Prof. Andrey Koval,
the Department of Atmospheric Physics, St. Petersburg University, Russia

Biography:

Andrey Koval, Doctor of Physical and Mathematical Sciences (PhD habil.), Professor of the Department of Atmospheric Physics at St. Petersburg University. His research interests include numerical modeling of the circulation of the middle and upper atmosphere, analysis of satellite and ground-based observations in order to study various aspects of atmospheric dynamics, including wave interactions of various scales. In 2021, at the age of 37, he performed PhD habilitation on the topic "Interactions of hydrodynamic waves in the middle and upper atmosphere". Winner of the St. Petersburg University Academic Council awards for publication activity and scientific achievements for young scientists. He has published more than 50 works in scientific journals, including a large number of articles in first quartile journals. Main achievements in recent years: Developed a method for calculating the residual meridional circulation (RMC) up to thermosphere heights based on the 3-dimensional nonlinear circulation model of the middle and upper atmosphere MUAM, performed RMC calculations at different stages of sudden stratospheric warming in the Northern and Southern Hemispheres, as well as at different phases of natural tropical oscillations (QBO/ENSO). Studied the features of propagation and reflection of planetary waves (PWs) at different levels of solar activity up to the thermosphere, demonstrated the effect of PW reflection in the lower thermosphere at high solar activity, leading to circulation changes in MLT area. Developed a new approach to diagnostics of nonlinear interactions of PWs, demonstrated the process of generation of secondary 16-day PW by internal atmospheric sources.