Open AccessPluriannual evolution of the hydrochemistry of two Alpine lakes (Lake Paione Inferiore and Lake Paione Superiore, Ossola Valley) in relation to atmospheric loads.
Author(s) -
Rosario Mosello,
Aldo Marchetto,
Angela Boggero,
Maria Cristina Brizzio,
Gabriele Tartari,
Michela Rogora
Publication year - 1999
Publication title -
journal of limnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.465
H-Index - 44
eISSN - 1723-8633
pISSN - 1129-5767
DOI - 10.4081/jlimnol.1999.42
Subject(s) - alkalinity , nitrate , deposition (geology) , hydrology (agriculture) , environmental science , watershed , montane ecology , acid deposition , ammonium , pollutant , atmosphere (unit) , ecology , geology , geomorphology , geography , soil water , soil science , chemistry , meteorology , sediment , geotechnical engineering , organic chemistry , machine learning , computer science , biology
Lakes Paione Inferiore and Paione Superiore (LPI, LPS) are extremely sensitive to acidification, so they are useful as indicators in studying changes in atmospheric pollutant fluxes on waterbodies. Regular trends observed in the last 3-4 years cannot merely be a consequence of seasonal or interannual variations. Increasing pH and alkalinity are mainly driven by a decrease in acidic inputs from the atmosphere, which have been halved over the last 10 years. This trend of atmospheric deposition chemistry has emerged in several sampling stations in the subalpine and Alpine area, in the watershed of Lake Maggiore. The decrease in deposition acidity is mainly related to a decrease in sulphate, while nitrate and ammonium deposition is still high, resulting in high nitrate concentrations in lake waters