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 by precipitation studies in open field areas and as throughfall. Soilwater chemistry in the forest stands is used as indicator of soil conditions. Most locations were established during 1991. During 1995 and 1996 seven international permanent forest plots were established. This report concern the hydrological year from October 1995 through September 1996 for almost 20 locations in the four most northern counties of Sweden. The results are compared with previous years and other regions in Sweden. Less precipitation was measured in northern Sweden during the hydrological year 1995/1996, compared to averages for 1961-90. The drought was most pronounced during autumn and winter. As averages for 1995/96, temperatures were normal. A gradient with more acidic precipitation with higher concentrations of sulphur at coastal, than at inland, locations was found. Precipitation has been less acid, with lower concentrations of sulphur during 1995/96 compared to 1994/95. Deposition illustrates a gradient with larger loads of sulphur and nitrogen at coastal, than at inland locations. About 70 % of the precipitation reached the ground as through-fall. Sulphur and nitrogen
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Citation Formats
Hallgren-Larsson, E, and Westling, O.
Air pollution in northern Sweden. Deposition, levels and effects Oct 1995 - Sep 1996; Luftfoeroreningar i norra Sverige. Nedfall, halter och effekter oktober 1995 - september 1996.
Sweden: N. p.,
1997.
Web.
Hallgren-Larsson, E, & Westling, O.
Air pollution in northern Sweden. Deposition, levels and effects Oct 1995 - Sep 1996; Luftfoeroreningar i norra Sverige. Nedfall, halter och effekter oktober 1995 - september 1996.
Sweden.
Hallgren-Larsson, E, and Westling, O.
1997.
"Air pollution in northern Sweden. Deposition, levels and effects Oct 1995 - Sep 1996; Luftfoeroreningar i norra Sverige. Nedfall, halter och effekter oktober 1995 - september 1996."
Sweden.
@misc{etde_524162,
title = {Air pollution in northern Sweden. Deposition, levels and effects Oct 1995 - Sep 1996; Luftfoeroreningar i norra Sverige. Nedfall, halter och effekter oktober 1995 - september 1996}
author = {Hallgren-Larsson, E, 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 by precipitation studies in open field areas and as throughfall. Soilwater chemistry in the forest stands is used as indicator of soil conditions. Most locations were established during 1991. During 1995 and 1996 seven international permanent forest plots were established. This report concern the hydrological year from October 1995 through September 1996 for almost 20 locations in the four most northern counties of Sweden. The results are compared with previous years and other regions in Sweden. Less precipitation was measured in northern Sweden during the hydrological year 1995/1996, compared to averages for 1961-90. The drought was most pronounced during autumn and winter. As averages for 1995/96, temperatures were normal. A gradient with more acidic precipitation with higher concentrations of sulphur at coastal, than at inland, locations was found. Precipitation has been less acid, with lower concentrations of sulphur during 1995/96 compared to 1994/95. Deposition illustrates a gradient with larger loads of sulphur and nitrogen at coastal, than at inland locations. About 70 % of the precipitation reached the ground as through-fall. Sulphur and nitrogen deposition were larger in southern than in northern Sweden. The most acidified soil solutions (pH 4,5-4,6) with highest concentrations of aluminium were found at coastal locations outside Luleaa and Umeaa. One contributing factor might be a natural occurrence of higher sulphur levels in the soil. At most of the other locations pH-values were between 5,2 and 6,5. A significant trend towards diminished amounts of the micro nutrient manganese were found in soil solution from half of the locations. Lowered pH-values and higher concentrations of aluminium were found at many locations, indicating a continuing acidification process.}
place = {Sweden}
year = {1997}
month = {Jun}
}
title = {Air pollution in northern Sweden. Deposition, levels and effects Oct 1995 - Sep 1996; Luftfoeroreningar i norra Sverige. Nedfall, halter och effekter oktober 1995 - september 1996}
author = {Hallgren-Larsson, E, 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 by precipitation studies in open field areas and as throughfall. Soilwater chemistry in the forest stands is used as indicator of soil conditions. Most locations were established during 1991. During 1995 and 1996 seven international permanent forest plots were established. This report concern the hydrological year from October 1995 through September 1996 for almost 20 locations in the four most northern counties of Sweden. The results are compared with previous years and other regions in Sweden. Less precipitation was measured in northern Sweden during the hydrological year 1995/1996, compared to averages for 1961-90. The drought was most pronounced during autumn and winter. As averages for 1995/96, temperatures were normal. A gradient with more acidic precipitation with higher concentrations of sulphur at coastal, than at inland, locations was found. Precipitation has been less acid, with lower concentrations of sulphur during 1995/96 compared to 1994/95. Deposition illustrates a gradient with larger loads of sulphur and nitrogen at coastal, than at inland locations. About 70 % of the precipitation reached the ground as through-fall. Sulphur and nitrogen deposition were larger in southern than in northern Sweden. The most acidified soil solutions (pH 4,5-4,6) with highest concentrations of aluminium were found at coastal locations outside Luleaa and Umeaa. One contributing factor might be a natural occurrence of higher sulphur levels in the soil. At most of the other locations pH-values were between 5,2 and 6,5. A significant trend towards diminished amounts of the micro nutrient manganese were found in soil solution from half of the locations. Lowered pH-values and higher concentrations of aluminium were found at many locations, indicating a continuing acidification process.}
place = {Sweden}
year = {1997}
month = {Jun}
}