Abstract
The chemistry of wet only and bulk depositions collected weekly at Pallanza from May, 1984 to December, 1986 is compared and discussed in relation to the composition of dust fall. The comparison shows a very good agreement between pH values (volume weighted mean values of 4.35 and 4.36, respectively, for wet only and bulk samples) and differences between 6 and 12% for ammonium, sulphate, nitrate, and Na. For Ca, Mg, and K the difference range is 30 to 50%. The amount of precipitation over Pallanza (mean value 1951–1985,1709 mm), together with the solute concentrations in atmospheric deposition, mean that there is high bulk deposition of acidifing substances. The values found during the study period were 76, 93, 143, and 81 meq m2 yr−1 for H+, ammonium, sulphate, and nitrate, respectively.
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Mosello, R., Marchetto, A. & Tartari, G.A. Bulk and wet atmospheric deposition chemistry at pallanza (N. Italy). Water Air Soil Pollut 42, 137–151 (1988). https://doi.org/10.1007/BF00282397
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DOI: https://doi.org/10.1007/BF00282397