Includes the temperature differences between surface and deep waters in the ocean that can be used for electricity generation through ocean thermal energy conversion (OTEC). Distributions are observations of the ocean temperature profile as a function of time and location as well as maps of ocean temperature climatology based on observations and theory. Assessments evaluate technologies, locations, profitability, and risk of OTEC energy generation. Predictions are the results of models or projections of future OTEC energy potential, effects, and risks; these data include predicted changes due to economic, regulatory, technological, and environmental changes.