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| Monitoring the impact of sulphur with the Austrian Bioindicator Grid |
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In Austria, the impact of sulphur has been assessed since 1985 with the
help of the Austrian Bioindicator Grid on 760 sample plots with Picea abies
as the main tree species (90%). The annual sampling allows a precise
evaluation of the temporal and regional development of the impact of
sulphur on the basis of legal standards. Despite the reduction of SO2
emissions in Austria, the legal standard is still exceeded on 8% of the
plots. These plots are mainly located near large Austrian emittors, but
also in areas affected by transboundary sulphur emissions from
neighbouring countries. The present paper describes how the
Bioindicator Grid can be applied for the control of legal requirements
to enact effective clean air measures in Austria and take supportive
measures that reduce the impact of sulphur from emittors in
neighbouring countries. |
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