TY JOUR TI Tracking the formation of the gradient part of the southeastern Baltic Sea cold intermediate layer KW Cold intermediate layer KW vertical stratification KW basin-scale exchange KW thermohaline structure KW the Baltic Sea KW Lagrangian transport JO Russian Journal of Earth Sciences AU Stepanova, N.. AU Mizyuk, A.. PY 2020 IS 20 PB Geophysical Center of the Russian Academy of Sciences