The CliSAP-Integrated Climate Data Center (ICDC) allows easy access to climate relevant data from satellite remote sensing and in situ and other measurements in Earth System Sciences. These data are important to determine the status and the changes in the climate system. Additionally some relevant re-analysis data are included, which are modeled on the basis of observational data. ICDC cooperates with the "Zentrum für Nachhaltiges Forschungsdatenmanagement "https://www.fdr.uni-hamburg.de/ to publish observational data with a doi.