On the impact of temperature on tropospheric ozone concentration levels in urban environments

Abstract

The influence of temperature on tropospheric ozone (O 3 ) concentrations in urban and photochemically polluted areas in the greater Athens region are investigated in the present study. Hourly values of the ambient air temperature used for studying the urban heat island effect in Athens were recorded at twenty-three experimental stations while ozone concentration values were measured at three of the above-mentioned stations and for a period of two years (1996)(1997). The linear correlation between ozone concentration and air temperature values as well as the temporal variation of temperature and ozone concentration, for the above-mentioned experimental stations, were calculated and analysed. Moreover, a neural network approach was used for investigating the impact of temperature on the ozone concentration values over the greater Athens area. The neural network model used ambient air temperature as one of its input parameters and it was found that temperature is a predominant parameter, affecting considerably the ozone concentration values.

Ozone Concentration at Ground Level Depending on the Content of NOx and Meteorological Conditions

“…In this paper we show significant correlations between O 3 levels and meteorological conditions, positive with radiation, air temperature, wind velocity, while negative with air humidity, and negative or positive with atmospheric pressure, which is similar to the findings of Liu et al [10], Aref'ev et al [14], Stathopoulou et al [17], Adame et al [37], Puc and Bosiacka [39].…”

“…In urban areas air flow may be disrupted and so the levels recorded at a given station may not reflect the movement of air masses in a larger spatial scale. O 3 flows into Poland with air masses often coming from southern and south-western Europe [17][18][19]; apart from the wind, other meteorological conditions also significantly influence O 3 levels, especially solar radiation, temperature and humidity [20]. O 3 concentration also depends on other factors, such as terrain, altitude and geographic location [21].…”

Seasonal Variation of Criteria Pollutant in an Urban Coastal Environment: Kuala Terengganu

“…For NEM, PC1 (52.6% of the total variance) was loaded with windspeed, relative and humidity and O 3 which grouped all the meteorological factors in one. O 3 has shown a strong correlation with the meteorological factors [28][29][30][31][32][33][34][35] and thus, falls into the same group. The relative humidity shows a negative score which indicates increasing relative humidity brings negative contributions towards PM 10 concentration as high water vapor content in the air provides washing effects which reduce the amount of particles in the atmosphere [36][37].…”

Environmental impacts of reflective materials: Is high albedo a ‘silver bullet’ for mitigating urban heat island?

“…Among the air pollutants, studies in urban areas have been focused on ozone, due to its strong oxidant property and potential damage to humans once the concentration is increased [137]. Using data from 23 experimental stations, Stathopoulou et al [12] concluded that ambient air temperature is the predominant parameter in affecting the ozone concentration. Among the researchers, Taha is the one that has pioneered most of the studies in this field.…”

“…While a significant spatial and temporal variation is observed in the UHI intensity, many cities show a magnitude of 5-11 o C by mid-morning [4]. Elevated environmental temperatures in urban areas lead to rise of energy consumption for cooling [5][6][7][8], increase of peak electricity demand [9], degradation of air quality [10][11][12][13], and deterioration of thermal stress on residents [14,15]. In particular, UHI 6 temperature, if not negligible [21,53].…”