The Advanced Cooperative Arctic Data and Information Service (ACADIS) is the continuation and expansion of CADIS, or Advanced CADIS. ACADIS is a joint effort between the National Snow and Ice Data Center (NSIDC), the National Center for Atmospheric Research (NCAR), and Unidata to manage the diverse data needs of the Arctic research community supported by the National Science Foundation (NSF) Office of Polar Programs (OPP). This includes, but is not limited to, projects funded under the Arctic Observing Network (AON), Arctic System Sciences, Arctic Natural Sciences, and the Arctic Social Sciences Program. ACADIS represents an evolution of the CADIS that focused on the AON community. The National Science Foundations Office of Polar Programs Arctic Section (ARC) supports ACADIS to provide data management support for investigators funded under NSF/OPP/ARC.