Change search
ReferencesLink to record
Permanent link

Direct link
Declining ozone exposure of European vegetation under climate change and reduced precursor emissions
SMHI, Research Department, Air quality.
SMHI, Research Department, Air quality.ORCID iD: 0000-0002-2757-2864
Show others and affiliations
2014 (English)In: Biogeosciences, ISSN 1726-4170, E-ISSN 1726-4189, Vol. 11, no 19, 5269-5283 p.Article in journal (Refereed) Published
Abstract [en]

The impacts of changes in ozone precursor emissions as well as climate change on the future ozone exposure of the vegetation in Europe were investigated. The ozone exposure is expressed as AOT40 (Accumulated exposure Over a Threshold of 40 ppb O-3) as well as PODY (Phytotoxic Ozone Dose above a threshold Y). A new method is suggested to express how the length of the period during the year when coniferous and evergreen trees are sensitive to ozone might be affected by climate change. Ozone precursor emission changes from the RCP4.5 scenario were combined with climate simulations based on the IPCC SRES A1B scenario and used as input to the Eulerian Chemistry Transport Model MATCH from which projections of ozone concentrations were derived. The ozone exposure of vegetation over Europe expressed as AOT40 was projected to be substantially reduced between the periods 1990-2009 and 2040-2059 to levels which are well below critical levels used for vegetation in the EU directive 2008/50/EC as well as for crops and forests used in the LRTAP convention, despite that the future climate resulted in prolonged yearly ozone sensitive periods. The reduction in AOT40 was mainly driven by the emission reductions, not changes in the climate. For the toxicologically more relevant POD1 index the projected reductions were smaller, but still significant. The values for POD1 for the time period 2040-2059 were not projected to decrease to levels which are below critical levels for forest trees, represented by Norway spruce. This study shows that substantial reductions of ozone precursor emissions have the potential to strongly reduce the future risk for ozone effects on the European vegetation, even if concurrent climate change promotes ozone formation.

Place, publisher, year, edition, pages
2014. Vol. 11, no 19, 5269-5283 p.
National Category
Environmental Sciences
Research subject
URN: urn:nbn:se:smhi:diva-137DOI: 10.5194/bg-11-5269-2014ISI: 000344153200001OAI: diva2:801352
Available from: 2015-04-09 Created: 2015-03-26 Last updated: 2015-04-09Bibliographically approved

Open Access in DiVA

fulltext(2762 kB)47 downloads
File information
File name FULLTEXT01.pdfFile size 2762 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Search in DiVA

By author/editor
Engardt, MagnuzLangner, Joakim
By organisation
Air quality
In the same journal
Environmental Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 47 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 46 hits
ReferencesLink to record
Permanent link

Direct link