JRA-55C: The Japanese 55-year Reanalysis Using Conventional Data Only
| DOI: 10.5065/D67H1GNZ
As a subset of the Japanese 55-year Reanalysis (JRA-55) project, the Meteorological Research Institute of the Japan Meteorological Agency has conducted a global atmospheric reanalysis that assimilates only conventional surface and upper air observations, with no use of satellite observations, using the same data assimilation system as the JRA-55. The project, named the JRA-55 Conventional (JRA-55C), aims to produce a more homogeneous dataset over a long period, unaffected by changes in historical satellite observing systems. The dataset is intended to be suitable for studies of climate change or multidecadal variability. The reanalysis period of JRA-55C is from November 1972 to December 2012. The JMA recommends the use of JRA-55 to extend JRA-55C back to January 1958.
The Data Support Section at NCAR has downloaded all JRA-55C data. The entire archive has been reorganized into single parameter time series, and model resolution data has been transformed to a regular Gaussian grid. The JRA-55C products are currently being made accessible to RDA registered users of JRA-55, and will appear incrementally via the Data Access tab.
When accessing the JRA data, you agree to the following Terms and Conditions:
a. Conditions of use
- Individual users must register their name, affiliation and email address with NCAR before access to datasets will be permitted.
- The source of the datasets should be duly acknowledged in scientific and technical papers, publications, press releases and other communications regarding the datasets. Example: The dataset used for this study is from the Japanese 55-year Reanalysis Using Conventional Data Only (JRA-55C) project carried out by the Japan Meteorological Agency (JMA).
- Individual users should provide JMA (email@example.com) with a copy of their scientific or technical papers, publications, press releases or other communications regarding these datasets.
- Although JMA has taken the utmost care in creating the datasets, it assumes no responsibility regarding their reliability. JMA is not responsible for any damage that may result from their use.
c. Intellectual property
- The intellectual property rights of the datasets belong exclusively to JMA.
The complete JMA and NCAR agreement for JRA-55 (and JRA-55C) may be viewed via the Documentation tab.
|Air Temperature||Atmospheric Stability||Brightness Temperature||Canopy Characteristics|
|Cloud Frequency||Cloud Liquid Water/Ice||Convergence||Dew Point Temperature|
|Evaporation||Evapotranspiration||Geopotential Height||Gravity Wave|
|Heat Flux||Heat Flux||Humidity||Hydrostatic Pressure|
|Ice Extent||Land Surface Temperature||Land Use/Land Cover Classification||Longwave Radiation|
|Maximum/Minimum Temperature||Potential Temperature||Precipitation Amount||Precipitation Rate|
|Runoff||Sea Level Pressure||Shortwave Radiation||Snow Depth|
|Snow Water Equivalent||Soil Moisture/Water Content||Soil Temperature||Streamfunctions|
|Surface Pressure||Surface Roughness||Surface Winds||Total Precipitable Water|
|Tropospheric Ozone||Upper Air Temperature||Upper Level Winds||Vegetation Species|
|Vertical Wind Velocity/Speed||Vorticity||Water Vapor|
Latitude Range: Southernmost=90S Northernmost=90N Detailed coverage information