DATA SETSThe ocean is largely unknown. It is sounded and measured by a growing number of scientist, institutions, and research centers deploying a vast apparatus of remote-sensing satellites, buoys, fixed stations, high-resolution bathymetric sonar measurements, radar beams, lidar scans, GPS, automatic identification systems for vessels, complex mathematical models, and direct observations. The data they collect is often local and partial, and complex operations are undertaken to synchronize and normalize data, make it inter-operative, and increase availability to growing communities of researchers. The vast machine of climate change science is improving at enormous speed, and yet, data is often unavailable on a global scale, is not continuous, the data collections themselves are often incomplete, and it is difficult to access—even when it is available as part of scientific publications, it is often published in sites known only to experts.