Numerical Analysis and Reconstruction of the Temperature Regime of the Lena River Segment

The data series from several gauging stations on the Lena River are considered. The difference of the water temperature between Kusur station and 200 kilometers downstream to the north Habarova station often becomes anomaly large during open water season (June-September). The analysis of the observational data is presented. The non-representativeness of measurements on Kusur station is supposed, reconstruction of the real temperature regime on the base of the statistical and deterministic modeling as well as the optimization tools is carried out.