successful selection of the reference satellite data, namely, an image being least contaminated by tropospheric aerosols.http://dx.doi.org/10.1155/2010/147910 |
| spellingShingle | D. G. Kaskaoutis N. Sifakis A. Retalis H. D. Kambezidis Aerosol Monitoring over Athens Using Satellite and Ground-Based Measurements Advances in Meteorology |
| title | Aerosol Monitoring over Athens Using Satellite and Ground-Based Measurements |
| title_full | Aerosol Monitoring over Athens Using Satellite and Ground-Based Measurements |
| title_fullStr | Aerosol Monitoring over Athens Using Satellite and Ground-Based Measurements |
| title_full_unstemmed | Aerosol Monitoring over Athens Using Satellite and Ground-Based Measurements |
| title_short | Aerosol Monitoring over Athens Using Satellite and Ground-Based Measurements |
| title_sort | aerosol monitoring over athens using satellite and ground based measurements |
| url | http://dx.doi.org/10.1155/2010/147910 |
| work_keys_str_mv | AT dgkaskaoutis aerosolmonitoringoverathensusingsatelliteandgroundbasedmeasurements AT nsifakis aerosolmonitoringoverathensusingsatelliteandgroundbasedmeasurements AT aretalis aerosolmonitoringoverathensusingsatelliteandgroundbasedmeasurements AT hdkambezidis aerosolmonitoringoverathensusingsatelliteandgroundbasedmeasurements |