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5.5 WMO activities on the Network Common Data Format (NetCDF) and WMO extension of the NetCDF Climate and Forecast (CF) Metadata Conventions. (10 minutes) (draft).
Summary provided to meeting organisers:
Dr Berry reported on activities within the WMO related to representation of data using the netCDF format and it’s use within the WMO context, noting:
netCDF is a format that is very flexible, well supported and widely used within the academic and research environments, particularly in the oceanographic, meteorological and climate communities;
the great flexibility and degrees of freedom offered by the netCDF format are both a benefit but also a weakness from an operational view point;
this issue has long been recognized, with different standards and conventions developed to improve interoperability of data, notably the Climate and Forecast (CF) metadata conventions developed within the climate modelling community;
the CF conventions primarily make recommendations on use of metadata elements and a common naming convention rather than specifying mandatory elements
using the CF conventions as a foundation, the WMO Task-Team on CFNetCDF has developed an extension of the CF conventions for using netCDF in an operational context, extending the conventions by: specifying mandatory rather than optional elements; the introduction of a WMO namespace; and the development of 2 example profiles / templates for sharing data on the WIS2.0;
the WMO-CF extension and templates were approved for experimental use following InfCom, with a WIS2.0 demonstration project now underway sharing data using netCDF;
this work could form a mechanism for sharing climate data, both model / gridded values and observations, in netCDF using the WIS2.0 infrastructure.
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6.2.1 Metadata requirements to enable WIS infrastructure. (Tom) confirmed
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