KAZALCI OKOLJA

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Bad

Trends in annual precipitation are not as obvious as temperature trends. Changes between years and regions are significant. According to the climate change projections, annual precipitation will slightly increase while changes in seasonal precipitation will be noticeable. The most worrying are summer conditions, because less precipitation and higher temperature might result in higher frequency of droughts. In winter, more precipitation may lead to an increase in flooding events.

Bad

Precipitation is highly variable in space and time, even more than temperature (storms and hail). In the last two decades, Slovenia is observing catastrophic droughts and abundant precipitation resulting in floods, sometimes drought and floods occur even within the same year. The maximum snow cover depth and the depth of fresh snow decreased in the period 1961-2011

Bad

In the period 2002-2020, the highest exposure to ozone concentrations were detected in the Primorska region in summer where air quality measuring stations in Koper and Nova Gorica detected highest ozone concentrations in ambient air. There are some differences from year to year in a level of ozone exposure due to meteorological conditions in the warm half of the year and other regional characteristics.  

Good

Concentrations of sulphur dioxide in ambient air are no longer harmful for human health. Also, the critical annual value for the protection of vegetation is no longer exceeded. The improvement of the situation in the last decade is a result of the use of low-sulphur fuels in industry and the operation of desulphurisation facilities in thermal power plants.

Good

Concentrations of nitrogen dioxide and total nitrogen oxides in ambient air do not exceed the prescribed limit values. Consequently, they are not harmful for human health and vegetation.

Bad

In recent years, ambient concentrations of ozone in urban and suburban areas has been above target value for human health protection. Long-term targets have been exceeded at almost all measuring sites. Due to fewer hot sunny summer seasons, the information threshold levels have been exceeded only in the Primorska region and in some places at higher altitudes - Otlica. However, also some exceedances have been recorded at measuring sites that are not directly exposed to traffic.

Neutral

Air pollution with PM10 was on average lower in 2020 than in previous years. The number of exceedances of the daily limit value for PM10 (50 ug/m3) surpassed allowed number of exceedances (35) only at one monitoring site in mainland Slovenia, and at this monitoring site two out of thirty-six exceedances are due to desert dust, which according to legislation is considered as natural source of pollution and is not taken into account with prescribed quality standards.

Good

In Slovenia, total emissions of the pollutants that contribute to acidification and eutrophication have decreased by 78 % between 1990 and 2018. Emissions of SOx have decreased by 98 %, NOx by 53 % and NH3 by 19 %. The emissions of sulphur oxides, nitrogen oxides and ammonia were in 2018 below the prescribed target values.

Good

Emissions of total ozone precursors in Slovenia decreased by 55 % in the period 1990 to 2018. Emissions of nitrogen oxides decreased by 53 %, carbon monoxide by 68 %, non-methane volatile organic compounds by 51 % and methane by 24 %. The reason is mainly the introduction of more stringent emission standards for motor vehicles. This measure contributed to a significant reduction in emissions of nitrogen oxides and carbon dioxide from road transport which is the main source of ozone precursors.


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