JMA is currently conducting the Japanese Reanalysis for Three Quarters of a Century (JRA-3Q), which covers the period from September 1947 onward to extend the current period of data coverage and improve the quality of long-term reanalysis. The project involves a sophisticated data assimilation system (based on the operational set-up as of December 2018) incorporating development results from the operational NWP system and sea surface temperature analysis achieved since JRA-55 (based on the operational set-up as of December 2009). New datasets of past observations are also assimilated, including rescued historical observations and reprocessed satellite data supplied by meteorological and satellite centers worldwide. Many of the deficiencies of JRA-55 are alleviated in JRA-3Q, providing a high-quality homogeneous reanalysis dataset that covers the previous 75 years.
Temporal Range:
1947-09-01 00:00 +0000 to 2024-07-31 23:00 +0000
(Entire dataset)
Period details by dataset productPeriod details by dataset product1947-09-01 00:00 +0000 (JRA-3Q 1.25 degree invariant land surface information (ll125_land) [netCDF4])1947-09-01 00:00 +0000 (JRA-3Q 1.25 degree invariant surface geopotential (ll125_surf) [netCDF4])1947-09-01 00:00 +0000 to 2024-07-31 18:00 +0000 (JRA-3Q 1.25 degree isentropic analysis fields (anl_isentrop125) [netCDF4])1947-09-01 00:00 +0000 to 2024-07-31 18:00 +0000 (JRA-3Q 1.25 degree isobaric analysis fields (anl_p125) [netCDF4])1947-09-01 00:00 +0000 to 2024-07-31 18:00 +0000 (JRA-3Q 1.25 degree isobaric average diagnostic fields (fcst_phyp125) [netCDF4])1947-09-01 00:00 +0000 to 2024-07-31 21:00 +0000 (JRA-3Q 1.25 degree isobaric forecast fields (fcst_p125) [netCDF4])1947-09-01 00:00 +0000 to 2024-07-31 18:00 +0000 (JRA-3Q 1.25 degree land surface analysis fields (anl_land125) [netCDF4])1947-09-01 00:00 +0000 to 2024-07-31 23:00 +0000 (JRA-3Q 1.25 degree land surface average diagnostic fields (fcst_phyland125) [netCDF4])1947-09-01 00:00 +0000 to 2024-07-31 23:00 +0000 (JRA-3Q 1.25 degree land surface forecast fields (fcst_land125) [netCDF4])1947-09-01 00:00 +0000 to 2024-07-31 23:00 +0000 (JRA-3Q 1.25 degree ocean surface boundary conditions (bnd_ocean125) [netCDF4])1947-09-01 18:00 +0000 to 2024-07-31 18:00 +0000 (JRA-3Q 1.25 degree snow depth analysis fields (anl_snow125) [netCDF4])1947-09-01 00:00 +0000 to 2024-07-31 18:00 +0000 (JRA-3Q 1.25 degree surface analysis fields (anl_surf125) [netCDF4])1947-09-01 00:00 +0000 to 2024-07-31 23:00 +0000 (JRA-3Q 1.25 degree two-dimensional average diagnostic fields (fcst_phy2m125) [netCDF4])1947-09-01 00:00 +0000 to 2024-07-31 23:00 +0000 (JRA-3Q 1.25 degree two-dimensional instantaneous diagnostic fields (fcst_surf125) [netCDF4])1947-09-01 00:00 +0000 (JRA-3Q invariant land surface information (tl479_land) [netCDF4])1947-09-01 00:00 +0000 (JRA-3Q invariant surface geopotential (tl479_surf) [netCDF4])1947-09-01 00:00 +0000 to 2024-07-31 18:00 +0000 (JRA-3Q isentropic analysis fields (anl_isentrop) [netCDF4])1947-09-01 00:00 +0000 to 2024-07-31 18:00 +0000 (JRA-3Q isobaric analysis fields (anl_p) [netCDF4])1947-09-01 00:00 +0000 to 2024-07-31 21:00 +0000 (JRA-3Q isobaric forecast fields (fcst_p) [netCDF4])1947-09-01 00:00 +0000 to 2024-07-31 18:00 +0000 (JRA-3Q land surface analysis fields (anl_land) [netCDF4])1947-09-01 00:00 +0000 to 2024-07-31 23:00 +0000 (JRA-3Q land surface average diagnostic fields (fcst_phyland) [netCDF4])1947-09-01 00:00 +0000 to 2024-07-31 23:00 +0000 (JRA-3Q land surface forecast fields (fcst_land) [netCDF4])1947-09-01 00:00 +0000 to 2024-07-31 18:00 +0000 (JRA-3Q model level analysis fields (anl_mdl) [netCDF4])1947-09-01 00:00 +0000 to 2024-07-31 18:00 +0000 (JRA-3Q model level average diagnostic fields (fcst_phy3m) [netCDF4])1947-09-01 00:00 +0000 to 2024-07-31 21:00 +0000 (JRA-3Q model level forecast fields (fcst_mdl) [netCDF4])1947-09-01 00:00 +0000 to 2024-07-31 23:00 +0000 (JRA-3Q ocean surface boundary conditions (bnd_ocean) [netCDF4])1947-09-01 00:00 +0000 to 2024-07-31 18:00 +0000 (JRA-3Q snow analysis fields (anl_snwlev) [netCDF4])1947-09-01 18:00 +0000 to 2024-07-31 18:00 +0000 (JRA-3Q snow depth analysis fields (anl_snow) [netCDF4])1947-09-01 00:00 +0000 to 2024-07-31 23:00 +0000 (JRA-3Q snow forecast fields (fcst_snowlev) [netCDF4])1947-09-01 00:00 +0000 to 2024-07-31 18:00 +0000 (JRA-3Q surface analysis fields (anl_surf) [netCDF4])1947-09-01 00:00 +0000 to 2024-07-31 23:00 +0000 (JRA-3Q two-dimensional average diagnostic fields (fcst_phy2m) [netCDF4])1947-09-01 00:00 +0000 to 2024-07-31 23:00 +0000 (JRA-3Q two-dimensional extreme fields (minmax_surf) [netCDF4])1947-09-01 00:00 +0000 to 2024-07-31 23:00 +0000 (JRA-3Q two-dimensional instantaneous diagnostic fields (fcst_surf) [netCDF4])
Longitude Range: Westernmost=180W Easternmost=180E
Latitude Range: Southernmost=90S Northernmost=90N
Detailed coverage informationDetailed coverage information0.375° x 0.375° from 0E to 359.625E and 89.713N to 89.713S (960 x 480 Longitude/Latitude)1.25° x 1.25° from 0E to 358.75E and 90N to 90S (288 x 145 Longitude/Latitude)
Kosaka, Y., S. Kobayashi, Y. Harada, C. Kobayashi, H. Naoe, K. Yoshimoto, M. Harada, N. Goto, J. Chiba, K. Miyaoka, R. Sekiguchi, M. Deushi, H. Kamahori, T. Nakaegawa, T. Y. Tanaka, T. Tokuhiro, Y. Sato, Y. Matsushita, and K. Onogi, 2024: The JRA-3Q Reanalysis. J. Meteor. Soc. Japan, 102, 49-109 (DOI: 10.2151/jmsj.2024-004).
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