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Dataset: Full Collection (Reference / Forecast Time) Dataset
Catalog: ds628.0 Japanese 55-year Reanalysis, Daily 3-Hourly and 6-Hourly Data/ds628.0 NCAR RDA - JRA-55: Japanese 55-year Reanalysis, Daily 3-Hourly and 6-Hourly Data/ds628.0 Aggregations/Diagnostic Fields/JRA-55 3-Hourly 1.25 Degree 2-Dimensional Instantaneous Diagnostic Fields
dataFormatGRIB-1
authorityedu.ucar.rda
featureTypeGRID
idaggregations/g/ds628.0/28/TwoD
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CdmrFeature Data Access Provides coordinate subsetting on remote CDM Feature Datasets, using ncstream.
WCS Data Access Supports access to geospatial data as 'coverages'.
WMS Data Access Supports access to georegistered map images from geoscience datasets.
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Godiva3 Browser
default_viewer.ipynb Jupyter Notebook The TDS default viewer attempts to plot any Variable contained in the Dataset.
Documentation
Keywords
Creators
Publishers
Geospatial Coverage
Time Coverage
Properties

Description:

  • summary: Two time dimensions: reference and forecast; full access to all GRIB records
  • Rights: Freely Available
  • summary: The Japan Meteorological Agency (JMA) conducted JRA-55, the second Japanese global atmospheric reanalysis project. It covers 55 years, extending back to 1958, coinciding with the establishment of the global radiosonde observing system. Compared to its predecessor, JRA-25, JRA-55 is based on a new data assimilation and prediction system (DA) that improves many deficiencies found in the first Japanese reanalysis. These improvements have come about by implementing higher spatial resolution (TL319L60), a new radiation scheme, four-dimensional variational data assimilation (4D-Var) with Variational Bias Correction (VarBC) for satellite radiances, and introduction of greenhouse gases with time varying concentrations. The entire JRA-55 production was completed in 2013, and thereafter will be continued on a real time basis.
  • summary: Specific early results of quality assessment of JRA-55 indicate that a large temperature bias in the lower stratosphere has been significantly reduced compared to JRA-25 through a combination of the new radiation scheme and application of VarBC (which also reduces unrealistic temperature variations). In addition, a dry land surface anomaly in the Amazon basin has been mitigated, and overall forecast scores are much improved over JRA-25.
  • summary: Most of the observational data employed in JRA-55 are those used in JRA-25. Additionally, newly reprocessed METEOSAT and GMS data were supplied by EUMETSAT and MSC/JMA respectively. Snow depth data over the United States, Russia and Mongolia were supplied by UCAR, RIHMI and IMH respectively.
  • summary: The Data Support Section (DSS) at NCAR has processed the 1.25 degree version of JRA-55 with the RDA (Research Data Archive) archiving and metadata system. The model resolution data has also been acquired, archived and processed as well, including transformation of the TL319L60 grid to a regular latitude-longitude Gaussian grid (320 latitudes by 640 longitudes, nominally 0.5625 degree). All RDA JRA-55 data is available for internet download, including complete subsetting and data format conversion services.
  • JRA-55: Japanese 55-year Reanalysis, Daily 3-Hourly and 6-Hourly Data
  • JRA-55: Japanese 55-year Reanalysis
  • Description of JRA-55 at the NCAR Climate Data Guide

Keywords:

  • : Numerical Weather Prediction
  • : Model data
  • : Reanalysis

Creators:

Publishers:

GeospatialCoverage:

  • Longitude: 0.0 to 358.75 Resolution=1.25 degrees_east
  • Latitude: -90.0 to 90.0 Resolution=1.25 degrees_north

TimeCoverage:

  • Start: 1957-12-31T21:00:00Z
  • End: 2023-03-01T00:00:00Z
  • Duration: 65.162 years

Properties:

  • Originating_or_generating_Center = Tokyo (RSMC), Japan Meteorological Agency
  • Originating_or_generating_Subcenter = Reanalysis project
  • GRIB_table_version = 0,200
  • Generating_process_or_model = Japanese 55-year Reanalysis (JRA-55)
  • file_format = GRIB-1
  • Conventions = CF-1.6
  • history = Read using CDM IOSP GribCollection v3
  • featureType = GRID
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