Yu. D. Resnyanskii was born on July 27, 1948 in Dzerzhinskoe settlement (Almaty oblast). In 1971, he graduated from the Leningrad Hydrometeorological Institute (nowadays, the Russian State Hydrometeorological University) majoring in “Oceanology”. In 1971–1972, he worked at the Astrakhan Hydrometeorological Observatory as an engineer and provided the methodological support of operation of the network of marine hydrometeorological stations. In 1972–1975, he took the postgraduate course in the Hydrometcentre of the USSR under the scientific supervision of professor P. S. Lineikin. In 1975 he defended the thesis “Density Structure of the Upper Ocean Layer and Methods for Its Computation” for a degree of PhD (Physics and Mathematics) majoring in “Geophysics (Marine Physics)”.

Having completed the postgraduate course, Yu. D. Resnyanskii started working in the Division for Marine Hydrological Forecasts of the Hydrometcentre of the USSR (Hydrometcentre of Russia since 1992). In 1986 he moved to the Division for Hydrodynamic Research and Forecasting and, after its reorganization in 1989, to the Division for Hydrodynamic Methods of Long-range Forecasting where he has been the head of the Laboratory for Modeling the Atmospheric Circulation Anomalies of this division since 1992 and the head of the division since 1994. He has a degree of a senior scientific officer.

In 2003, he defended the thesis “Mathematical Modeling of Upper Mixed Layer and Large-scale Ocean Dynamics” for a degree of Doctor of Science (Physics and Mathematics) majoring in “Physics of Atmosphere and Hydrosphere”.

The area of his scientific interest includes the mathematical modeling of the upper boundary layer and general ocean circulation, the analysis and assimilation of oceanographic data, operational oceanography, and large-scale ocean–atmosphere interaction.

Yu. D. Resnyanskii is a member of the Scientific and Dissertation boards of Hydrometcentre of Russia and a chairman of the institutional workshop on the modeling and forecasting of large-scale hydrometeorological processes and climate. He has more than 100 scientific publications in Russian and foreign journals.