Indicator Specification

Air pollution by ozone and health

Indicator Specification
  Indicator codes: CLIM 006
Published 20 Nov 2012 Last modified 16 Dec 2016
5 min read
This is an old version, kept for reference only.

Go to latest version
This page was archived on 21 Dec 2015 with reason: Other (New version data-and-maps/indicators/air-pollution-by-ozone-2 was published)
Annual mean ozone concentrations by station type Modelled change in tropospheric ozone concentrations over Europe Selection of meteorological parameters that might increase under future climate change and their impact on ozone levels

Assessment versions

Published (reviewed and quality assured)
  • No published assessments


Justification for indicator selection

Ozone is a greenhouse gas, but ground level ozone is primarily an air pollutant, which is of high concern in Europe. Concentrations of ground-level ozone are determined by both precursor emissions and meteorological conditions, which also influence the transport of ozone and its precursors between continents. Ground-level ozone is highly reactive and therefore harmful to vegetation, materials and human health. Short-term, high-level exposure can cause breathing problems and lung diseases, trigger asthma, and reduce lung function. The estimated effects of excessive exposure to ozone (exceeding the threshold of 70 μg/m3) include about 20 000 premature deaths , and 14 000 respiratory hospital admissions every year in the EU25, and up to 108 million person-days with minor activity restrictions, respiratory medication use, cough or lower respiratory symptoms. Evidence of chronic effects (asthma and lung development) of long-term exposure to high ozone levels is still limited). There is a scarce evidence that high ozone levels can further increase mortality during heat waves. 

Scientific references

Indicator definition

  • Annual mean ozone concentrations by station type
  • Modelled change in tropospheric ozone concentrations over Europe
  • Selection of meteorological parameters that might increase under future climate change and their impact on ozone levels


  • µg/m³
  • % per decade

Policy context and targets

Context description

In April 2013 the European Commission presented the EU Adaptation Strategy Package ( This package consists of the EU Strategy on adaptation to climate change /* COM/2013/0216 final */ and a number of supporting documents. One of the objectives of the EU Adaptation Strategy is Better informed decision-making, which should occur through Bridging the knowledge gap and Further developing Climate-ADAPT as the ‘one-stop shop’ for adaptation information in Europe. Further objectives include Promoting action by Member States and Climate-proofing EU action: promoting adaptation in key vulnerable sectors. Many EU Member States have already taken action, such as by adopting national adaptation strategies, and several have also prepared action plans on climate change adaptation.

The European Commission and the European Environment Agency have developed the European Climate Adaptation Platform (Climate-ADAPT, to share knowledge on observed and projected climate change and its impacts on environmental and social systems and on human health; on relevant research; on EU, national and subnational adaptation strategies and plans; and on adaptation case studies.


No targets have been specified.

Related policy documents

  • Climate-ADAPT: Adaptation in EU policy sectors
    Overview of EU sector policies in which mainstreaming of adaptation to climate change is ongoing or explored
  • Climate-ADAPT: Country profiles
    Overview of activities of EEA member countries in preparing, developing and implementing adaptation strategies
  • DG CLIMA: Adaptation to climate change
    Adaptation means anticipating the adverse effects of climate change and taking appropriate action to prevent or minimise the damage they can cause, or taking advantage of opportunities that may arise. It has been shown that well planned, early adaptation action saves money and lives in the future. This web portal provides information on all adaptation activities of the European Commission.
  • EU Adaptation Strategy Package
    In April 2013, the European Commission adopted an EU strategy on adaptation to climate change, which has been welcomed by the EU Member States. The strategy aims to make Europe more climate-resilient. By taking a coherent approach and providing for improved coordination, it enhances the preparedness and capacity of all governance levels to respond to the impacts of climate change.

Key policy question

What are health effects of ozone exposure across Europe, and how are they changing?



Methodology for indicator calculation

Observations are shown from AirBase (The European air quality database). 

A three-dimensional Chemistry Transport Model was used to study the meteorologically induced interannual variability and trends in concentrations of surface ozone over Europe during 1958–2001.

Methodology for gap filling

Not applicable

Methodology references


Data specifications

EEA data references

External data references

Data sources in latest figures



Methodology uncertainty

Not applicable

Data sets uncertainty

Attribution of health effects to climate change is difficult due to the complexity of interactions, and potentially modifying effects of a range of other factors (such as land use changes, public health preparedness, and socio-economic conditions). Criteria for defining a climate-sensitive health impact are not always well identified and their detection sometimes relies on complex statistical or modelling studies (e.g. health impacts of heat waves). Furthermore, these criteria as well as the completeness and reliability of observations may differ between regions and/or institutions, and they may change over time. Data availability and quality is crucial in climate change and human health assessments, both for longer term changes in climate-sensitive health outcomes, and for health impacts of extreme events. The monitoring of climate-sensitive health effects is currently fragmentary and heterogeneous. All these factors make it difficult to identify significant trends in climate-sensitive health outcomes over time, and to compare them across regions. In the absence of reliable time series, more complex approaches are often used to assess the past, current or future impacts of climate change on human health.

Further information on uncertainties is provided in Section 1.7 of the EEA report on Climate change, impacts, and vulnerability in Europe 2012 (

Rationale uncertainty

No uncertainty has been specified

Further work

Short term work

Work specified here requires to be completed within 1 year from now.

Long term work

Work specified here will require more than 1 year (from now) to be completed.

General metadata

Responsibility and ownership

EEA Contact Info

User not found: gonzaal1


European Environment Agency (EEA)


Indicator code
CLIM 006
Version id: 2

Frequency of updates

Updates are scheduled every 4 years


DPSIR: Impact
Typology: Descriptive indicator (Type A - What is happening to the environment and to humans?)


Document Actions