Abstract
The purpose of the monitoring programme is to quantify sulphur and nitrogen deposition to forests, and to illustrate possible acidification of the soil. Deposition is investigated as precipitation studies in open field areas and as throughfall. Soil water chemistry in the forest stands is used as indicator of soil conditions. This report concerns the hydrological year from October 1993 through September 1994 at 41 locations in six counties in central Sweden. Average pH in precipitation were 4.4-4.5. Deposition of sulphur exceeded target loads for this part of Sweden. The sulphur deposition varied between 4 and 14 kg per hectare and year, was lower in pine forests than in spruce forests, lower in northern parts of Vaermland, and highest in the county of Stockholm. Nitrogen measurements indicate that deposition of nitrogen exceeded target loads nearly everywhere, except in northern Vaermland. They also indicate extensive biosorption of nitrogen in the tree canopies. Deposition of nitrogen in the eastern parts was higher than in the western parts of the investigated area. Increased deposition of sulphur has been observed during this hydrological year compared to previous monitoring years, in all counties but Vaermland. This is probably due to meteorological conditions. Calculated strong acid input
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Citation Formats
Hallgren Larsson, E, Sjoeberg, K, and Westling, O.
Air pollutants in central Sweden. Deposition, concentrations and effects. October 1993 - September 1994; Luftfoeroreningar i mellersta Sverige. Nedfall, halter och effekter oktober 1993 - september 1994.
Sweden: N. p.,
1995.
Web.
Hallgren Larsson, E, Sjoeberg, K, & Westling, O.
Air pollutants in central Sweden. Deposition, concentrations and effects. October 1993 - September 1994; Luftfoeroreningar i mellersta Sverige. Nedfall, halter och effekter oktober 1993 - september 1994.
Sweden.
Hallgren Larsson, E, Sjoeberg, K, and Westling, O.
1995.
"Air pollutants in central Sweden. Deposition, concentrations and effects. October 1993 - September 1994; Luftfoeroreningar i mellersta Sverige. Nedfall, halter och effekter oktober 1993 - september 1994."
Sweden.
@misc{etde_94580,
title = {Air pollutants in central Sweden. Deposition, concentrations and effects. October 1993 - September 1994; Luftfoeroreningar i mellersta Sverige. Nedfall, halter och effekter oktober 1993 - september 1994}
author = {Hallgren Larsson, E, Sjoeberg, K, and Westling, O}
abstractNote = {The purpose of the monitoring programme is to quantify sulphur and nitrogen deposition to forests, and to illustrate possible acidification of the soil. Deposition is investigated as precipitation studies in open field areas and as throughfall. Soil water chemistry in the forest stands is used as indicator of soil conditions. This report concerns the hydrological year from October 1993 through September 1994 at 41 locations in six counties in central Sweden. Average pH in precipitation were 4.4-4.5. Deposition of sulphur exceeded target loads for this part of Sweden. The sulphur deposition varied between 4 and 14 kg per hectare and year, was lower in pine forests than in spruce forests, lower in northern parts of Vaermland, and highest in the county of Stockholm. Nitrogen measurements indicate that deposition of nitrogen exceeded target loads nearly everywhere, except in northern Vaermland. They also indicate extensive biosorption of nitrogen in the tree canopies. Deposition of nitrogen in the eastern parts was higher than in the western parts of the investigated area. Increased deposition of sulphur has been observed during this hydrological year compared to previous monitoring years, in all counties but Vaermland. This is probably due to meteorological conditions. Calculated strong acid input to the forest plots indicates twice the total load of hydrogen ions than measured throughfall deposition. Acidified soil waters (pH 4.3-4.6) have mainly been found in central parts of Oerebro and at cape Vaermlandsnaes in lake Vaenern. Concentrations of nitrogen have been low, indicating effective biosorption of nitrogen. 14 refs, 41 figs, 9 tabs}
place = {Sweden}
year = {1995}
month = {May}
}
title = {Air pollutants in central Sweden. Deposition, concentrations and effects. October 1993 - September 1994; Luftfoeroreningar i mellersta Sverige. Nedfall, halter och effekter oktober 1993 - september 1994}
author = {Hallgren Larsson, E, Sjoeberg, K, and Westling, O}
abstractNote = {The purpose of the monitoring programme is to quantify sulphur and nitrogen deposition to forests, and to illustrate possible acidification of the soil. Deposition is investigated as precipitation studies in open field areas and as throughfall. Soil water chemistry in the forest stands is used as indicator of soil conditions. This report concerns the hydrological year from October 1993 through September 1994 at 41 locations in six counties in central Sweden. Average pH in precipitation were 4.4-4.5. Deposition of sulphur exceeded target loads for this part of Sweden. The sulphur deposition varied between 4 and 14 kg per hectare and year, was lower in pine forests than in spruce forests, lower in northern parts of Vaermland, and highest in the county of Stockholm. Nitrogen measurements indicate that deposition of nitrogen exceeded target loads nearly everywhere, except in northern Vaermland. They also indicate extensive biosorption of nitrogen in the tree canopies. Deposition of nitrogen in the eastern parts was higher than in the western parts of the investigated area. Increased deposition of sulphur has been observed during this hydrological year compared to previous monitoring years, in all counties but Vaermland. This is probably due to meteorological conditions. Calculated strong acid input to the forest plots indicates twice the total load of hydrogen ions than measured throughfall deposition. Acidified soil waters (pH 4.3-4.6) have mainly been found in central parts of Oerebro and at cape Vaermlandsnaes in lake Vaenern. Concentrations of nitrogen have been low, indicating effective biosorption of nitrogen. 14 refs, 41 figs, 9 tabs}
place = {Sweden}
year = {1995}
month = {May}
}