Ozone risk for vegetation in the future climate of Europe based on stomatal ozone uptake calculations
Författare
Summary, in English
The negative impacts of surface ozone (O(3)) on vegetation are determined by external exposure, leaf gas exchange and plant antioxidant defence capacity, all dependent on climate and CO(2) concentrations. In this study the influence of climate change on simulated stomatal O(3) uptake of a generic crop and a generic deciduous tree at ten European sites was investigated, using the LRTAP Mapping Manual stomatal flux model. O(3) concentrations are calculated by a chemistry transport model (MATCH) for three 30-yr time-windows (1961-1990, 2021-2050, 2071-2100), with constant precursor emissions and meteorology from a regional climate model (RCA3). Despite substantially increased modelled future O(3) concentrations in central and southern Europe, the flux-based risk for O(3) damage to vegetation is predicted to remain unchanged or decrease at most sites, mainly as a result of projected reductions in stomatal conductance under rising CO(2) concentrations. Drier conditions in southern Europe are also important for this result. At northern latitudes, the current parameterisation of the stomatal conductance model suggest O(3) uptake to be mainly limited by temperature. This study demonstrates the importance of accounting for the influences by climate and CO(2) on stomatal O(3) uptake, and of developing their representation in models, for risk assessment involving climate change.
Publiceringsår
2011
Språk
Engelska
Sidor
174-187
Publikation/Tidskrift/Serie
Tellus. Series A: Dynamic Meteorology and Oceanography
Volym
63
Issue
1
Länkar
Dokumenttyp
Artikel i tidskrift
Förlag
Wiley-Blackwell
Ämne
- Earth and Related Environmental Sciences
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 1600-0870