Naslov
Precipitation chemistry within Kvarner Bay Area, Northern Adriatic (Croatia), 1984-1991

Autori
Alebić-Juretić, Ana

Izvornik
Water, air and soil pollution (0049-6979) 78 (1994), 3-4; 343-357

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
precipitation ; bulk samples ; ionic composition ; sea salt contribution ; deposition ; trends

Sažetak
The results of rainwater analyses colected 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 Marsh 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 the remote Site 4 (Lake Vrana), due to long-range transport. The neutralizing potential of sea salt and soil dustis 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 nitrates are close to the values reported for Southeast Europe. The wet deposition rate for the ammonium ion at Site 1 is almost double comparative regional values.

Izvorni jezik
Engleski

Znanstvena područja
Geologija, Kemija

POVEZANOST RADA