The Observation Expert User (work package 2) is the contact point for all observation related issues within the project.
Evaluation within the second phase of HD(CP)² will be science focused, i.e., oriented around the specific scientific themes being developed by the science teams. An overarching evaluation (work package 5) has been added in the O project to perform baseline evaluations that will guide routine model diagnostics and run-time error checking, provide context for more specific model evaluation in the science teams, and help assemble an overall picture of the quality of the centrally performed simulations within HD(CP)².
The data archive for observational data, built up in the first phase, is a basis for a new culture of storing, sharing, and using observational data in atmospheric science. By the high level of standardization, the combination of different servers (THREDDS-technology), and the usage of one web portal as one central entry point, a data archive is provided which is as easy to use as possible. Combined with the long-term storage of the data sets in the CERA data base there is sustainable infrastructure for observation data archiving generated, which is absolutely new in Germany.
The Observation Expert User is responsible for the scientific coordination of the data archive and its web portal, and is the central point of contact for S and M with respect to observation issues. Coordinating the implementation of forward operators and defining the model output that corresponds to verifying observations will be a joined task with the model expert user.
The standardization of observation data for more transparency and an easier usage of the data for a wider range of researchers is an important and actual issue in the research community. Examples are the activities in projects, like ACTRIS, CLOUDNET, and in the satellite community. With the HD(CP)² Observation Data Product Standard a wide range of different instruments are catalogued and standardized, including remote sensing, in-situ, satellite observations, meteorological standard instruments as well as new scientific developments.
The figure gives an overview of the observational data in the in HD(CP)²: The underlying map of Germany shows the locations of the supersites, the GNSS (global navigation satellite system, blue dots) and ceilometer network (red dots) stations. Data from these very different stations are part of the HD(CP)² data portal. An example for a short term observations is A) the instrumentation during the HOPE campaign in Jülich. Examples for long term observations are B) satellite observations, C) Schematic instrumentation of Supersites and D) precipitation data from C-Band rain radar network of the German Weather Service.
The observational expert user is in charge of checking the data standard in order to provide quality-checked data in the portal. The technical evaluation is done with the collegues from the O module in Cologne.
The contact to other national and international data activities and partners is important for further development and the integration of other projects into the data archive. In 2014 the German Meteorological Service (DWD) has decided to provide all its climate data freely to the public. Following these lines, the Climate Data Center (CDC) as DWDs central portal to the distribution of climate data is currently revised and will be expanded significantly. This is a unique opportunity to explore the integration of the HD(CP)² data (in particular those provided by DWD) into the CDC and will provide a sustainable concept to ensure data service beyond the runtime of the HD(CP)² project.