Abstract：
:Atmospheric deposition of the major elements was estimated from throughfall and bulk deposition measurements on 13 plots of the Swiss Long-Term Forest Ecosystem Research (LWF) between 1995 and 2001. Independent estimates of the wet and dry deposition of nitrogen (N) and sulfur (S) on these same plots were gained from combined simplified models. The highest deposition fluxes were measured at Novaggio (Southern Switzerland), exposed to heavy air pollution originating from the Po Plain, with throughfall fluxes averaging 29 kg ha(-1) a(-1) for N and 15 kg ha(-1) a(-1) for S. Low deposition fluxes were measured on the plots above 1800 m, with throughfall fluxes lower than 4.5 kg ha(-1) a(-1) for N and lower than 3 kg ha(-1) a(-1) for S. The wet deposition of N and S derived from bulk deposition was close to the modeled wet deposition, but the dry deposition derived from throughfall was significantly lower than the modeled dry deposition for both compounds. However, both the throughfall method and the model yielded total deposition estimates of N which exceeded the critical loads calculated on the basis of long-term mass balance considerations. These estimates were within or above the range of empirical critical loads except above 1800 m.
journal_name
Environ Monit Assessjournal_title
Environmental monitoring and assessmentauthors
Thimonier A,Schmitt M,Waldner P,Rihm Bdoi
10.1007/s10661-005-1605-9subject
Has Abstractpub_date
2005-05-01 00:00:00pages
81-118issue
1-3eissn
0167-6369issn
1573-2959journal_volume
104pub_type
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