Modeling the impact of the urban land-use on the Indian Summer Monsoon precipitation

The urban areas can modify the local and regional climate through various processes. They can indeed modify the water cycle and precipitations, either through the modification of land-use, or through effects induced by the emissions of anthropogenic aerosols. The thermodynamical perturbations induced by the presence of urban land-use, including the urban heat island effect, are known to induce rainfall modification due to perturbation of the flow and enhancement of the convective activity. However, this impact has yet to be clarified in a large scale, highly energetic system like the Asian Monsoon system. Using the high resolution meso-scale atmospheric model Meso-NH, we investigated the impact of urban land-use on the precipitation during the Indian Summer Monsoon, including the influence on extreme events. The results of this study will be presented and discussed.