Date : 12-04-2017
Time : 16:00:00
Speaker : Dr. Amitava Guharay
Reader, Space and Atmospheric Sciences Division.
Area : DEAN'S OFFICE
Venue : K. R. Ramanathan Auditorium, PRL
Waves are one of the most dominant controlling agents of dynamics of the atmosphere. They are generally excited by disturbances in the lower atmosphere and propagate to higher altitudes. The most important feature of the waves is its property of transporting energy and momentum from the lower to the middle and upper atmosphere and thus control and modify large scale circulation and dynamical condition of the ambient atmosphere. Waves play as an important agent of dynamical coupling of various atmospheric regions. Most prominent waves having significant impact on global dynamics are categorized as gravity waves, tides and planetary waves. Atmospheric oscillations are generated by wave and mean flow interactions. In this presentation the characteristic features of these waves and oscillations will be discussed along with recent observations from various parts of the globe.