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- 2 July 2021
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New JRA-55 climatological normals have been calculated for the period from 1991 to 2020 (Clim9120), and have become available on DIAS.
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Accordingly, JRA-55 Product Users' Handbooks are updated.
- 20 November 2020
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Dataset of JRA-55CHS, an atmospheric reanalysis assimilating conventional observations only with high resolution SST, has become available on DIAS.
- 18 September 2020
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Capacity for registration of new JRA users with JDDS has been terminated.
JDDS-registered JRA users are advised to download data from collaborative organizations hereafter.
- 14 September 2020
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Termination of JRA data provision and registration of new JRA users with JDDS
- 22 January 2020
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Issue with tropical cyclone analysis in JRA-55
- 3 December 2019
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Addition of commentary on remaking/updating metafiles for JRA-55 data visualization
- 15 November 2019
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Issue with updating of metafiles for JRA-55 data visualization
- 11 October 2018
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Replacement of the missing data in the JRA-55 product
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JRA-55 Product Users' Handbooks are updated.
- 2 October 2018
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Partially missing data in the JRA-55 product
- 8 December 2017
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Due to restrictions of the storage resources, the directories for the period from January 1971 to September 1980 (for all categories) will be moved.
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Following this move, a switch of the symbolic links under the JRA-55/Hist/Daily directory will take place on 11 December 2017, 04-06 UTC.
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Please be informed that the symbolic links to the directories for the aforementioned period will be temporarily disconnected during this switch.
- 25 October 2017
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Provision of the model grid isentropic analysis fields (anl_isentrop) for the past period (1958-2016) from the JMA Data Dissemination System (JDDS) will be terminated as of the end of October 2017.
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Due to restrictions of the storage resources, provision of the above data from JDDS will be terminated.
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The above data at DIAS and NCAR will remain available, and can be downloaded from these collaborative organizations as ever.
- 18 July 2017
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Official English website for Dynamical Regional Downscaling Using the JRA-55 Reanalysis (DSJRA-55) launched.
- 28 July 2016
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Impact of snow depth analysis bugs on the JRA-55 product for the period from 2015 to 2016
- 02 July 2016
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The JRA-55 comprehensive report II (Harada et al. 2016) has been published in
JMSJ volume 94, No.3, 269-302.
- 18 May 2016
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Impact of snow depth analysis bugs on the JRA-55 product
- 25 February 2016
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The JRA-55 comprehensive report II (Harada et al. 2016) has been released as
EOR of JMSJ.
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The JRA-55 evaluation paper (Kobayashi and Iwasaki 2016) has been released as
EOR of JGR.
- 24 February 2016
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A compilation of climate maps produced with JRA-55 (The JRA-55 Atlas) is released.
- 18 December 2015
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Bugs in JRA-55 snow depth analysis (updated)
- 15 October 2015
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The JRA-55 manuals (1.25-degree latitude/longitude grid data and model grid data (TL319L60)) are updated to add notes on cloud work function and upward mass flux on cloud base.
- 21 July 2015
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Dataset of JRA-55C, an atmospheric reanalysis assimilating conventional observations only, become available on NCAR.
- 12 June 2015
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Dataset of JRA-55AMIP, JRA-55 AMIP-type simulation, become available on DIAS.
- 22 May 2015
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The JRA-55 manual 1.25-degree latitude/longitude grid data is updated.
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The JRA-55 manual model grid data (TL319L60) is updated.
- 18 March 2015
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The JRA-55 comprehensive report (Kobayashi et al. 2015) has been published in
JMSJ volume 93, No.1, 5-48.
- 05 February 2015
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Dataset of JRA-55C, an atmospheric reanalysis assimilating conventional observations only, become available on DIAS.
- 17 November 2014
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JRA-55 leaflet is released.
- 29 September 2014
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The JRA-55 comprehensive report (Kobayashi et al. 2015) has been accepted on 18th September 2014 for an article for publications in JMSJ volume 93, No.1.
Early Online Release of the article has been uploaded
- 06 June 2014
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The JRA-55 manual 1.25-degree latitude/longitude grid data is updated.
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The JRA-55 manual model grid data (TL319L60) is updated.
- 10 March 2014
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The JRA-55 manual 1.25-degree latitude/longitude grid data is updated.
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The JRA-55 manual model grid data (TL319L60) is released.
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The JRA-55 model grid data (TL319L60) distribution has been started.
- 29 January 2014
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Near-real-time JRA-55 latitude/longitude gridded data distribution begins.
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JRA-55 latitude/longitude gridded data (2013) distribution begins.
- 25 December 2013
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Release schedule for JRA-55 data and plan for JRA-25/JCDAS data provision phase-out (changed)
- 24 December 2013
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JRA-55 daily latitude/longitude gridded data (1958 to 1978) distribution begins.
- 27 November 2013
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JRA-55 daily latitude/longitude gridded data (1979 to 1995) distribution begins.
- 30 October 2013
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JRA-55 daily latitude/longitude gridded data (1996 to 2012) distribution begins.
- 1 October 2013
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JRA-55 monthly latitude/longitude gridded data distribution begins.
- 30 September 2013
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Release schedule for JRA-55 data and plan for JRA-25/JCDAS data provision phase-out
- Launch of JRA-55 website.