Meteorological and altitudinal influences on the concentration of ozone at Great Dun Fell

Gay, Maxime

doi:10.1016/0960-1686(91)90261-5

Cited by 10 publications

(1 citation statement)

References 7 publications

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“…Such studies appear restricted in scope on account of the following reason: the use of aircrafts enables ozone measurements between 1 and 13 km in altitude but provide little information about ozone levels in the fi rst few • hundred meters immediately above the ground surface, as it is practically impossible for aircrafts to sweep close to ground level (Fabian & Pruchniewicz, 1977;Fishman & Seiler, 1983;Joos & Maffi olo, 1989). Measurements carried out at different altitudes along a mountain gradient in England (Gay, 1991), Japan ( Murao et al, 1990), Austria (Puxbaum et al, 1991) and Canada (Peake et al, 1983) gave some indication of the vertical variation of ozone but failed to provide accurate infor1nation because such measurements at different altitudes were made at the ground level and, thus, were not completely free from diverse infl uences operative at ground level and may not have truly represented the vertical ozone gradient. To eliminate such shortcomings, in a recent study, synoptic measurements were carried out in New Delhi at different heights from high rise buildings to determine the true vertical ozone variation in an urban environment exhibiting a positive trend (Varshney & Aggarwal, 1993).…”

Section: Introductionmentioning

confidence: 99%

Vertical Stratification of Ozone in Different Seasons in the Lower Troposphere of New Delhi

Aggarwal¹,

Varshney²

1995

Terr. Atmos. Ocean. Sci.

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Vertical ozone measurements were carried out in the urban environment of New Delhi, in three different seasons from 1989-1991. Air sampling was done synoptically at ground level, 23 m, 51 m, 57 m, 117 m and 153 m heights. A significant positive vertical gradient in the ozone concentration was observed at all sites. At any given time, ozone levels were lowest at the ground level and invariably increased with increasing distance from the ground. A� � . ... distinct seasonal variation in the vertical ozone profile was also observed'.'Ozone concentration was highest in summer at all heights. The peak in ozone concentration during the day, appeared. earlier at all heights in summers, in comparison to winter and spring. At the 51 m height in summers, the ozone concentration decreased rapidly during the late evening. Such vertical ozone stratification. may have severe implications for trees and residents of high rise buildings particularly in urban and industrial conglomerations which serve as the prime foci in the release of ozone forming substances.

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Section: Introductionmentioning

confidence: 99%

Vertical Stratification of Ozone in Different Seasons in the Lower Troposphere of New Delhi

Aggarwal¹,

Varshney²

1995

Terr. Atmos. Ocean. Sci.

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SMOGSTOP: a model for forecasting maximum daily ozone concentration in Belgium

Lissens¹,

Debruyn²,

Mensink³

et al. 2000

Environmetrics

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Every summer, ground level ozone concentrations rise in Belgium and cause episodes of photochemical summer smog. This phenomenon is the cause of well recognised public health distress, especially for people suffering from respiratory diseases. To warn groups of sensitive people against forthcoming smog episodes, VITO (the Flemish Institute for Technological Research) and VMM (the Flemish Environmental Agency) have joined forces to create an ozone pollution forecasting model, called SMOGSTOP (Statistical Model Of Groundlevel Short Term Ozone Pollution). SMOGSTOP is used by Belgian government agencies to issue ozone reports and warnings in the media (TV, radio, internet, etc.). Ozone pollution levels, as well as concentrations of other air pollutants, are monitored in Belgium by the telemetric air quality measuring networks of the three Belgian regions: Flanders, Wallonia and Brussels. The major meteorological variables, such as the windvector, temperature, pressure, humidity and precipitation, are also monitored by the same networks. The historical time series of those variables, generated by the networks, are the source of input data for SMOGSTOP. Photochemical ozone pollution is the result of complex non‐linear interactions between atmospheric pollutants and meteorology. As a consequence, it is extremely difficult to determine relationships between source emissions (ozone precursors) and ambient pollutant concentrations (ozone). To deal with this complexity, SMOGSTOP was constructed as an empirical model, applying a VITO tailor‐made methodology called stratified pattern matching, to link meteorological and precursor information into ozone forecasts. In this paper, an overview of the process of ozone formation in Belgium is given, followed by the definition of the explanatory variables which will be used in the model. Then the methodology behind the model is reported and finally the results of the forecasting efforts in the period of 1.5.1995 till 31.8.1995 are presented. Copyright © 2000 John Wiley & Sons, Ltd.

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Vertical ozone variation in the lower troposphere of Delhi

Varshney

Aggarwal

1993

Environ Monit Assess

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Measurements of ozone in the urban environment of Delhi were carried out at ground level and heights of 23m, 51m, 117m and 153m at four different sites synoptically during 1989-90. A considerable ozone build up was observed all over Delhi and a significant vertical variation in its concentration was observed at all sites. At any given time O3 levels were lowest at ground level and invariably increased with increasing distance from the ground.

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Meteorological and altitudinal influences on the concentration of ozone at Great Dun Fell

Cited by 10 publications

References 7 publications

Vertical Stratification of Ozone in Different Seasons in the Lower Troposphere of New Delhi

Vertical Stratification of Ozone in Different Seasons in the Lower Troposphere of New Delhi

SMOGSTOP: a model for forecasting maximum daily ozone concentration in Belgium

Vertical ozone variation in the lower troposphere of Delhi

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