My research seeks to understand linkages between climate records, atmospheric processes, and earth system modeling. As a result of the increase in computational power, the possibility now exists to use coupled complex earth-system models with appropriate spatial resolutions to understand the current climate processes and to allow past climate variations to be inferred from climate records. However, to take full advantage of climate models it is an imperative that we 1) understand and quantify the processes responsible for recording the state of the climate in the water isotopes, and 2) are able to simulate accurately the atmospheric hydrological cycle and its water isotopic composition. These goals represent the overarching goal of my research plan. My research on quantifying past climate variations allow me to place the current climate changes into a paleo-climate perspective. With a strong background in field instrumentation and earth-system modeling I bridge the gap between the modeling and observational scientific communities.