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JRA-25 and JCDAS Data Management at NCAR: Climate Insights and Weather Context

Explore JRA-25 and JCDAS datasets at NCAR for accessing critical weather event insights within the climate context. Discover diverse data products from 1979 to 2007 in a user-friendly interface. Benefit from the collaboration between CISL and JMA staff for comprehensive data access. Visit dss.ucar.edu/news/jra25.html for more details.

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JRA-25 and JCDAS Data Management at NCAR: Climate Insights and Weather Context

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  1. JRA-25 and JCDAS at NCAR Data from Japanese 25-year Reanalysis (JRA-25) and the operational follow-on JMA Climate Data Assimilation System (JCDAS) are managed as a component of the CISL Research Data Archive (RDA) Chronology of events • October 2007, agreement reach to distribute JRA-25 from NCAR • January 2008, began data services to general users • Details at dss.ucar.edu/news/jra25.html • September, 2008 agreement to distribute JCDAS • Operational continuation of JRA-25 is critical for placing today’s weather events into the climate context JRA-25/JCDAS adds to the suite of major reanalyses in the RDA • E.g. ECMWF ERA-40, NCEP/NCAR Reanalysis

  2. Features of JRA-25/JCDAS at NCAR • All data users are registered and must agree to JMA’s ‘Condition of Use’ • Prepared to share user registration metrics with JMA enabling a combined worldwide dataset impact assessment • Currently, about 317 registered users

  3. Access to JRA-25/JCDAS at NCAR All data available through web/RDA portal and NCAR MSS, 11 TB • Available dates, 1979 though 2007 • 23 different data products • 4 x daily, GRIB1 format • Monthly mean, netCDF (NCAR derived from binary) format Excellent cooperation between members of CISL and JMA staff allows comprehensive access to JRA-25/JCDAS products at NCAR

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