Difference between revisions of "JRA55"

Line 4: Line 4:
 
<span style="font-family: Arial,Helvetica,sans-serif; font-size: 120%;">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.</span> <span style="font-family: Arial,Helvetica,sans-serif;">(This information was obtained from the NCAR website [http://rda.ucar.edu/datasets/ds628.0/ http://rda.ucar.edu/datasets/ds628.0/])</span>
 
<span style="font-family: Arial,Helvetica,sans-serif; font-size: 120%;">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.</span> <span style="font-family: Arial,Helvetica,sans-serif;">(This information was obtained from the NCAR website [http://rda.ucar.edu/datasets/ds628.0/ http://rda.ucar.edu/datasets/ds628.0/])</span>
  
 +
&nbsp;
  
 
=== '''<span style="font-family: Arial,Helvetica,sans-serif; font-size: 120%;">License</span>''' ===
 
=== '''<span style="font-family: Arial,Helvetica,sans-serif; font-size: 120%;">License</span>''' ===
Line 13: Line 14:
 
<span style="font-family: Arial,Helvetica,sans-serif; font-size: 120%;">To cite:</span>
 
<span style="font-family: Arial,Helvetica,sans-serif; font-size: 120%;">To cite:</span>
  
<span style="font-size:16px; text-align:start; -webkit-text-stroke-width:0px"><span style="color:#000000"><span style="font-family:Poppins, sans-serif"><span style="font-style:normal"><span style="font-variant-ligatures:normal"><span style="font-variant-caps:normal"><span style="font-weight:400"><span style="letter-spacing:normal"><span style="orphans:2"><span style="text-transform:none"><span style="white-space:normal"><span style="widows:2"><span style="word-spacing:0px"><span style="background-color:#fffff5"><span style="text-decoration-style:initial"><span style="text-decoration-color:initial"><span style="display:inline !important"><span style="float:none">Japan Meteorological Agency/Japan (2013), JRA-55: Japanese 55-year Reanalysis, Daily 3-Hourly and 6-Hourly Data, https://doi.org/10.5065/D6HH6H41, Research Data Archive at the National Center for Atmospheric Research, Computational and Information Systems Laboratory, Boulder, Colo. (Updated monthly.) Accessed</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span><font color="red"><font style="font-family: Poppins, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 245); text-decoration-style: initial; text-decoration-color: initial;">†</font></font><span style="font-size:16px; text-align:start; -webkit-text-stroke-width:0px"><span style="color:#000000"><span style="font-family:Poppins, sans-serif"><span style="font-style:normal"><span style="font-variant-ligatures:normal"><span style="font-variant-caps:normal"><span style="font-weight:400"><span style="letter-spacing:normal"><span style="orphans:2"><span style="text-transform:none"><span style="white-space:normal"><span style="widows:2"><span style="word-spacing:0px"><span style="background-color:#fffff5"><span style="text-decoration-style:initial"><span style="text-decoration-color:initial"><span style="display:inline !important"><span style="float:none">&nbsp;dd mmm yyyy.</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span><br/> &nbsp;&nbsp;<small style="font-size:13px; color:#000000; font-family:Poppins, sans-serif; font-style:normal; font-variant-ligatures:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; orphans:2; text-align:start; text-transform:none; white-space:normal; widows:2; word-spacing:0px; -webkit-text-stroke-width:0px; background-color:#fffff5; text-decoration-style:initial; text-decoration-color:initial"><font color="red">†</font>Please fill in the "Accessed" date with the day, month, and year (e.g. - 5 Aug 2011) you last accessed the data.</small>
+
<span style="font-size:16px; text-align:start; -webkit-text-stroke-width:0px"><span style="color:#000000"><span style="font-family:Poppins, sans-serif"><span style="font-style:normal"><span style="font-variant-ligatures:normal"><span style="font-variant-caps:normal"><span style="font-weight:400"><span style="letter-spacing:normal"><span style="orphans:2"><span style="text-transform:none"><span style="white-space:normal"><span style="widows:2"><span style="word-spacing:0px"><span style="background-color:#fffff5"><span style="text-decoration-style:initial"><span style="text-decoration-color:initial"><span style="display:inline !important"><span style="float:none">Japan Meteorological Agency/Japan (2013), JRA-55: Japanese 55-year Reanalysis, Daily 3-Hourly and 6-Hourly Data, [https://doi.org/10.5065/D6HH6H41 https://doi.org/10.5065/D6HH6H41], Research Data Archive at the National Center for Atmospheric Research, Computational and Information Systems Laboratory, Boulder, Colo. (Updated monthly.) Accessed</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span><font color="red"><font style="font-family: Poppins, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 245); text-decoration-style: initial; text-decoration-color: initial;">†</font></font><span style="font-size:16px; text-align:start; -webkit-text-stroke-width:0px"><span style="color:#000000"><span style="font-family:Poppins, sans-serif"><span style="font-style:normal"><span style="font-variant-ligatures:normal"><span style="font-variant-caps:normal"><span style="font-weight:400"><span style="letter-spacing:normal"><span style="orphans:2"><span style="text-transform:none"><span style="white-space:normal"><span style="widows:2"><span style="word-spacing:0px"><span style="background-color:#fffff5"><span style="text-decoration-style:initial"><span style="text-decoration-color:initial"><span style="display:inline !important"><span style="float:none">&nbsp;dd mmm yyyy.</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span><br/> &nbsp;&nbsp;<small style="font-size:13px; color:#000000; font-family:Poppins, sans-serif; font-style:normal; font-variant-ligatures:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; orphans:2; text-align:start; text-transform:none; white-space:normal; widows:2; word-spacing:0px; -webkit-text-stroke-width:0px; background-color:#fffff5; text-decoration-style:initial; text-decoration-color:initial"><font color="red">†</font>Please fill in the "Accessed" date with the day, month, and year (e.g. - 5 Aug 2011) you last accessed the data.</small>
 +
 
 +
&nbsp;
 +
 
 +
=== <span style="font-family:Arial,Helvetica,sans-serif;">'''Known issues'''</span> ===
  
=== '''<span style="font-family: Arial,Helvetica,sans-serif; font-size: 120%;">JRA55 on raijin</span>''' ===
+
29-01-2020 - Some tropical cyclones occurring over the Northeast Pacific and the North Atlantic from 1959 to 1987 were erroneously represented as anti-cyclonic vortices in the Japanese 55-year Reanalysis (JRA-55) dataset. A detailed report is available at the JRA-55 website:
  
==== ''<span style="font-family: Arial,Helvetica,sans-serif; font-size: 120%;">Getting access:</span>'' ====
+
# Issue with tropical cyclone analysis in JRA-55
  
<span style="font-family: Arial,Helvetica,sans-serif; font-size: 120%;">This dataset is part of the climate re-analysis collection, which is stored on raijin in the climate re-analysis collection, which is a collaboration between BoM, CSIRO and ARCCSS.</span> <span style="font-family: Arial,Helvetica,sans-serif; font-size: 120%;">To access the data you need to be part of '''rr7 group, request access via [https://my.nci.org.au | my.nci.org.au]'''</span>
+
[https://protect-au.mimecast.com/s/ocz8CANZy7iKkkn2UY1gbM?domain=jra.kishou.go.jp https://jra.kishou.go.jp/JRA-55/index_en.html#quality]
  
<span style="font-family: Arial,Helvetica,sans-serif; font-size: 120%;">Data is located in</span>
+
=== '''<span style="font-family: Arial,Helvetica,sans-serif; font-size: 120%;">JRA55 at NCI</span>''' ===
  
*&nbsp;  
+
==== ''<span style="font-family: Arial,Helvetica,sans-serif; font-size: 120%;">Getting access:</span>'' ====
  
<span style="font-size: 130%;">pressure levels: /g/data1/rr7/JRA55/6hr/atmos/<varname>/v1/<filenames></span>
+
<span style="font-family: Arial,Helvetica,sans-serif; font-size: 120%;">This dataset is part of the climate re-analysis collection, which is stored on raijin in the climate re-analysis collection, which is a collaboration between BoM, CSIRO and ARCCSS.</span> <span style="font-family: Arial,Helvetica,sans-serif; font-size: 120%;">To access the data you need to be part of '''rr7 group, request access via [https://my.nci.org.au my.nci.org.au]'''</span>
  
*&nbsp;  
+
<span style="font-family: Arial,Helvetica,sans-serif; font-size: 120%;">Data is located in</span>
  
<span style="font-size: 130%;">model levels: /g/data1/rr7/JRA55/6hr/atmos/reg-tl319/<varname>/v1/<filenames></span>
+
*<span style="font-size: 130%;">pressure levels: /g/data1/rr7/JRA55/6hr/atmos/<varname>/v1/<filenames></span>
 +
*<span style="font-size: 130%;">model levels: /g/data1/rr7/JRA55/6hr/atmos/reg-tl319/<varname>/v1/<filenames></span>  
  
 
<span style="font-family: Arial,Helvetica,sans-serif; font-size: 120%;">Filenames are:</span> <span style="font-family: Arial,Helvetica,sans-serif; font-size: 120%;"><var>_<mip>_JRA55_<grid>_<YYYYMMDDHH-YYYMMDDHH>.nc</var></span> <span style="font-family: Arial,Helvetica,sans-serif; font-size: 120%;"><grid> information is currently present only for model level data and it is "reg-tl319"</span> <span style="font-family: Arial,Helvetica,sans-serif; font-size: 120%;"><mip> is 6hrPlev and 6hrLev for pressure and model levels respectively</span>
 
<span style="font-family: Arial,Helvetica,sans-serif; font-size: 120%;">Filenames are:</span> <span style="font-family: Arial,Helvetica,sans-serif; font-size: 120%;"><var>_<mip>_JRA55_<grid>_<YYYYMMDDHH-YYYMMDDHH>.nc</var></span> <span style="font-family: Arial,Helvetica,sans-serif; font-size: 120%;"><grid> information is currently present only for model level data and it is "reg-tl319"</span> <span style="font-family: Arial,Helvetica,sans-serif; font-size: 120%;"><mip> is 6hrPlev and 6hrLev for pressure and model levels respectively</span>
Line 66: Line 72:
 
&nbsp;
 
&nbsp;
  
[[Category:Dataset]][[Category:Clex-managed-data]]
+
[[Category:Dataset]] [[Category:Clex-managed-data]]

Revision as of 20:11, 2 February 2020

Template:Needs Update This page needs updating

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. (This information was obtained from the NCAR website http://rda.ucar.edu/datasets/ds628.0/)

 

License

You need to register by filling the | JRA-55 project application form to use this dataset. A copy of their agreement is available here as File:Application_JRA_Data_Access.pdf.

More information, the JRA55 user manuals for pressure and model levels and quality issues with the data are listed both in the | JRA-55 project website and the NCAR | Climate Data Guide and | JRA-55 dataset webpages

To cite:

Japan Meteorological Agency/Japan (2013), JRA-55: Japanese 55-year Reanalysis, Daily 3-Hourly and 6-Hourly Data, https://doi.org/10.5065/D6HH6H41, Research Data Archive at the National Center for Atmospheric Research, Computational and Information Systems Laboratory, Boulder, Colo. (Updated monthly.) Accessed dd mmm yyyy.
  Please fill in the "Accessed" date with the day, month, and year (e.g. - 5 Aug 2011) you last accessed the data.

 

Known issues

29-01-2020 - Some tropical cyclones occurring over the Northeast Pacific and the North Atlantic from 1959 to 1987 were erroneously represented as anti-cyclonic vortices in the Japanese 55-year Reanalysis (JRA-55) dataset. A detailed report is available at the JRA-55 website:

  1. Issue with tropical cyclone analysis in JRA-55

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

JRA55 at NCI

Getting access:

This dataset is part of the climate re-analysis collection, which is stored on raijin in the climate re-analysis collection, which is a collaboration between BoM, CSIRO and ARCCSS. To access the data you need to be part of rr7 group, request access via my.nci.org.au

Data is located in

  • pressure levels: /g/data1/rr7/JRA55/6hr/atmos/<varname>/v1/<filenames>
  • model levels: /g/data1/rr7/JRA55/6hr/atmos/reg-tl319/<varname>/v1/<filenames>

Filenames are: _<mip>_JRA55_<grid>_<YYYYMMDDHH-YYYMMDDHH>.nc <grid> information is currently present only for model level data and it is "reg-tl319" <mip> is 6hrPlev and 6hrLev for pressure and model levels respectively

List of variables

Currently available variables on model levels are

  • ta - atmospheric temperature
  • ua - eastward wind component
  • va - northward wind component
  • hus - specific humidity
  • zg - geopotential
  • ps - surface air pressure

Currently available variables on pressure levels are

  • tas- surface atmospheric temperature
  • uas - surface eastward wind component
  • vas - surface northward wind component
  • hurs - surface relative humidity
  • huss - surface specific humidity
  • zg - geopotential
  • ps - surface air pressure
  • psl - air pressure at sea level
  • dptas - Near-Surface Dew Point Depression

Download & conversion process

We downloaded the model analysis level from the NCAR website and the pressure level data from the JMA Data Dissemination System

Feedback

You can add comment on this collection directly here or on the dedicated | Observational and Reanalysis Data page on NCI confluence For questions use the | Climate Community confluence questions .