Space missions have provided a wealth of data on the atmospheres and aeronomy of terrestrial planets,
from the lower layers up to the external envelopes in direct contact with the solar wind. An emerging finding stemming from the last few years’ of work by the scientific community is the evidence that the atmospheres behaves as
a single coherent system with complex couplings between layers.

This session solicits contributions that provide insight into the
processes at work (chemistry, energetics, dynamics, electricity, escape etc...)on terrestrial planets Venus, Mars, Titan and into the coupling between the lower/middle and upper atmospheres. Contributions based on analysis of recent spacecraft and ground-based observations, comparative planetology studies, numerical modelling and relevant laboratory investigations are particularly welcome. The session will consist of oral talks, both invited and contributed, and posters.