Air quality

[PS09] Precipitation

31.08.2019

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. We shall be worried about 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.

Climate change Water Air quality

[PS10] Extreme precipitation

27.08.2019

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.

Human health and ecosystem resilience Air quality Climate change

[ZD29] Population exposure to ozone

20.11.2018

In the period 2002-2017, 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.

Air quality

[ZR05] Air pollution by sulphur dioxide

12.01.2018

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.

Air quality

[ZR06] Air pollution by nitrogen dioxide

12.01.2018

The measured concentrations of nitrogen dioxide and total nitrogen oxides in outdoor air do not exceed the prescribed limit values, so these two pollutants are not harmful human health and vegetation.

Air quality

[ZR07] Air pollution by ozone

12.01.2018

In recent years, the level of air pollution with ozone has been above the target value in most locations, including rural areas and higher altitudes, while (due to less sunny and cooler summers) the action value has been exceeded only in the Primorska region and in some places at higher altitudes. The highest ozone concentrations have been recorded in the Primorska region due to weather patterns that are favourable for ozone formation and the transport of ozone and its precursors from northern Italy.

Air quality Green economy

[ZR08] Air pollution by particulate matter PM₁₀ in PM_2.5

26.06.2020

In 2019, PM₁₀pollution was just slightly lower than in 2018. The reason was changeable weather with periods of participations and high temperature, especially in November and December when no temperature inversions occured.

Air quality

[ZR09] Emissions of substances that cause acidification and eutrophication

21.08.2018

In Slovenia, total emissions of the pollutants that contribute to acidification and eutrophication have decreased by 78 % between 1990 and 2016. Emissions of SO_x have decreased by 97 %, NO_x by 48 % and NH₃ by 17 %. The emissions of sulphur oxides, nitrogen oxides and ammonia were in 2016 below the prescribed target values.

Air quality

[ZR10] Emissions of ozone-precursors

31.08.2019

Emissions of total ozone precursors decreased by 52 % in the period 1990 to 2016. Emissions of nitrogen oxides decreased by 48 %, carbon monoxide by 64 %, non-methane volatile organic compounds by 52 % and methane by 14 %. 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.

Air quality