Ladoga and Onega Hydrological Regimes and Their Variations |
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| Authors: | Golitsyn G S Efimova L K Mokhov I I Rumyantsev V A Somova N G Khon V Ch |
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| Institution: | (1) Oboukhov Institute of Atmospheric Physics, Russian Academy of Sciences, Pyzhevskii per. 3, Moscow, 109017, Russia;(2) Institute of Limnology, Russian Academy of Sciences, ul. Sevast'yanova 9, St. Petersburg, 196199, Russia |
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| Abstract: | The characteristics of the Ladoga and Onega hydrological regimes were analyzed, and the features of the annual and long-term variations in their water balance components were determined. The statistically significant positive trends of the average annual precipitation and evaporation in the Ladoga water area and the water inflow for the period of 1932–1995 were determined. The relative effect of the Ladoga water balance components on the formation of its level was studied. Spectral analysis of the components of this balance revealed, in particular, characteristic periods of about four years in the last decades. Based on the analysis, including wavelet, of the longer series of long-term variations in the Ladoga water level, it was found that the spectral structure pronouncedly changed in the period from 1859 to 1995. |
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