Example of how physical properties of disk evolve between 0.5 and 0.7 Myr at a radius of 10 AU. The gas temperature, abundance of water ice, and UV flux are measured at the disk mid-plane. The gas temperature and density, dust density, and flux high energy radiation stay constant during a single time step. These values are then adjusted to a new value at the end of the timestep before the chemical evolution moves onwards in time.