Abstract
The results of rainwater analyses collected at five sampling sites within Kvarner Bay area are presented for the period 1984–1991. The samples were collected on a daily basis in open buckets thus representing bulk samples. Although measurements are referred to as wet deposition samples, they are actually an upper limit for the wet deposition. The rainwater was initially analysed for pH, sulphate and nitrate content, while during the period March 1990 — May 1991 the analyses were extended to major ion concentrations: hydrogen, sulphate, nitrate, chloride, ammonium, sodium, potassium, calcium and magnesium. The pH frequency distribution, pH medians and precipitation weighted average (PWA) concentrations of hydrogen, sulphate and nitrate are presented, as well as wet deposition rates of sulphur (as sulphate) and nitrogen (as nitrate). The dependence of hydrogen, sulphate and nitrate mean concentrations on wind directions and seasons for Site 1 is also given. The highest precipitation acidity is obtained at urban and industrial Site 1 (city of Rijeka) because of the local washout of the atmosphere and influence of dry deposition, and at remote Site 4 (Lake Vrana) due to long-range transport. The neutralizing potential of sea salt and soil dust is responsible for partial neutralization of rainwater at other sites. The influence of sea salt on chemical composition of rainwater is observed at all sites. The estimated wet deposition rates of sulphate and nitrate are close to the values reported for Southeast Europe. The wet deposition rate for ammonium ion at Site 1 is almost double comparative regional values.
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Alebic-Juretic, A. Precipitation chemistry within Kvarner Bay area, Northern Adriatic (Croatia), 1984–1991. Water Air Soil Pollut 78, 343–357 (1994). https://doi.org/10.1007/BF00483042
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DOI: https://doi.org/10.1007/BF00483042