JRA-55C: Monthly Means and Variances
d628003
| DOI: 10.5065/D6C827B7
Abstract:
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.
Temporal Range:
1972-11-01 00:00 +0000 to 2013-01-01 00:00 +0000
(Entire dataset)
Period details by dataset product
Period details by dataset product
1981-01-01 00:00 +0000 (JRA-55C 1.25 Degree Constant Fields)
1981-01-01 00:00 +0000 (JRA-55C 2.5 Degree Constant Fields)
1981-01-01 00:00 +0000 (JRA-55C Model Resolution Constant Fields)
1972-11-01 00:00 +0000 to 2013-01-01 00:00 +0000 (JRA-55C Monthly Mean 1.25 Degree 2-Dimensional Average Diagnostic Fields)
1972-11-01 00:00 +0000 to 2012-12-01 00:00 +0000 (JRA-55C Monthly Mean 1.25 Degree 2-Dimensional Instantaneous Diagnostic Fields)
1972-11-01 00:00 +0000 to 2012-12-01 00:00 +0000 (JRA-55C Monthly Mean 1.25 Degree Isentropic Analysis Fields)
1972-11-01 00:00 +0000 to 2012-12-01 00:00 +0000 (JRA-55C Monthly Mean 1.25 Degree Isobaric Analysis Fields)
1972-11-01 00:00 +0000 to 2012-12-01 00:00 +0000 (JRA-55C Monthly Mean 1.25 Degree Isobaric Forecast Fields)
1972-11-01 00:00 +0000 to 2012-12-01 00:00 +0000 (JRA-55C Monthly Mean 1.25 Degree Land Surface Analysis Fields)
1972-11-01 00:00 +0000 to 2013-01-01 00:00 +0000 (JRA-55C Monthly Mean 1.25 Degree Land Surface Average Diagnostic Fields)
1972-11-01 00:00 +0000 to 2012-12-01 00:00 +0000 (JRA-55C Monthly Mean 1.25 Degree Land Surface Forecast Fields)
1972-11-01 00:00 +0000 to 2012-12-01 00:00 +0000 (JRA-55C Monthly Mean 1.25 Degree Sea Ice Fields)
1972-11-01 18:00 +0000 to 2012-12-01 18:00 +0000 (JRA-55C Monthly Mean 1.25 Degree Snow Depth Analysis Fields)
1972-11-01 00:00 +0000 to 2012-12-01 00:00 +0000 (JRA-55C Monthly Mean 1.25 Degree Surface Analysis Fields)
1972-11-01 00:00 +0000 to 2012-12-01 00:00 +0000 (JRA-55C Monthly Mean 1.25 Degree Total Column Analysis Fields)
1972-11-01 00:00 +0000 to 2012-12-01 00:00 +0000 (JRA-55C Monthly Mean 1.25 Degree Total Column Forecast Fields)
1972-11-01 00:00 +0000 to 2012-12-01 00:00 +0000 (JRA-55C Monthly Mean 2.5 Degree Isobaric Analysis Fields)
1972-11-01 00:00 +0000 to 2012-12-01 00:00 +0000 (JRA-55C Monthly Mean 2.5 Degree Isobaric Forecast Fields)
1972-11-01 00:00 +0000 to 2013-01-01 00:00 +0000 (JRA-55C Monthly Mean Model Resolution 2-Dimensional Average Diagnostic Fields)
1972-11-01 00:00 +0000 to 2012-12-01 00:00 +0000 (JRA-55C Monthly Mean Model Resolution 2-Dimensional Instantaneous Diagnostic Fields)
1972-11-01 00:00 +0000 to 2012-12-01 00:00 +0000 (JRA-55C Monthly Mean Model Resolution Isentropic Analysis Fields)
1972-11-01 00:00 +0000 to 2012-12-01 00:00 +0000 (JRA-55C Monthly Mean Model Resolution Land Surface Analysis Fields)
1972-11-01 00:00 +0000 to 2013-01-01 00:00 +0000 (JRA-55C Monthly Mean Model Resolution Land Surface Average Diagnostic Fields)
1972-11-01 00:00 +0000 to 2012-12-01 00:00 +0000 (JRA-55C Monthly Mean Model Resolution Land Surface Forecast Fields)
1972-11-01 00:00 +0000 to 2012-12-01 00:00 +0000 (JRA-55C Monthly Mean Model Resolution Model Level Analysis Fields)
1972-11-01 00:00 +0000 to 2013-01-01 00:00 +0000 (JRA-55C Monthly Mean Model Resolution Model Level Average Diagnostic Fields)
1972-11-01 00:00 +0000 to 2012-12-01 00:00 +0000 (JRA-55C Monthly Mean Model Resolution Model Level Forecast Fields)
1972-11-01 00:00 +0000 to 2012-12-01 00:00 +0000 (JRA-55C Monthly Mean Model Resolution Sea Ice Fields)
1972-11-01 18:00 +0000 to 2012-12-01 18:00 +0000 (JRA-55C Monthly Mean Model Resolution Snow Depth Analysis Fields)
1972-11-01 00:00 +0000 to 2012-12-01 00:00 +0000 (JRA-55C Monthly Mean Model Resolution Surface Analysis Fields)
1972-11-01 00:00 +0000 to 2012-12-01 00:00 +0000 (JRA-55C Monthly Mean Model Resolution Total Column Analysis Fields)
1972-11-01 00:00 +0000 to 2012-12-01 00:00 +0000 (JRA-55C Monthly Mean Model Resolution Total Column Forecast Fields)
1972-11-01 00:00 +0000 to 2013-01-01 00:00 +0000 (JRA-55C Monthly Variance of 1.25 Degree 2-Dimensional Average Diagnostic Fields)
1972-11-01 00:00 +0000 to 2012-12-31 18:00 +0000 (JRA-55C Monthly Variance of 1.25 Degree 2-Dimensional Instantaneous Diagnostic Fields)
1972-11-01 00:00 +0000 to 2012-12-31 18:00 +0000 (JRA-55C Monthly Variance of 1.25 Degree Isentropic Analysis Fields)
1972-11-01 00:00 +0000 to 2012-12-31 18:00 +0000 (JRA-55C Monthly Variance of 1.25 Degree Isobaric Analysis Fields)
1972-11-01 00:00 +0000 to 2012-12-31 18:00 +0000 (JRA-55C Monthly Variance of 1.25 Degree Isobaric Forecast Fields)
1972-11-01 00:00 +0000 to 2012-12-31 18:00 +0000 (JRA-55C Monthly Variance of 1.25 Degree Land Surface Analysis Fields)
1972-11-01 00:00 +0000 to 2013-01-01 00:00 +0000 (JRA-55C Monthly Variance of 1.25 Degree Land Surface Average Diagnostic Fields)
1972-11-01 00:00 +0000 to 2012-12-31 18:00 +0000 (JRA-55C Monthly Variance of 1.25 Degree Land Surface Forecast Fields)
1972-11-01 00:00 +0000 to 2012-12-31 18:00 +0000 (JRA-55C Monthly Variance of 1.25 Degree Sea Ice Fields)
1972-11-01 18:00 +0000 to 2012-12-31 18:00 +0000 (JRA-55C Monthly Variance of 1.25 Degree Snow Depth Analysis Fields)
1972-11-01 00:00 +0000 to 2012-12-31 18:00 +0000 (JRA-55C Monthly Variance of 1.25 Degree Surface Analysis Fields)
1972-11-01 00:00 +0000 to 2012-12-31 18:00 +0000 (JRA-55C Monthly Variance of 1.25 Degree Total Column Analysis Fields)
1972-11-01 00:00 +0000 to 2012-12-31 18:00 +0000 (JRA-55C Monthly Variance of 1.25 Degree Total Column Forecast Fields)
1972-11-01 00:00 +0000 to 2012-12-31 18:00 +0000 (JRA-55C Monthly Variance of 2.5 Degree Isobaric Analysis Fields)
1972-11-01 00:00 +0000 to 2012-12-31 18:00 +0000 (JRA-55C Monthly Variance of 2.5 Degree Isobaric Forecast Fields)
1972-11-01 00:00 +0000 to 2013-01-01 00:00 +0000 (JRA-55C Monthly Variance of Model Resolution 2-Dimensional Average Diagnostic Fields)
1972-11-01 00:00 +0000 to 2012-12-31 18:00 +0000 (JRA-55C Monthly Variance of Model Resolution 2-Dimensional Instantaneous Diagnostic Fields)
1972-11-01 00:00 +0000 to 2012-12-31 18:00 +0000 (JRA-55C Monthly Variance of Model Resolution Isentropic Analysis Fields)
1972-11-01 00:00 +0000 to 2012-12-31 18:00 +0000 (JRA-55C Monthly Variance of Model Resolution Land Surface Analysis Fields)
1972-11-01 00:00 +0000 to 2013-01-01 00:00 +0000 (JRA-55C Monthly Variance of Model Resolution Land Surface Average Diagnostic Fields)
1972-11-01 00:00 +0000 to 2012-12-31 18:00 +0000 (JRA-55C Monthly Variance of Model Resolution Land Surface Forecast Fields)
1972-11-01 00:00 +0000 to 2012-12-31 18:00 +0000 (JRA-55C Monthly Variance of Model Resolution Model Level Analysis Fields)
1972-11-01 00:00 +0000 to 2013-01-01 00:00 +0000 (JRA-55C Monthly Variance of Model Resolution Model Level Average Diagnostic Fields)
1972-11-01 00:00 +0000 to 2012-12-31 18:00 +0000 (JRA-55C Monthly Variance of Model Resolution Model Level Forecast Fields)
1972-11-01 00:00 +0000 to 2012-12-31 18:00 +0000 (JRA-55C Monthly Variance of Model Resolution Sea Ice Fields)
1972-11-01 18:00 +0000 to 2012-12-31 18:00 +0000 (JRA-55C Monthly Variance of Model Resolution Snow Depth Analysis Fields)
1972-11-01 00:00 +0000 to 2012-12-31 18:00 +0000 (JRA-55C Monthly Variance of Model Resolution Surface Analysis Fields)
1972-11-01 00:00 +0000 to 2012-12-31 18:00 +0000 (JRA-55C Monthly Variance of Model Resolution Total Column Analysis Fields)
1972-11-01 00:00 +0000 to 2012-12-31 18:00 +0000 (JRA-55C Monthly Variance of Model Resolution Total Column Forecast Fields)
Usage Restrictions:
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 (jra@met.kishou.go.jp) with a copy of their scientific or technical papers, publications, press releases or other communications regarding these datasets.
b. Disclaimer
- 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.
Variables:
| Air Temperature | Atmospheric Heating | 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 | 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 |
Vertical Levels:
See the detailed metadata for level information.
Data Types:
Grid
Spatial Coverage:
Longitude Range: Westernmost=180W Easternmost=180E
Latitude Range: Southernmost=90S Northernmost=90N Detailed coverage information Detailed coverage information 0.562° x ~0.562° from 0E to 359.438E and 89.57N to 89.57S (640 x 320 Longitude/Gaussian Latitude) 0.563° x ~0.562° from 0E to 359.438E and 89.57N to 89.57S (640 x 320 Longitude/Gaussian Latitude) 1.25° x 1.25° from 0E to 1.25W and 90N to 90S (288 x 145 Longitude/Latitude) 1.25° x 1.25° from 0E to 358.75E and 90N to 90S (288 x 145 Longitude/Latitude) 2.5° x 2.5° from 0E to 357.5E and 90N to 90S (144 x 73 Longitude/Latitude)
Latitude Range: Southernmost=90S Northernmost=90N Detailed coverage information Detailed coverage information 0.562° x ~0.562° from 0E to 359.438E and 89.57N to 89.57S (640 x 320 Longitude/Gaussian Latitude) 0.563° x ~0.562° from 0E to 359.438E and 89.57N to 89.57S (640 x 320 Longitude/Gaussian Latitude) 1.25° x 1.25° from 0E to 1.25W and 90N to 90S (288 x 145 Longitude/Latitude) 1.25° x 1.25° from 0E to 358.75E and 90N to 90S (288 x 145 Longitude/Latitude) 2.5° x 2.5° from 0E to 357.5E and 90N to 90S (144 x 73 Longitude/Latitude)
Data Contributors:
JP/JMA
Japan Meteorological Agency, Japan
Related Resources:
Publications:
Kobayashi, S., Y. Ota, Y. Harada, A. Ebita, M. Moriya, H. Onoda, K. Onogi, H. Kamahori, C. Kobayashi, H. Endo, K. Miyaoka, and K. Takahashi, 2015: The JRA-55 Reanalysis: General Specifications and Basic Characteristics. J. Met. Soc. Jap., 93(1), 5-48 (DOI: 10.2151/jmsj.2015-001).
Kobayashi, C., H. Endo, Y. Ota, S. Kobayashi, H. Onoda, Y. Harada, K. Onogi and H. Kamahori, 2014: Preliminary results of the JRA-55C, an atmospheric reanalysis assimilating conventional observations only. Sci. Online Lett. on the Atmos, 10, 78-82 (DOI: 10.2151/sola.2014-016).
Onogi, K., J. Tsutsui, H. Koide, M. Sakamoto, S. Kobayashi, H. Hatsushika, T. Matsumoto, N. Yamazaki, H. Kamahori, K. Takahashi, S. Kadokura, K. Wada, K. Kato, R. Oyama, T. Ose, N. Mannoji, and R. Taira, 2007: The JRA-25 Reanalysis. J. Met. Soc. Jap., 85(3), 369-432 (DOI: 10.2151/jmsj.85.369).
Total Volume:
831.91 GB
(Entire dataset)
Volume details by dataset product
Volume details by dataset product
JRA-55C Monthly Mean Model Resolution Model Level Analysis Fields: 53.32 GB
JRA-55C Monthly Variance of Model Resolution Total Column Analysis Fields: 987.34 MB
JRA-55C Monthly Variance of 1.25 Degree Land Surface Forecast Fields: 166.59 MB
JRA-55C Monthly Variance of 1.25 Degree Land Surface Analysis Fields: 89.7 MB
JRA-55C Monthly Mean Model Resolution Land Surface Forecast Fields: 1.03 GB
JRA-55C Monthly Variance of Model Resolution Surface Analysis Fields: 1.38 GB
JRA-55C Monthly Mean 1.25 Degree Land Surface Analysis Fields: 89.7 MB
JRA-55C Monthly Variance of Model Resolution Land Surface Forecast Fields: 1.03 GB
JRA-55C Monthly Mean 1.25 Degree Surface Analysis Fields: 272.2 MB
JRA-55C Monthly Variance of 1.25 Degree Snow Depth Analysis Fields: 12.81 MB
JRA-55C Monthly Mean Model Resolution Model Level Forecast Fields: 106.64 GB
JRA-55C Monthly Mean 1.25 Degree Total Column Analysis Fields: 151.22 MB
JRA-55C Monthly Mean 1.25 Degree Snow Depth Analysis Fields: 12.81 MB
JRA-55C Monthly Mean 1.25 Degree Land Surface Forecast Fields: 166.59 MB
JRA-55C Monthly Mean Model Resolution Surface Analysis Fields: 1.38 GB
JRA-55C Monthly Variance of Model Resolution Model Level Analysis Fields: 53.32 GB
JRA-55C Monthly Mean Model Resolution Total Column Analysis Fields: 987.34 MB
JRA-55C Monthly Variance of 1.25 Degree Total Column Analysis Fields: 151.22 MB
JRA-55C Monthly Mean Model Resolution Isentropic Analysis Fields: 26.12 GB
JRA-55C Monthly Variance of Model Resolution Isentropic Analysis Fields: 26.12 GB
JRA-55C Monthly Mean 1.25 Degree Isentropic Analysis Fields: 5.34 GB
JRA-55C Monthly Variance of 1.25 Degree Isentropic Analysis Fields: 5.34 GB
JRA-55C Monthly Mean Model Resolution Land Surface Analysis Fields: 554.58 MB
JRA-55C Monthly Variance of Model Resolution Land Surface Analysis Fields: 554.58 MB
JRA-55C Monthly Mean 1.25 Degree Isobaric Analysis Fields: 12.52 GB
JRA-55C Monthly Variance of 1.25 Degree Isobaric Analysis Fields: 12.52 GB
JRA-55C Monthly Mean 2.5 Degree Isobaric Analysis Fields: 3.17 GB
JRA-55C Monthly Variance of 2.5 Degree Isobaric Analysis Fields: 3.17 GB
JRA-55C Monthly Mean Model Resolution Snow Depth Analysis Fields: 79.23 MB
JRA-55C Monthly Variance of Model Resolution Snow Depth Analysis Fields: 79.23 MB
JRA-55C Monthly Variance of 1.25 Degree Surface Analysis Fields: 272.2 MB
JRA-55C Monthly Mean Model Resolution Total Column Forecast Fields: 1.58 GB
JRA-55C Monthly Variance of Model Resolution Total Column Forecast Fields: 1.58 GB
JRA-55C Monthly Mean 1.25 Degree Total Column Forecast Fields: 241.96 MB
JRA-55C Monthly Variance of 1.25 Degree Total Column Forecast Fields: 241.96 MB
JRA-55C Monthly Variance of Model Resolution Model Level Forecast Fields: 106.64 GB
JRA-55C Monthly Mean 1.25 Degree Isobaric Forecast Fields: 4.39 GB
JRA-55C Monthly Variance of 1.25 Degree Isobaric Forecast Fields: 4.39 GB
JRA-55C Monthly Mean 2.5 Degree Isobaric Forecast Fields: 1.11 GB
JRA-55C Monthly Variance of 2.5 Degree Isobaric Forecast Fields: 1.11 GB
JRA-55C Monthly Mean Model Resolution 2-Dimensional Average Diagnostic Fields: 5.73 GB
JRA-55C Monthly Variance of Model Resolution 2-Dimensional Average Diagnostic Fields: 5.73 GB
JRA-55C Monthly Mean 1.25 Degree 2-Dimensional Average Diagnostic Fields: 786.36 MB
JRA-55C Monthly Variance of 1.25 Degree 2-Dimensional Average Diagnostic Fields: 786.36 MB
JRA-55C Monthly Mean Model Resolution Model Level Average Diagnostic Fields: 186.62 GB
JRA-55C Monthly Variance of Model Resolution Model Level Average Diagnostic Fields: 186.62 GB
JRA-55C Monthly Mean Model Resolution Land Surface Average Diagnostic Fields: 396.13 MB
JRA-55C Monthly Variance of Model Resolution Land Surface Average Diagnostic Fields: 396.13 MB
JRA-55C Monthly Mean 1.25 Degree Land Surface Average Diagnostic Fields: 64.07 MB
JRA-55C Monthly Variance of 1.25 Degree Land Surface Average Diagnostic Fields: 64.07 MB
JRA-55C Monthly Mean Model Resolution 2-Dimensional Instantaneous Diagnostic Fields: 2.57 GB
JRA-55C Monthly Variance of Model Resolution 2-Dimensional Instantaneous Diagnostic Fields: 2.57 GB
JRA-55C Monthly Mean 1.25 Degree 2-Dimensional Instantaneous Diagnostic Fields: 423.42 MB
JRA-55C Monthly Variance of 1.25 Degree 2-Dimensional Instantaneous Diagnostic Fields: 423.42 MB
JRA-55C Monthly Mean Model Resolution Sea Ice Fields: 197.47 MB
JRA-55C Monthly Variance of Model Resolution Sea Ice Fields: 197.47 MB
JRA-55C Monthly Mean 1.25 Degree Sea Ice Fields: 22.52 MB
JRA-55C Monthly Variance of 1.25 Degree Sea Ice Fields: 22.52 MB
JRA-55C 1.25 Degree Constant Fields: 0.25 MB
JRA-55C 2.5 Degree Constant Fields: 0.06 MB
JRA-55C Model Resolution Constant Fields: 1.23 MB
Data Formats:
Related RDA Datasets:
-
-
NOAA/CIRES Twentieth Century Global Reanalysis Version 2c
-
Japanese 25-year Reanalysis Project
-
Japanese 25-year Reanalysis Project, Monthly Means
-
ERA-20C Project (ECMWF Atmospheric Reanalysis of the 20th Century)
-
ERA-Interim Project
-
ERA-Interim Project, Monthly Means
-
ERA-Interim Project, Single Parameter 6-Hourly Surface Analysis and Surface Forecast Time Series
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JRA-55: Japanese 55-year Reanalysis, Daily 3-Hourly and 6-Hourly Data
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JRA-55: Japanese 55-year Reanalysis, Monthly Means and Variances
-
JRA-55C: The Japanese 55-year Reanalysis Using Conventional Data Only
-
JRA-55AMIP: The Japanese 55-year Reanalysis AMIP-type Simulation
-
JRA-55AMIP: Monthly Means and Variances Including Diurnal Statistics
More Details:
View a more detailed summary of the data, including specific date ranges and locations by parameter
Metadata Record:
Data License:
This work is licensed under a Creative Commons Attribution 4.0 International License.
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