This meeting is being organized as a part of the activities related to the "Mathematics of Planet Earth 2013".The scientific themes of the Ramanujan Lectures by Prof. Majda will be modelling of wave phenomena in the tropics, study of convection and relations to clouds, and filtering or assimilation of chaotic signals in complex systems such as the atmosphere.The discussion meeting centred around these lectures will mainly cover the following topics:Mathematical theory of tropical meteorologyObservations and numerical simulations of these phenomenaRole of clouds and convection in the tropicsPrediction and data assimilation techniquesConvection in the tropics occurs across scales, from the scale of little eddies of a few mm or less to that of clouds to the planetary scale Walker and Hadley circulations. These scales continuously interact and exchange energy. Unlike in most other fluid mechanical phenomena, the energy transfer could be a two way process in the tropical atmosphere i.e. ene...