Abstract:

This study analyses the weather conditions, the main pathways and transport mechanisms favouring the presence of specific aerosol types over Athens, Greece. On the basis of the aerosol optical depth at 550 nm (AOD 550) and fine mode (FM) values from a Terra-MODIS dataset in the period 2000-2005, three main aerosol types are identified (urban/industrial, UI; clean maritime, CM; and desert dust, DD), each one corresponding to different optical characteristics and source regions. The UI aerosols are associated with polluted air masses from Europe, the CM aerosols with clean Atlantic air masses and the DD aerosols with air masses from North African arid regions carrying significant amount of dust in certain cases. The comparison of the three aerosol types with the air masses from their favourable sector constitutes a first 'quick-validation' of the identification scheme. Thus, the incidence of transport from Europe explain 81% of the variability in the observed UI type, while the 73% of the Atlantic air masses correspond to the CM type; the 50% of the African air masses can be considered as DD aerosols over Athens. The mean synoptic meteorological patterns, favouring the presence of each aerosol type, are also investigated. Further analysing the air-mass trajectories at three altitudes, the transport mechanisms of the aerosol types are identified. The results clearly show that the UI aerosols are mainly transported within the boundary layer, while the CM conditions are associated with Atlantic air masses at higher altitudes. Moreover, the DD aerosols are transported either in the upper atmosphere or in the whole atmospheric column. This is among the first studies conducted over Athens aiming at investigating the weather conditions, pathways and transport mechanisms that favour the presence of aerosols of different characteristics. © 2011 Royal Meteorological Society.

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Cited By :9Export Date: 2 November 2015CODEN: IJCLECorrespondence Address: Nastos, P.T.; Laboratory of Climatology and Atmospheric Environment, Department of Geography and Climatology, Faculty of Geology and Geoenvironment, University of Athens, Panepistimiopolis, GR 15784 Athens, Greece; email: nastos@geol.uoa.grReferences: Adamopoulos, A.D., Kambezidis, H.D., Kaskaoutis, D.G., Giavis, G., A study on aerosols size in the atmosphere of Athens, Greece, retrieved from solar spectral measurements (2007) Atmospheric Research, 86, pp. 194-206;Alpert, P., Kishcha, P., Shtivelman, A., Krichak, S.O., Joseph, J.H., Vertical distribution of Saharan dust based on 2.5-year model Predictions (2004) Atmospheric Research, 70, pp. 109-130; Amiridis, V., Balis, D.S., Kazadzis, S., Bais, A., Giannakaki, E., Papayannis, A., Zerefos, C., Four-year aerosol observations with a Raman lidar at Thessaloniki, Greece, in the framework of European Aerosol Research Lidar Network (EARLINET) (2005) Journal of Geophysical Research, 110. , DOI:10.1029/2005JD006190; Antoine, D., Nobileau, D., Recent increase of Saharan dust transport over the Meditterenean Sea, as revealed from ocean color satellite (SeaWiFS) observations (2006) Journal of Geophysical Research, 111, pp. D12214. , DOI:10.1029/2005JD006795; Astitha, M., Kallos, G., Katsafados, P., Air pollution modeling in the Mediterranean Region: Analysis and forecasting of episodes (2008) Atmospheric Research, 89, pp. 358-364; Badarinath, K.V.S., Kumar Kharol, S., Kaskaoutis, D.G., Kambezidis, H.D., Dust storm over Indian region and its impact on the ground reaching solar radiation-A case study using multi-satellite data and ground measurements (2007) Science of the Total Environment, 384, pp. 316-332; Badarinath, K.V.S., Kumar Kharol, S., Rani Sharma, A., Long-range transport of aerosols from agriculture crop residue burning in Indo-Gangetic Plains-A study using LIDAR, ground measurements and satellite data (2008) Journal of Atmospheric and Solar-Terrestrial Physics, 71 (1), pp. 112-120; Baldasano, J.M., Valera, E., Jimenez, P., Air quality data from large cities (2003) Science of the Total Environment, 307, pp. 141-165; Balis, D.S., Amiridis, V., Zerefos, C.S., Gerasopoulos, E., Andrae, M., Zanis, P., Kazantzidis, A., Papayannis, A., Raman lidar and sunphotometric measurements of aerosol optical properties over Thessaloniki, Greece during a biomass-burning episode (2003) Atmospheric Environment, 37, pp. 4529-4538; Barnaba, F., Gobbi, G.P., Aerosol seasonal variability over the Mediterranean region and ralative impact of maritime, continental and Saharan dust particles over the basin from MODIS data in the year 2001 (2004) Atmospheric Chemistry and Physics, 4, pp. 2367-2391; Bartzokas, A., Metaxas, D.A., The annual variation of pressure over the Northern Hemisphere (1990) Zeitschrift fur Meteorologie, 40 (5), pp. 311-315; Berthier, S., Chazette, P., Couvert, P., Pelon, J., Dulac, F., Thieuleux, F., Moulin, C., Pain, T., Desert dust aerosol columnar properties over ocean and continental Africa from Lidar in-Space Technology Experiment (LITE) and Meteosat synergy (2006) Journal of Geophysical Research, 111, pp. D12214. , DOI:10.1029/2005JD005222; Cachorro, V., Toledano, C., Prats, N., Sorribas, M., Mogo, S., Berjón, A., Torres, B., De Frutos, A.M., The strongest desert dust intrusion mixed with smoke over Iberian Peninsula registered with sun Photometry (2008) Journal of Geophysical Research, 113, pp. D14S04. , DOI:10.1029/2007JD009582; Carmona, I., Alpert, P., Synoptic classification of moderate resolution imaging spectroradiometer aerosols over Israel (2009) Journal of Geophysical Research, 114, pp. D07208. , DOI:10.1029/2008JD010160; Chin, M., Chu, A., Levy, R., Remer, L., Kaufman, Y., Holben, B., Eck, T., Gao, Q., Aerosol distribution in the Northern Hemisphere during ACE-Asia: Results from global model, satellite observations, and Sun photometer measurements (2004) Journal of Geophysical Research, 109, pp. D23S90. , DOI:10.1029/2004JD004829; Colette, A., Menut, L., Haeffelin, M., Morille, Y., Impact of the transport of aerosols from the free troposphere towards the boundary layer on the air quality in the Paris area (2008) Atmospheric Environment, 42, pp. 390-402; De Graaf, M., Stammes, P., Torres, O., Koelemeijer, R.B.A., Absorbing Aerosol Index: Sensitivity Analysis, application to GOME and comparison with TOMS (2005) Journal of Geophysical Research, 110, pp. D01201. , DOI:10.1029/2004JD005178; di Sarra, A., di Iorio, T., Cacciani, M., Fiocco, G., Fuà, D., Saharan dust profiles measured by lidar at Lampedusa (2001) Journal of Geophysical Research, 106, pp. 10335-10348; Draxler, R.R., Rolph, G.D., (2003), HYSPLIT (Hybrid single-particle Lagrangian Integrated Trajectory) model, NOAA Air Resources Laboratory, Silver, Spring, MDDockery, D.W., Pope, C., Acute respiratory effects of particulate air pollution (1994) Annual Review of Public Health, 15, pp. 107-132; Duncan, B.N., Bey, I., A modeling study of the export pathways of pollution from Europe: Seasonal and interannual variations (1987-1997) (2004) Journal of Geophysical Research, 109, pp. D08301. , DOI:10.1029/JD004079; El-Metwally, M., Alfaro, S.C., Abdel Wahab, M., Chatenet, B., Aerosol characteristics over urban Cairo: Seasonal variations as retrieved from Sun photometer (2008) Journal of Geophysical Research, 113, pp. D14219. , DOI:10.1029/2008JD009834; Engelstaedter, S., Tegen, I., Washington, R., North African dust emissions and transport (2006) Earth-Science Reviews, 79, pp. 73-100; Fotiadi, A., Hatzianastassiou, N., Drakakis, E., Matsoukas, C., Pavlakis, K.G., Hatzidimitriou, D., Gerasopoulos, E., Vardavas, I., Aerosol physical and optical properties in the Eastern Mediterranean Basin, Crete, from Aerosol Robotic Network data (2006) Atmospheric Chemistry and Physics, 6, pp. 5399-5413; Franke, K., Ansmann, A., Muller, D., Althausen, D., Venkataraman, C., Reddy, M.S., Wanger, F., Scheele, R., Optical properties of the Indo-Asian haze layer over the tropical Indian Ocean (2003) Journal of Geophysical Research, 108, pp. D4059. , DOI:10.1029/2002JD002473; Gobbi, G.P., Barnaba, F., Giorgi, R., Santacasa, A., Altitude-resolved properties of a Saharan-Dust event over the Mediterranean (2000) Atmospheric Environment, 34, pp. 5119-5127; Gobbi, G.P., Barnaba, F., Ammannato, L., Estimating the impact of Saharan dust on the year 2001 PM 10 record of Rome, Italy (2007) Atmospheric Environment, 41, pp. 261-275; Grivas, G., Chaloulakou, A., Kassomenos, P., An overview of the PM10 pollution problem, in the Metropolitan Area of Athens, Greece. Assessment of controlling factors and potential impact of long range transport (2007) Science of the Total Environment, 389, pp. 165-177; Hatzianastassiou, N., Matsoukas, C., Drakakis, E., Stackhouse, J.R., Koepke, P., Fotiadi, A., Pavlakis, K.G., Vardavas, I., The direct effect of aerosols on solar radiation based on satellite observations, reanalysis datasets, and spectral aerosol optical properties from Global Aerosol Data Set (GADS) (2007) Atmospheric Chemistry and Physics, 7, pp. 2585-2599; Haywood, J.M., Boucher, O., Estimates of the direct and indirect radiative forcing due to troposheric aerosols: a review (2000) Reviews of Geophysics, 38, pp. 513-543; Hsu, N.C., Herman, J.R., Torres, O., Holben, N.B., Tanre, D., Eck, T.F., Smirnov, A., Lavenu, F., Comparisons of the TOMS aerosol index with sunphotometer aerosol optical thickness: Results and applications (1999) Journal of Geophysical Research, 104, pp. 6269-6279; Summary for Policymakers (2007) Climate Change 2007: The Physical Science Basis, , IPCC In: Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Solomon S, Qin D, Manning M, Chen Z, Marquis M, Averyt KB, Tignor M, Miller HL (eds). Cambridge University Press: Cambridge, United Kingdom and New York, NY, USA; Kalivitis, N., Gerasopoulos, E., Vrekousis, M., Kouvarakis, G., Kubilay, N., Hatzianastassiou, N., Vardavas, I., Mihalopoulos, N., Dust transport over the Eastern Mediterranean from TOMS, AERONET and surface measurements (2007) Journal of Geophysical Research, 112, pp. D03202. , DOI:10.1029/2006JD007510; Kallos, G., Astitha, M., Katsafados, P., Spyrou, C., Long-range transport of anthropogenically and naturally produced particulate matter in the Mediterranean and North Atlantic: Current state of knowledge (2007) Journal of Applied Meteorology and Climatology, 46, pp. 1230-1251; Kallos, G., Kotroni, V., Lagouvardos, K., Papadopoulos, A., On the long-range transport of air pollutants from Europe to Africa (1998) Geophysical Research Letters, 25, pp. 619-622; Kallos, G., Papadopoulos, A., Katsafados, P., Nickovic, S., Transatlantic Saharan dust transport : Model simulation and results (2006) Journal of Geophysical Research, 111, pp. D09204. , DOI:10.1029/2005JD006207; Kaskaoutis, D.G., Badarinath, K.V.S., Kharol, S.K., Sharma, A.R., Kambezidis, H.D., Variations in the aerosol optical properties and types over the tropical urban site of Hyderabad, India (2009) Journal of Geophysical Research, 114, pp. D22204; Kaskaoutis, D.G., Kambezidis, H.D., Nastos, P.T., Kosmopoulos, P.G., Study on an intense dust storm over Greece (2008) Atmospheric Environment, 42, pp. 6884-6896; Kaskaoutis, D.G., Kosmopoulos, P., Kambezidis, H.D., Nastos, P.T., Aerosol climatology and discrimination of different types over Athens, Greece based on MODIS data (2007) Atmospheric Environment, 41, pp. 7315-7329; Kazadzis, S., Bais, A., Amiridis, V., Balis, D., Meleti, C., Kouremeti, N., Zerefos, C.S., Keletsoglou, K., Nine years of UV aerosol optical depth measurements at Thessaloniki, Greece (2007) Atmospheric Chemistry and Physics, 7, pp. 2091-2101; King, M.D., Kaufman, Y.J., Tanrè, D., Nakajima, T., Remote sensing of tropospheric aerosols from space: Past, present, and future (1999) Bulletin of American Meteorology Society, 80, pp. 2229-2259; Kinne, S., Schulz, M., Textor, C., Guibert, S., Balkanski, Y., Bauer, S.E., Berntsen, T., Tie, X., An AeroCom initial assessment-optical properties in aerosol component modules of global models (2006) Atmospheric Chemistry and Physics, 6, pp. 1815-1834; Kosmopoulos, P.G., Kaskaoutis, D.G., Nastos, P.T., Kambezidis, H.D., Seasonal variation of columnar aerosol optical properties over Athens, Greece, based on MODIS data (2008) Remote Sensing of Environment, 112, pp. 2354-2366; Koukouli, M.E., Balis, D.S., Amiridis, V., Kazadzis, S., Bais, A., Nickovic, S., Torres, O., Aerosol variability over Thessaloniki using ground based remote sensing observations and the TOMS aerosol index (2006) Atmospheric Environment, 40, pp. 5367-5378; Kubilay, N., Oguz, T., Kocak, M., Ground-based assessment of Total Ozone Mapping Spectrometer (TOMS) data for dust transport over the northeastern Mediterranean (2005) Global Biogeochemical Cycles, 19, pp. GB1022. , DOI:10.1029/2004 GB002370; Lelieveld, J., Berresheim, H., Borrmann, S., Crutzen, P.J., Dentener, F.J., Fischer, H., Feichter, J., Ziereis, H., Global air pollution crossroads over the Mediterranean (2002) Science, 298, pp. 794-999; Levin, Z., Ganor, E., Gladstein, V., The effects of desert particles coated with sulphate on rain formation in the eastern Mediterranean (1996) Journal of Applied Meteorology, 35, pp. 1511-1523; Levy, R.C., Remer, L.A., Tanre, D., Kaufman, Y.J., Ichoku, C., Holben, B., Livingston, J., Mating, H., Evaluation of the MODIS retrievals of dust aerosol over the ocean during PRIDE (2003) Journal of Geophysical Research, 108. , DOI:10.1029/2002JD002460; Levy, R.C., Remer, L.A., Dobovik, O., Global aerosol optical properties and application to Moderate Resolution Imaging spectroradiometer aerosol retrieval over land (2007) Journal of Geophysical Research, 112, pp. D13210. , DOI:10.1029/2006JD007815; Lolis, C.J., Metaxas, D.A., Bartzokas, A., On the intra-annual variability of atmospheric circulation in the Mediterranean region (2008) International Journal of Climatology, 28, pp. 1339-1355; Madhavan, B.L., Niranjan, K., Sreekanth, V., Sarin, M.M., Sudheer, A.K., Aerosol xharacterization during the summer monsoon period over a tropical coastal Indian station, Visakhapatnam (2008) Journal of Geophysical Research, 113, pp. D21208. , DOI:10.1029/2008JD010272; Meloni, D., di Sarra, A., Biavati, G., DeLuisi, J.J., Monteleone, F., Pace, G., Piacentino, S., Sferlazzo, D.M., Seasonal behavior of Saharan dust events at the Mediterranean island of Lampedusa in the period 1999-2005 (2007) Atmospheric Environment, 41, pp. 3041-3056; Meloni, D., di Sarra, A., Monteleone, F., Pace, G., Piacentino, S., Sferlazzo, D.M., Seasonal transport patterns of intense Saharan dust events at the Mediterranean island of Lampedusa (2008) Atmospheric Research, 88, pp. 134-148; Metaxas, D.A., Bartzokas, A., Pressure covariability over the Atlantic, Europe and N. Africa. Application: Centers of action for temperature, winter precipitation and summer winds in Athens, Greece (1994) Theoretical and Applied Climatology, 49, pp. 9-18; Millan, M., Salvador, R., Mantilla, E., Kallos, G., Photo oxidant dynamics in the Mediterranean Basin in summer: Results from European research projects (1997) Journal of Geophysical Research, 102, pp. 8811-8823; Moulin, C., Lambert, C.E., Dayan, U., Masson, V., Ramonet, M., Bosquet, P., Legrand, M., Dulac, F., Satellite climatology of African dust transport in Mediterranean atmosphere (1998) Journal of Geophysical Research, 103, pp. 13137-13144; Nair, V.S., Moorthy, K.K., Babu, S.S., Satheesh, S.K., Optical and physical properties of atmospheric aerosols over the Bay of Bengal during ICARB (2009) Journal of Atmospheric Science, 66, pp. 2640-2658; Nastos, P.T., Philandras, C.M., Repapis, C.C., Application of Canonical Analysis to Air Temperature and Precipitation Regimes over Greece (2002) Fresenius Environmental Bulletin, 11 (8), pp. 488-493; Nastos, P.T., Zerefos, C.S., Decadal changes in extreme daily precipitation totals in Greece (2008) Advances in Geosciences, 16, pp. 55-62; Niranjan, K., Malleswara Rao, B., Saha, A., Murthy, K.S.R., Aerosol spectral optical depths and size characteristics at a coastal industrial location in India-Effect of synoptic and mesoscale weather (2004) Annales Geophysicae, 22, pp. 1851-1860; Pace, G., di Sarra, A., Meloni, D., Piacentino, S., Chamard, P., Aerosol optical properties at Lampeduca (Cenral Mediterranean). 1. Influence of transport and identification of different aerosol types (2006) Atmospheric Chemistry and Physics, 6, pp. 697-713; Papadimas, C.D., Hatzianastassiou, N., Mihalopoulos, N., Querol, X., Vardavas, I., Spatial and temporal variability of aerosol properties over Mediterranean basin based on 6 years (2000-2006) MODIS data (2008) Journal of Geophysical Research, 113, pp. D11205. , DOI:10.1029/2007JD 009189; Papayannis, A., Balis, D., Amiridis, V., Chourdakis, G., Tsaknakis, G., Zerefos, C.S., Castanho, A.D.A., Grabowski, J., Measurements of Saharan dust aerosols over the Eastern Mediterranean using elastic backscatter-Raman lidar, spectrophotometric and satellite observations in the frame of the EARLINET project (2005) Atmospheric Chemistry and Physics, 5, pp. 2065-2079; Pope, C.A., Epidemiology of fine particulate air pollution and human health: Biologic mechanisms and who's at risk? (2000) Environmental Health Perspectives, 108, pp. 713-723; Pope, C.A., Dockery, D.W., Acute health effects of PM 10 pollution on symptomatic and asymptomatic children (2002) American Review Respiratory Disease, 145, pp. 1123-1128; Prospero, J.M., Ginoux, P., Torres, O., Nicholson, S.E., Gill, T., Environmental characterization of global sources of atmospheric soil dust identified with Nimbus 7 Total Ozone Mapping Spectrometer (TOMS) absorbing aerosol product (2002) Reviews of Geophysics, 40. , DOI:10.1029/2000RG000095; Querol, X., Pey, J., Pandolfi, M., Alastuey, A., Cusack, M., Pérez, N., Moreno, T., Kleanthous, S., African dust contributions to mean ambient PM10 mass-levels across the Mediterranean Basin (2009) Atmospheric Environment, 43, pp. 4266-4277; Ramachandran, S., Spectral aerosol optical characteristics during the northeast monsoon over the Arabian Sea and the tropical Indian Ocean: 1. Aerosol optical depths and their variabilities (2004) Journal of Geophysical Research, 109, pp. D19207. , DOI:10.1029/2003JD004476; Ramachandran, S., Aerosol optical depth and fine mode fraction variations deduced from Moderate Resolution Imaging Spectroradiometer (MODIS) over four urban areas in India (2007) Journal of Geophysical Research, 112, pp. D16207. , DOI:10.1029/2007JD008500; Remer, L.A., Kaufman, Y.J., Tanre, D., Mattoo, S., Chu, D.A., Martins, J.V., Li, R.R., Holben, B.N., The MODIS aerosol algorithm, products, and validation (2005) Journal of Atmospheric Sciences, 62, pp. 947-973; Saha, A., Despiau, S., Seasonal and diurnal variations of black carbon aerosols over a Mediterranean coastal zone (2009) Atmospheric Research, 92, pp. 27-41; Santese, M., De Tomasi, F., Perrone, M.R., AERONET versus MODIS aerosol parameters at different spatial resolutions over southeast Italy (2007) Journal of Geophysical Research, 112, pp. D10214. , DOI:10.1029/2006JD007742; Satheesh, S.K., Srinivasan, J., Krishna Moorthy, K., Contribution of sea-salt to aerosol optical depth over the Arabian Sea derived from MODIS observations (2006) Geophysical Research Letters, 33, pp. L03809. , DOI:10.1029/2005GL024856; Stohl, A., Eckhardt, S., Forster, C., James, P., Spichtinger, N., On the pathways and timescales of intercontinental air pollution transport (2002) Journal of Geophysical Research, 107, pp. D4684. , DOI:10.1029/2001JD001396; Tafuro, A.M., Barnaba, F., De Tomasi, F., Perrone, M.R., Gobbi, G.P., Saharan dust particle properties over the central Mediterranean (2006) Atmospheric Research, 81, pp. 67-93; Tegen, I., Fung, I., Modeling of mineral dust in the atmosphere: Sources, transport, and optical thickness (1994) Journal of Geophysical Research, 99 (D11), pp. 22897-22914; Torres, O., Bhartia, P.K., Herman, J.R., Ahmad, Z., Gleason, J., Derivation of aerosol properties from satellite measurements of backscattered ultraviolet radiation: Theoretical basis (1998) Journal of Geophysical Research, 103, pp. 17099-17110; Viana, M., Perez, C., Querol, X., Alastuey, A., Nickovic, S., Baldasano, J.M., Spatial and temporal variability of PM levels and composition in a complex summer atmospheric scenario in Barcelona (NE Spain) (2005) Atmospheric Environment, 39, pp. 5343-5361; Zerefos, C., Ganev, K., Kourtidis, K., Tzortziou, M., Vasaras, A., Syrakov, E., On the origin of SO 2 above northern Greece (2000) Geophysical Research Letters, 27, pp. 365-368; Zerefos, C.S., Kourtidis, K.A., Melas, D., Balis, D., Zanis, P., Mantis, H.T., Repapis, C., Calpini, B., Photochemical Activity and Solar Ultraviolet Radiation (PAUR) Modulation Factors: An overview of the project (2002) Journal of Geophysical Research, 107, p. 8134. , DOI:10.1029/2000JD000134

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