Photochemical ozone formation in north west Europe and its control

Derwent, R.G.; Jenkin, Michael E.; Saunders, S. M.; Pilling, Michael J.; Simmonds, Peter; Passant, Neil; Dollard, G. J.; Dumitrean, P.; Kent, Adam J.R.

doi:10.1016/s1352-2310(03)00031-1

Cited by 171 publications

(97 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These data confirm earlier reports of stable or decreasing O 3 concentrations in summertime O 3 peak concentrations, e.g. (Bronnimann et al, 2002;Derwent et al, 2003;NEGTAP, 2001). An independent statistical analysis of the Mace Head data, separating long-term trends from seasonal variations, showed different behaviour depending on the air mass origin (Carslaw, 2005).…”

Section: Evidence For Recent Trends In Ground-level Ozone Concentrationssupporting

confidence: 92%

Surface ozone concentrations and ecosystem health: Past trends and a guide to future projections

Cape

2008

Science of The Total Environment

View full text Add to dashboard Cite

This paper reviews current understanding of the sources and sinks of ozone in the troposphere, recent studies of long-term trends, and the factors which have to be taken into consideration when constructing and interpreting future models of ozone concentration. The factors controlling surface O 3 concentrations are discussed initially to provide a basis for the ensuing discussion, followed by a summary of the evidence for recent trends in ground-level ozone concentrations, i.e. over the past 3 decades, which have shown a significant increase in the annual average in 'background' air typical of the unpolluted northern hemisphere. Closer to precursor sources, although urban winter concentrations have increased, rural peak spring and summer concentrations during ozone 'episodes' have decreased markedly in response to emissions reductions. In order to determine whether such trends are meaningful, the statistical techniques for determining temporal trends are reviewed. The possible causes of long-term trends in ozone are then discussed, with particular reference to the use of chemistry-transport models to interpret past trends. Such models are also used to make predictions of future trends in surface ozone concentrations, but few are comprehensive in integrating future climate changes with changes in land use and in emissions of ozone precursors. Guidance is given on the likely effects of climate/precursor/chemistry interactions so that model predictions can be judged.

show abstract

Section: Evidence For Recent Trends In Ground-level Ozone Concentrationssupporting

confidence: 92%

Surface ozone concentrations and ecosystem health: Past trends and a guide to future projections

Cape

2008

Science of The Total Environment

View full text Add to dashboard Cite

show abstract

“…The data do, however, show clear indications of reductions in NMVOC concentration levels during the 1990s (Solberg, 2004). Continuous NMVOC monitoring data from urban background sites in the UK have shown a decrease of 4.5% yr −1 and 12% yr −1 for individual species during 1994-2000 (Derwent et al, 2003). Thijsse et al (1999) showed that there was a shift in the NMVOC composition at Dutch sites during 1990-1997, with an increasing aliphatic/aromatic ratio over this period.…”

Section: Trends In Measured Ozone Precursor Levelsmentioning

confidence: 99%

“…Since the late 1980s the emissions of ozone precursors, NO x , CO and NMVOC (non-methane volatile organic compounds) have been substantially reduced in most parts of Europe (Vestreng et al, 2004). The reduction in the emissions has resulted in corresponding reductions in the measured concentrations of these precursor species (Derwent et al, 2003;Solberg, 2004). The anticipated effect of these reductions is that ozone levels in the summer months would be reduced, and that environmentally set thresholds for ozone would be less frequently violated.…”

Section: Introductionmentioning

confidence: 99%

Can we explain the trends in European ozone levels?

et al. 2006

View full text Add to dashboard Cite

Abstract. Ozone levels in Europe are changing. Emissions of ozone precursors from Europe (NO x , CO and nonmethane hydrocarbons) have been substantially reduced over the last 10-15 years, but changes in ozone levels cannot be explained by changes in European emissions alone. The observed ozone trends at many European sites are only partially reproduced by global or regional photochemistry models, and possible reasons for this are discussed.In order to further explain the European trends in ozone since 1990, the EMEP regional photochemistry model has been run for the years 1990 and 1995-2002. The EMEP model is a regional model centred over Europe but the model domain also includes most of the North Atlantic and the polar region. Climatological ozone data are used as initial and lateral boundary concentrations. Model results are compared to measurements over this timespan of 12 years. Possible causes for the measured trends in European surface ozone have been investigated using model sensitivity runs perturbing emissions and lateral boundary concentrations. The increase in winter ozone partially, and the decrease in the magnitude of high ozone episodes, is attributed to the decrease in ozone precursor emissions since 1990 by the model. Furthermore, the model calculations indicate that the emission reductions have resulted in a marked decrease in summer ozone in major parts of Europe, in particular in Germany. Such a trend in summer ozone is likely to be difficult to identify from the measurements alone because of large inter-annual variability.

show abstract

“…During this reaction NO 2 is formed, which is a precursor of ozone and ozone therefore formation increases with gusts concentrations of hydrocarbons. 21,22 Figure 4 presents correlations between the wind and ozone concentrations. Although somewhat higher concentrations were recorded in the sector extending west to northwest, there were no significant differences in ozone concentrations as far as wind direction is concerned.…”

Section: Resultsmentioning

confidence: 99%

Assessment of Variations of O3 Concentrations in Kopački Rit Nature Park, Eastern Croatia

Kovač-Andrić¹,

Gvozdić²,

Muharemović³

2013

Croat. Chem. Acta

View full text Add to dashboard Cite

Abstract. Result of the first ozone monitoring in ambient air Nature Park of Kopački Rit (Eastern Croatia) are reported for the growth season in 2008. The measured hourly concentrations of ozone in the air do not exceed the limit value of 110 μg m -3 statutory regulation by Croatian legalization for the protection of human health. There were only 13 days exceeding of the target value of 120 μg m -3 (8-h averages) as established in the European Union guidelines on ozone pollution in ambient air. In contrast to the measured AOT40 whose value does not exceed the critical level of 18 000 (µg m -3 ) · h for vegetation injury, an estimated AOT40 value was somewhat higher. The relationships between O 3 and meteorological variables were investigated by a principal component analysis (PCA). Fourier analysis methods applied to ozone concentrations data showed that the most important variations in the O 3 data are represented by usual daily cycles. (doi: 10.5562/cca2147)

show abstract

Photochemical ozone formation in north west Europe and its control

Cited by 171 publications

References 7 publications

Surface ozone concentrations and ecosystem health: Past trends and a guide to future projections

Surface ozone concentrations and ecosystem health: Past trends and a guide to future projections

Can we explain the trends in European ozone levels?

Assessment of Variations of O3 Concentrations in Kopački Rit Nature Park, Eastern Croatia

Contact Info

Product

Resources

About