naa a22 4500 510750923 CHVBK 20180411083104.0 cr unu---uuuuu 180411e20131001xx s 000 0 eng 10.1007/s11270-013-1746-3 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1746-3 Thirty Years of Chemical Changes in Alpine Acid-Sensitive Lakes in the Alps [Elektronische Daten] [Michela Rogora, Luca Colombo, Fabio Lepori, Aldo Marchetto, Sandra Steingruber, Ombretta Tornimbeni] 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. Springer Science+Business Media Dordrecht, 2013 Mountain lakes nationallicence Atmospheric deposition nationallicence Recovery nationallicence Nitrogen nationallicence Climate change nationallicence Rogora Michela CNR Institute of Ecosystem Study, I-28922, Verbania, Pallanza, Italy aut Colombo Luca University of Applied Sciences and Arts of Southern Switzerland (SUPSI), CH-6952, Canobbio, Switzerland aut Lepori Fabio University of Applied Sciences and Arts of Southern Switzerland (SUPSI), CH-6952, Canobbio, Switzerland aut Marchetto Aldo CNR Institute of Ecosystem Study, I-28922, Verbania, Pallanza, Italy aut Steingruber Sandra SPAAS Ufficio dell'aria, del clima e delle energie rinnovabili, CH-6501, Bellinzona, Switzerland aut Tornimbeni Ombretta CNR Institute of Ecosystem Study, I-28922, Verbania, Pallanza, Italy aut Water, Air, & Soil Pollution Springer Netherlands 224/10(2013-10-01), 1-20 0049-6979 224:10<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1746-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1746-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rogora Michela CNR Institute of Ecosystem Study, I-28922, Verbania, Pallanza, Italy aut NATIONALLICENCE 700 1- Colombo Luca University of Applied Sciences and Arts of Southern Switzerland (SUPSI), CH-6952, Canobbio, Switzerland aut NATIONALLICENCE 700 1- Lepori Fabio University of Applied Sciences and Arts of Southern Switzerland (SUPSI), CH-6952, Canobbio, Switzerland aut NATIONALLICENCE 700 1- Marchetto Aldo CNR Institute of Ecosystem Study, I-28922, Verbania, Pallanza, Italy aut NATIONALLICENCE 700 1- Steingruber Sandra SPAAS Ufficio dell'aria, del clima e delle energie rinnovabili, CH-6501, Bellinzona, Switzerland aut NATIONALLICENCE 700 1- Tornimbeni Ombretta CNR Institute of Ecosystem Study, I-28922, Verbania, Pallanza, Italy aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/10(2013-10-01), 1-20 0049-6979 224:10<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer