Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Thirty years of chemical changes in apine acid-sensitive lakes in the Alps |
| Abstract | The subalpine and alpine areas in North-Western Italy and Southern Switzerland (Canton Ticino) receive high deposition of atmospheric pollutants transported from emission sources in the Po Valley. Long-term studies on high-altitude lakes in these areas indicate widespread recovery from acidification, even though most of them are still substantially affected, especially by deposition of nitrogen compounds. We analysed long-term trends of the major chemical compounds in a sample (n=41) of high-altitude lakes, both at the site and regional levels, with the aim to assess the response of water chemistry to changes in atmospheric deposition and climate. These lakes have been studied since the early 1980s in the context of research programmes on acidification and atmospheric pollution. The significant decrease of sulfate and acidity in atmospheric deposition led to acidification recovery in the majority of the lakes. However, some lakes are still acidic or show a high sensitivity to acidification. This sensitivity is particularly evident at the snowmelt, when alkalinity is still fully depleted in some lakes. At present, nitrate is the dominant acidifying agent in the studied lakes, due to the high input of nitrogen compounds from atmospheric deposition. Our study also demonstrated that climatic factors interact with atmospheric deposition affecting the long-term changes in lake water. |
| Source | Water, air and soil pollution (Print) 224 (10), pp. 1746–1765 |
| Keywords | Mountain lakesAtmospheric depositionRecoveryNitrogenClimate change |
| Journal | Water, air and soil pollution (Print) |
| Editor | Kluwer Academic Publishers, Dordrecht, Paesi Bassi |
| Year | 2013 |
| Type | Articolo in rivista |
| DOI | 10.1007/s11270-013-1746-3 |
| Authors | Michela Rogora; Luca Colombo; Fabio Lepori; Aldo Marchetto; Sandra Steingruber; Ombretta Tornimbeni |
| Text | 287998 2013 10.1007/s11270 013 1746 3 ISI Web of Science WOS 000326051700025 Mountain lakes Atmospheric deposition Recovery Nitrogen Climate change Thirty years of chemical changes in apine acid sensitive lakes in the Alps Michela Rogora; Luca Colombo; Fabio Lepori; Aldo Marchetto; Sandra Steingruber; Ombretta Tornimbeni Michela Rogora; Aldo Marchetto; Ombretta Tornimbeni CNR ISE VB; Luca Colombo; Fabio Lepori University of Applied Sciences of Southern Switzerland, Canobbio, Switzerland; Sandra Steingruber SPAA, Lab. Studi Ambientali, Paradiso Lugano, Switzerland The subalpine and alpine areas in North Western Italy and Southern Switzerland Canton Ticino receive high deposition of atmospheric pollutants transported from emission sources in the Po Valley. Long term studies on high altitude lakes in these areas indicate widespread recovery from acidification, even though most of them are still substantially affected, especially by deposition of nitrogen compounds. We analysed long term trends of the major chemical compounds in a sample n=41 of high altitude lakes, both at the site and regional levels, with the aim to assess the response of water chemistry to changes in atmospheric deposition and climate. These lakes have been studied since the early 1980s in the context of research programmes on acidification and atmospheric pollution. The significant decrease of sulfate and acidity in atmospheric deposition led to acidification recovery in the majority of the lakes. However, some lakes are still acidic or show a high sensitivity to acidification. This sensitivity is particularly evident at the snowmelt, when alkalinity is still fully depleted in some lakes. At present, nitrate is the dominant acidifying agent in the studied lakes, due to the high input of nitrogen compounds from atmospheric deposition. Our study also demonstrated that climatic factors interact with atmospheric deposition affecting the long term changes in lake water. 224 Published version Articolo 2013_Water_Air_Soil_Pollut_24_1746.pdf Articolo in rivista Kluwer Academic Publishers 0049 6979 Water, air and soil pollution Print Water, air and soil pollution Print Water, air and soil pollution. Print Water air soil pollut. Print Water, air soil pollution Print TORNIMBENI OMBRETTA aldo.marchetto MARCHETTO ALDO michela.rogora ROGORA MICHELA TA.P02.014.002 Impatto dei cambiamenti globali sugli ecosistemi acquatici |