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External Data Spec

JRA-55 (Japanese global atmospheric reanalysis project)

External Data Spec Published 15 Dec 2021
1 min read
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.
information.png Provider:
Japan Meteorological Agency (JMA)
information.png Dataset URL:
https://rda.ucar.edu/datasets/ds628.1/
information.png Other comments:

https://jra.kishou.go.jp/JRA-55/index_en.html

Related content

Produced figures

Figure Global (left) and European land (right) average near-surface temperatures relative to the pre-industrial period 1850-1900 Left chart: Global annual averages of near-surface temperature of land and ocean expressed as the anomaly relative to the pre-industrial period 1850-1900 according to the datasets used by the Copernicus Climate Change Service (C3S): ERA5 (C3S/ECMWF), JRA-55 (JMA), GISTEMPv4 (NASA), HadCRUT5 (Met Office Hadley Centre), NOAAGlobalTempv5 (NOAA) and Berkeley Earth. Right chart: European annual averages of near-surface temperature expressed as the anomaly relative to the pre-industrial period 1850-1900 according to the datasets used by the Copernicus Climate Change Service (C3S): ERA5 (C3S/ECMWF), JRA-55 (JMA), GISTEMPv4 (NASA), HadCRUT5 (Met Office Hadley Centre), NOAAGlobalTempv5 (NOAA) and Berkeley Earth.
Figure
Archived
Global (left) and European land (right) average near-surface temperatures anomalies relative to the pre-industrial period Left chart: Global annual averages of near-surface temperature of land and ocean expressed as the anomaly relative to the pre-industrial period 1850-1900 according to the datasets used by the Copernicus Climate Change Service (C3S): ERA5 (C3S/ECMWF), JRA-55 (JMA), GISTEMPv4 (NASA), HadCRUT5 (Met Office Hadley Centre), NOAAGlobalTempv5 (NOAA) and Berkeley Earth. Right chart: European annual averages of near-surface temperature expressed as the anomaly relative to the pre-industrial period 1850-1900 according to the datasets used by the Copernicus Climate Change Service (C3S): ERA5 (C3S/ECMWF), JRA-55 (JMA), GISTEMPv4 (NASA), HadCRUT5 (Met Office Hadley Centre), NOAAGlobalTempv5 (NOAA).

Permalinks

For references, please go to https://www.eea.europa.eu/data-and-maps/data/external/jra-55-japanese-global-atmospheric or scan the QR code.

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