Lightning ground flash patterns over Paris area between 1992 and 2003: Influence of pollution?

► First time lightning data used in France to investigate anthropogenic influence ► General lightning production more intense on Tuesday, Wednesday, and Thursday ► Lightning activity indicative of convection enhanced over Paris (UHI influence) ► Lightning favored downwind of Paris on Tuesday and Thursday (most worked days) ► High percentage of + CG downwind of Paris during weekend