Main goals of my research are (i) to better understand physical and biogeochemical processes in the marine environments, and (ii) to better delineate the responses of the environment to climate forcing, in various temporal and spatial scales. To achieve these goals I utilize physical and chemical analysis methods, analyze large-scale ocean data, and develop conceptual models. I conduct my research in global- to regional-scales. I measure trace gases such as sulfur hexafluoride (SF6) and chlorofluorocarbons (CFCs) in the ocean at ultra-trace level as decadal-scale transient tracers of ocean circulation and ventilation to understand basin (i.e. Pacific Ocean) to regional (e.g. Gulf of Mexico) scale processes, and analyze basin-scale ocean data to detect decadal-scale ocean property changes in response to recent climate change.