Abstract
The data at DKRZ are separated into data produced by climate models and data from observations. The local climate data archive contains 90% model data and 10% observational data. The basic data access problems are correlated with existing storage limitations. Data are preferably stored in the directories of the operating system. The raw data files are stored in the mass storage archive on sequential storage devices. The basic idea to realize the access requirements, searching the metadata catalogue, data extraction, searching climate data, and standard operations on the data, is to implement a climate database system including a graphical user interface. CERA, the Climate and Environmental Data Retrieval and Archiving system, consists of three major parts, the data model, the climate data hierarchy and the climate data processing.
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