Observational evidence of an ozone episode over the Greater Athens Area

Peleg, Mordechai; Luria, Menachem; Sharf, Geula; Vanger, Arye; Κάλλος, Γ.; Kotroni, Vassiliki; Lagouvardos, K.; Varinou, M.

doi:10.1016/s1352-2310(97)00251-3

Cited by 34 publications

(22 citation statements)

References 14 publications

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“…These processes, in conjunction with the low deposition velocities of ozone over the sea, allow elevated ozone levels to appear a few hundreds of kilometers south of Athens. Measurements, that were performed during research flights over the greater Athens area and southwards over east of Peloponnese from 6 to 8 July 1994, also indicate that the urban plume of Athens can be tracked down southwards along the southwestern Aegean Sea and the eastern coast of Peloponnese, giving rise to elevated ozone levels more than 200 km south of the Athens Basin (Peleg et al 1997;Kotroni et al 1999).…”

Section: Simulated Mean Ozone Levels Over Greecementioning

confidence: 92%

“…Enhanced ozone levels have been observed over Greece during the summer season both in urban and rural areas (Ziomas 1998;Zerefos et al 2002). There have been extensive studies addressing the problem of increased ozone levels in urban scale, especially for the large urban agglomeration of Athens that suffers from severe photochemical air pollution episodes (Peleg et al 1997;Klemm et al 1998;Ziomas et al 1998;Kotroni et al 1999;Kassomenos et al 2003;Bossioli et al 2007). …”

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confidence: 99%

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Simulated Summertime Regional Ground-Level Ozone Concentrations over Greece

Poupkou

Melas

Ziomas

et al. 2008

Water Air Soil Pollut

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Ground-level ozone concentrations were estimated for Greece during a summer period of the year 2000 using the regional air quality model UAM-V off-line coupled with the mesoscale meteorological model MM5. An anthropogenic NOx, NMVOCs and CO emission inventory and biogenic NMVOCs emission data were used to support model simulations. The evaluation analysis indicates a quite satisfactory model performance in reproducing ozone levels. The simulated mean ozone concentrations are above the 32-ppb EU phytotoxicity limit over almost all continental and maritime areas of Greece. Over the greater part of the country, the background mean ozone levels range from 40 to 55 ppb. Ozone values higher than the 55-ppb EU human health protection limit reaching 60 ppb dominate part of the southern Aegean Sea that is influenced by the Athens urban plume. In the areas where anthropogenic emission densities are high, the mean ozone levels vary between 20 and 40 ppb. Over the greater part of Greece, the simulated mean daily maximum ozone concentrations range from 50 to 65 ppb. More enhanced maximum ozone concentrations up to 95 ppb mainly dominate over the greater areas of the two largest Greek urban centres (Athens and Thessaloniki) and over the continental and maritime areas south of Athens which are under the influence of the urban plume.

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Section: Simulated Mean Ozone Levels Over Greecementioning

confidence: 92%

mentioning

confidence: 99%

Simulated Summertime Regional Ground-Level Ozone Concentrations over Greece

Poupkou

Melas

Ziomas

et al. 2008

Water Air Soil Pollut

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“…O 3 is produced in the troposphere when methane (CH 4 ), non-methane hydrocarbons (NMHCs) and carbon monoxide (CO) are photo-chemically oxidized in the presence of nitrogen oxides (NO x ). The diurnal cycle of O 3 formation and destruction is driven by NO x and Volatile Organic Compounds (VOC) emissions (Peleg et al, 1997;Ryerson et al, 2001) and solar radiation. To retrieve O 3 chemistry, it is necessary to estimate the concentration and reactivity of the different VOCs involved in O 3 formation.…”

Section: Introductionmentioning

confidence: 99%

Observational Study of Surface O3, NOx, CH4 and Total NMHCs at Kannur, India

Nishanth

2014

Aerosol Air Qual. Res.

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This paper presents the results of measurements of the surface ozone (O 3 ), oxides of nitrogen (NO x ), methane (CH 4 ) and total non-methane hydrocarbons (TNMHCs) in a rural coastal location at Kannur (11.9°N, 75.4°E, 5 m asl), India from November 2009 to December 2011. The diurnal cycle for surface O 3 had a peak in the afternoon and declined during nighttime. The maximum and minimum mixing ratio of surface O 3 was observed in winter and monsoon seasons respectively. NO x concentration was high during mid-night to early morning and low during noontime. The diurnal variations of mixing ratios for NO x and O 3 were anti-correlated. Monthly average maximum (2.26 ± 0.44 ppmv) and minimum (0.43 ± 0.19 ppmv) CH 4 concentrations were observed in December and August respectively. The diurnal variations of CH 4 were similar to that of NO x . A CH 4 buildup was observed during early morning hours throughout the observational period. On an annual basis, the maximum, minimum and average total NMHCs were (25.45 ± 6.58 ppbv), (13.84 ± 4.31 ppbv), and (19.23 ± 5.56 ppbv) respectively at the observational site. Analysis of O 3 , NO, NO 2 , CH 4 and NMHC have been carried out and the correlation between O 3 and its precursors is discussed detailed. Further, the diurnal variation of O 3 over a free tropospheric region at Ooty, a hill station lying in the Western Ghats region of south India on clear sky days in February 2011 is also reported for a comparison.

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“…According to literature, the diurnal cycle of chemical formation and destruction is driven by the pattern of NO x and HC emissions, as well as by solar radiation (Peleg et al 1997). In rural areas, photooxidant (NO 2 +O 3 ) levels depend on NO x emissions, even linearly in some cases (Sillman et al 1990;Wang et al 2001).…”

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confidence: 99%

Assessing Spatial Occurrence of Ground Level Ozone around Coal Mining Areas of Chandrapur District, Maharashtra, India

Salve

Satapathy

Katpatal

et al. 2007

Environ Monit Assess

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Stratospheric input and photochemical ozone formation in the troposphere are the two main sources determining the ozone levels in the surface layer of the atmosphere. Because of the importance of ozone in controlling the atmospheric chemistry and its decisive role in the heat balance of atmosphere, leading to climate change, the examination of its formation and destruction are of great interest. This study characterized the distribution of Ground level Ozone (GLO) in Chandrapur district is lying between 19 degrees 25'N to 20 degrees 45'N and 78 degrees 50'E to 80 degrees 10'E. Continuous ozone analyzer was used to quantify GLO at thirteen locations fixed by Global Positioning System (GPS) during the winter of 2005-2006. The daily GLO at all the locations ranged between 6.4 and 24.8 ppbv with an average and standard deviation of 14.9 +/- 6.5 ppbv. The maximum and minimum concentration occurs during 1300-1600 h and 0300-0500 h may be due to high solar radiation facilitating photochemical production of O(3) and downward mixing from the overlying air mass and in situ destruction of ozone by deposition and/or the reaction between O(3) and NO. GIS based spatial distribution of GLO in Chandrapur district is indicates that the central core of the district and southern sites experienced elevated levels of GLO relative to the northern and western areas. The sites near by Chandrapur city are particularly affected by elevated GLO. The average variation of GLO with temperature shows a significant correlation of r = 0.55 indicating a direct relationship between GLO and temperature. Similarly an attempt has been made to compare the GLO monitored data in Chandrapur district with the reported values for other locations in Indian cities. This generated database helps regulatory agencies to identify locations where the natural resources and human health could be at risk.

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Observational evidence of an ozone episode over the Greater Athens Area

Cited by 34 publications

References 14 publications

Simulated Summertime Regional Ground-Level Ozone Concentrations over Greece

Simulated Summertime Regional Ground-Level Ozone Concentrations over Greece

Observational Study of Surface O3, NOx, CH4 and Total NMHCs at Kannur, India

Assessing Spatial Occurrence of Ground Level Ozone around Coal Mining Areas of Chandrapur District, Maharashtra, India

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