Scientific publications

The thermal structure of the water is analyzed on the basis of observational data from a shallow lake located in northwestern Russia. The main features of temperature dynamics during the ice-covered period are described. It is determined that temporal changes of temperature had an oscillation character in the vicinity of the sediment-water interface. The main periods of fluctuations of water temperature make 5–6, 23–27 minutes, 1–3, 6–8, 11–12, 22–26 hours, 1,7–2,6, 3,1–4,1, 5–6, 13–15 days. The most part of identified periods fall within the scale of synoptic variations (5–10 days). The estimates of baroclinic seiche periods and temporal variations of the temperature in the thin bottom water layer show that the former may likely cause periodical variations of the temperature around the sediment-water interface in winter. The present study is supported by the Russian Academy of Sciences, The Russian Fund of Basic Research (project 07-05-00351).