Uma's research specialty is "Climate Variability." This research aims to understand how one component of the climate system impacts another (e.g. ocean and atmosphere) and attempts to explain why something happens. It is critical to understand the natural variability of the climate system in order to address climate change due to 'anthropogenic' forcing. She uses models, primarily Global Climate Models (GCMs), and observations in her research. One may see some interesting relationship in the observations and then use a model to try to understand the 'mechanism' behind this behavior. The climate is a very complex system and each bit of research we do serves to unravel a small piece of (or sometimes complicate) the climate puzzle.