Our research focuses on understanding the interaction of tropical rainforests with the atmosphere on multiple spatial and temporal scales, particularly the effect of deforestation and climate change on the hydrological cycle and the development of clouds, and the feedbacks in the climate system. On the macro scale, this involves looking at how water vapor released by the rainforest is transported thousands of kilometers promoting rain along the way; while on the micro scale, it involves cloud-aerosol interactions and how anthropogenic emissions modify these interactions. To understand the underlying physical mechanisms, we combine models (with different levels of physical details) and observations (from ground sensors, aircrafts and satellites).