Analyses of NOx and wet depositions at Mühleggerkböpfl, North Tyrolean Limestone Alps.
The intensive investigation site 'Mühleggerkopfl' in the North Tyrolean Limestone Alps can be classified as a clean-air area site. The mean concentrations of NOx are far below the effect-related limit value of the WHO (30 microg NOx m(-3)). The gravitational depositions in the open field (bulk deposition) ranged from 10.8 to 14.7 kg N ha(-1) a(-1) (throughfall: 11.3 to 12.3 kg N ha(-1) a(-1)) in the measuring years 1998 to 2000. Compared to these data, depositions in other forested areas of the Austrian Alps amounted to up to 30 kg N ha(-1) a(-1). The gravitational depositions (bulk deposition) alone--without considering dry and occult deposition slightly exceeded the lower limit of Critical Loads for coniferous and deciduous forests (>10 kg N ha(-1) a(-1)), but were below the Critical Loads for calcareous forests (15-20 kg N ha(-1) a(-1)).
Smidt
Stefan
S
Forstliche Bundesversuchsanstalt Wien, Institut für Immissionsforschung und Forstchemie, Seckendorff Gudent Weg 8, A-1130 Vienna, Austria. stefan.smidt@fbva.bmlf.gv.at
D000531:Altitude; D001317:Austria; D002119:Calcium Carbonate / Q000737:chemistry*; D004784:Environmental Monitoring; D055593:Geological Phenomena; D005844:Geology; D009589:Nitrogen Oxides / Q000032:analysis* / Q000737:chemistry; D011891:Rain; D014197:Trees
D009589:Nitrogen Oxides; D002119:Calcium Carbonate