Dry deposition contribution to total deposition to urban and suburban coniferous stands

Abstract

The investigations of atmospheric deposition by the means of throughfall estimates were carried out in 2001-2004 in urban and suburban Scots pine (Pinus sylvestris L.) stands. Collection of bulk and throughfall deposition was performed on a monthly basis from April to November. The main aim of this study was to investigate dry deposition contribution to total deposition at differently exposed to local pollution source coniferous stands. Bulk and throughfall deposition of anions in suburbs exceeded of that in urban site. Our results show that dry deposition is the main reason leading to enrichment of throughfall in ions of anthropogenic provenance (SO42-, NO3-, Cl- and NH4+). Regression analysis revealed that the forest situated in the suburbs in the direction of the prevailing winds receive higher amounts of dry sulphur and nitrogen deposition than the forests growing in city territories