Inter-annual variations of ozone and nitrogen dioxide over Europe during 1958-2003 simulated with a regional CTM

• Abstract Inter-annual variability of surface ozone(O3) and nitrogen dioxide (NO2) over Europe hasbeen studied over the period 1958-2003 using athree-dimensional Chemistry-Transport Model coupledto meteorological data from the ERA40 data setproduced at the European Centre of Medium-rangeWeather Forecasts (ECMWF). Emissions and boundaryconditions were kept at present levels throughoutthe simulation period. It was found that the annualmean NO2 concentration varies between ±50% andthe summer mean O3 concentration varies between-10 and +20 percent (%) compared to the 46-yearaverage over the model domain. There is alsovariation in ozone and NO2 over longer time scales.The last 22 years display high concentrations ofozone in central and south-western Europe and lowconcentrations in north-eastern Europe. The first22 years display very high concentrations of NO2over the North Sea. There is indication of trends inozone and nitrogen dioxide but this has to beinvestigated further. Such information is one factorthat should be taken into account when consideringfuture control strategies.

Ämnesord

NATURVETENSKAP  -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)

NATURAL SCIENCES  -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)

Nyckelord

air pollution

MATCH

meteorological variability

policy

simulation

NATURAL SCIENCES

NATURVETENSKAP

Atmosphere and hydrosphere sciences

Atmosfärs- och hydrosfärsvetenskap

Meteorology

Meteorologi

Applied Environmental Science

tillämpad miljövetenskap

Publikations- och innehållstyp

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