Dynamical Regional Downscaling
Using the JRA-55 Reanalysis (DSJRA-55)
1. IDENTIFICATION INFORMATION
Name

Dynamical Regional Downscaling Using the JRA-55 Reanalysis (DSJRA-55)

Metadata
Identifier

DSJRA5520230727074847-DIAS20221121113753-en

2. CONTACT
2.1 CONTACT on DATASET
Name

Numerical Prediction Division, Information Infrastructure Department

Organization

Japan Meteorological Agency

Address

3-6-9 Toranomon, Minato City, Tokyo, 105-8431, Japan

E-mailjra@met.kishou.go.jp

2.2 CONTACT on PROJECT
2.2.1 Data Integration and Analysis System
Name

DIAS Office

Organization

Japan Agency for Marine-Earth Science and Technology

Address

3173-25, Showa-Cho, Kanazawa-ku, Yokohama-shi, Kanagawa, 236-0001, Japan

E-maildias-office@diasjp.net

3. DOCUMENT AUTHOR
Name

Numerical Prediction Division, Information Infrastructure Department

Organization

Japan Meteorological Agency

4. DATASET CREATOR
Name

Numerical Prediction Division, Information Infrastructure Department

Organization

Japan Meteorological Agency

5. DATE OF THIS DOCUMENT
2023-07-27

6. DATE OF DATASET1�publication : 2017-03-13

7. DATASET OVERVIEW
7.1 Abstract
DSJRA-55 (Kayaba et al. 2016) is a dynamical regional downscaling using the Japanese 55-year
Reanalysis (JRA-55, Kobayashi et al. 2015) dataset for initial and boundary conditions. The Japan
Meteorological Agency (JMA) has conducted DSJRA-55 for the period from 1958 to 2012 to produce
a climate dataset with a horizontal resolution of 5 km that appropriately represents phenomena
associated with Japan's uneven terrain. DSJRA-55 is presented as a dataset helping to clarify
climatic characteristics (such as trends of extreme phenomena) and supporting case studies onextreme events in Japan.

7.2 Topic Category(ISO19139)
�climatologyMeteorologyAtmosphere

7.3 Temporal Extent
Begin Date

1958-01-01

End Date

2012-12-31

Temporal
Characteristics

Hourly7.4 Geographic Bounding Box
Northlatitudebound 48.8008

West
longitudebound 107.498

Eastboundlongitude156.151South
latitudebound 19.6995

7.5 Grid
Dimension Name

Dimension
Size Resolution Unit
(slice number ofthe dimension)

row

721

5 (km)

column577

5 (km)

vertical1625-100 (hPa)

7.6 Geographic Description
7.7 Keywords

2

7.7.1 Keywords on Dataset
Keyword Type

Keyword

KeywordName

thesaurus

theme

Atmosphere

GCMD_science

theme

Models

GCMD_platformtheme

Climate, Weather

GEOSS

7.7.2 Keywords on Project
7.7.2.1 Data Integration and Analysis System
Keyword Type

Keyword

KeywordNamethesaurus

theme

DIAS &amp;gt; Data Integration and Analysis System

No_Dictionary

7.8 Online Resource�JRA project website : http://jra.kishou.go.jp/
�Dynamical Regional Downscaling Using the JRA-55 Reanalysis (DSJRA-55) website (in English) :http://jra.kishou.go.jp/DSJRA-55/index_en.html
�Dynamical Regional Downscaling Using the JRA-55 Reanalysis (DSJRA-55) website (in Japanese) :http://jra.kishou.go.jp/DSJRA-55/index_ja.html
�DSJRA-55ProductUsers
index_en.html#MANUALHandbook(inEnglish):

http://jra.kishou.go.jp/DSJRA-55/

�DSJRA-55
ProductUsers
index_ja.html#MANUAL

Handbook(inJapanese):

http://jra.kishou.go.jp/DSJRA-55/

�file download : https://data.diasjp.net/dl/storages/filelist/dataset:284

7.9 Data Environmental Information
7.10 Distribution Information
nameversion

GRIB

2

specification

8. DATA PROCESSING
9. DATA REMARKS
10. DATA POLICY3

10.1 Data Policy by the Data Provider(1) Users should provide user information including name, affiliation, e-mail address and purposeof data use.
(2) Users should not distribute the Products to any third party without JMA's prior consent. Useof the Products for any commercial purposes is also prohibited.
(3) The source of the Products should be duly acknowledged in scientific or technical papers,
publications, press releases or other communications regarding the Products.
(4) Users should provide JMA with a copy of their scientific or technical papers, publications,press releases or other communications regarding the Products.
Disclaimer
Please note that although JMA has paid the closest attention to produce the Products, JMA assumes
no responsibility regarding the reliability of the Products. JMA is not responsible to you for any
damage that may be caused by the use of the Products on this site.

10.2 Data Policy by the Project
10.2.1 Data Integration and Analysis System
If data provider does not have data policy, DIAS Terms of Service (https://diasjp.net/en/terms/)
and DIAS Privacy Policy (https://diasjp.net/en/privacy/) apply.
If there is a conflict between DIAS Terms of Service and data provider's policy, the data provider'spolicy shall prevail.

11. LICENSE
12. DATA SOURCE ACKNOWLEDGEMENT
12.1 Acknowledge the Data Provider
The source of the Products should be duly acknowledged in scientific or technical papers,
publications, press releases or other communications regarding the Products.
Example:The datasets used for this study are provided from the Japan Meteorological Agency (JMA).

12.2 Acknowledge the Project
12.2.1 Data Integration and Analysis System
If you plan to use this dataset for a conference presentation, paper, journal article, or reportetc., please include acknowledgments referred to following examples. If the data provider describes
examples of acknowledgments, include them as well.

4" In this study, [Name of Dataset] provided by [Name of Data Provider] was utilized. This dataset
was also collected and provided under the Data Integration and Analysis System (DIAS), which wasdeveloped and operated by a project supported by the Ministry of Education, Culture, Sports, Scienceand Technology. "13. REFERENCES
Kayaba, N., T. Yamada, S. Hayashi, K. Onogi, S. Kobayashi, K. Yoshimoto, K. Kamiguchi, and K.
Yamashita, 2016: Dynamical Regional Downscaling Using the JRA-55 Reanalysis (DSJRA-55). SOLA, 12,1-5. http://doi.org/10.2151/sola.2016-001.
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 andbasic characteristics. J. Meteor. Soc. Japan, 93, 5-48. http://dx.doi.org/10.2151/jmsj.2015-001.

5