Multiyear research of atmospheric deposition: case study at the Listvyanka monitoring station (Southern Pribaikalye, Russia)

摘要

Results of air surface aerosol and precipitation ion content studies done at the Listvyanka Station (Southern Pribaikalye)during 2000-2015 are discussed. The studies were performed by Limnological Institute, Siberian Branch of the RussianAcademy of Sciences (Irkutsk, Russia) in continuous monitoring mode. Peculiarities of seasonal and interannualvariability of aerosol and precipitation ion content are analyzed. A reduction of aerosol ion concentrations is observedsince 2000 to 2015, while no such reduction of ion concentrations is seen in precipitation. The mean annual pH value andnitrate content show a tendency to decrease with simultaneous growth of sulfate and ammonium concentrations. Aerosolion content changed in 2010-2015 as compared to the 1990’s. The change of aerosol and precipitation ion content isinduced by climate change (warming, growing rain and snowfall) in the Baikal Region as well as by shift of heat andpower plants emission components towards reduction of ash fraction and increase of acidulous gases.