TY JOUR TI Evolution of Hydrodynamic Parameters of an Ellipsoidal Vortex in a Baroclinic Background Flow KW ellipsoidal vortex KW vortex lifetime KW critical shear KW vortex energy KW Rossby number JO Russian Journal of Earth Sciences AU Harutyunyan, D.A. AU Zhmur, V.V. PY 2025 IS 25 PB Geophysical Center of the Russian Academy of Sciences