CRU JRA v2.2: A forcings dataset of gridded land surface blend of Climatic Research Unit (CRU) and Japanese reanalysis (JRA) data; Jan.1901 - Dec.2020.

The CRU JRA V2.2 dataset is a 6-hourly, land surface, gridded time series of ten meteorological variables produced by the Climatic Research Unit (CRU) at the University of East Anglia (UEA), and is intended to be used to drive models. The variables are provided on a 0.5 deg latitude x 0.5 deg longitude grid, the grid is near global but excludes Antarctica (this is same as the CRU TS grid, though the set of variables is different). The data are available at a 6 hourly time-step from January 1901 to December 2020.

The dataset is constructed by regridding data from the Japanese Reanalysis data (JRA) produced by the Japanese Meteorological Agency (JMA), adjusting where possible to align with the CRU TS 4.05 data (see the Process section and the ReadMe file for full details).

The CRU JRA data consists of the following ten meteorological variables: 2-metre temperature, 2-metre maximum and minimum temperature, total precipitation, specific humidity, downward solar radiation flux, downward long wave radiation flux, pressure and the zonal and meridional components of wind speed (see the ReadMe file for further details).

The CRU JRA dataset is intended to be a replacement of the CRU NCEP forcing dataset. The CRU JRA dataset follows the style of Nicolas Viovy's original CRU NCEP dataset rather than that which is available from UCAR. A link to the CRU NCEP documentation for comparison is provided in the documentation section.

If this dataset is used in addition to citing the dataset as per the data citation string users must also cite the following:

Harris, I., Osborn, T.J., Jones, P. et al. Version 4 of the CRU TS

monthly high-resolution gridded multivariate climate dataset.

Sci Data 7, 109 (2020). https://doi.org/10.1038/s41597-020-0453-3

Harris, I., Jones, P.D., Osborn, T.J. and Lister, D.H. (2014), Updated

high-resolution grids of monthly climatic observations - the CRU TS3.10

Dataset. International Journal of Climatology 34, 623-642.

Kobayashi, S., et. al., The JRA-55 Reanalysis: General Specifications and

Basic Characteristics. J. Met. Soc. Jap., 93(1), 5-48

https://dx.doi.org/10.2151/jmsj.2015-001

Date (Publication): 2021-07-02T12:33:42

Date (Creation): 2021-07-02T12:33:42

Citation identifier: https://catalogue.ceda.ac.uk/uuid/4bdf41fc10af4caaa489b14745c665a6

Citation identifier: NERC EDS Centre for Environmental Data Analysis / 4bdf41fc10af4caaa489b14745c665a6

Point of contact

Organisation name	Individual name	Electronic mail address	Role
University of East Anglia Climatic Research Unit (CRU)		cru@uea.ac.uk	Author
Unavailable	Harris, Ian C	Unavailable	Author
NERC EDS Centre for Environmental Data Analysis		support@ceda.ac.uk	Custodian
University of East Anglia Climatic Research Unit (CRU)		cru@uea.ac.uk	Owner
NERC EDS Centre for Environmental Data Analysis		support@ceda.ac.uk	Distributor
Unavailable	Harris, Ian C	Unavailable	Principal investigator
Unavailable	Jones, Philip D.	Unavailable	Principal investigator
NERC EDS Centre for Environmental Data Analysis		support@ceda.ac.uk	pointofContact
Unavailable	Harris, Ian C	Unavailable	pointofContact
NERC EDS Centre for Environmental Data Analysis		support@ceda.ac.uk	Publisher

Maintenance and update frequency: Not planned

Update scope: Dataset

Keywords

CRU
JRA
CRUJRA
atmosphere
earth science
climate

GEMET - INSPIRE themes, version 1.0

atmospheric conditions

Access constraints: Other restrictions

Other constraints: Access to these data is available to any registered CEDA user. Please Login or Register for a CEDA account to gain access.

Use constraints: Other restrictions

Other constraints: Under the following licence http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/, appropriate use of these data may fall under any use. This message is intended as guidance, always read the full licence. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.

Spatial representation type: Grid

Language: English

Topic category

Climatology, meteorology, atmosphere

Begin date: 1901-01-01T00:00:00

End date: 2020-12-31T23:59:59

Unique resource identifier: WGS 84

Distribution format

Name	Version
The data are provided as gzipped NetCDF files, with one file per variable, per year.

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
NERC EDS Centre for Environmental Data Analysis		support@ceda.ac.uk	Distributor

OnLine resource

Protocol	Linkage	Name
	https://catalogue.ceda.ac.uk/uuid/4bdf41fc10af4caaa489b14745c665a6	CEDA Data Catalogue Page

OnLine resource

Protocol	Linkage	Name
	http://data.ceda.ac.uk/badc/cru/data/cru_jra/cru_jra_2.2/	DOWNLOAD

OnLine resource

Protocol	Linkage	Name
	http://help.ceda.ac.uk/article/4472-cru-data-user-guide	CRU User Guide

OnLine resource

Protocol	Linkage	Name
	http://www.cru.uea.ac.uk/data/	Climate Research Unit (CRU) data Homepage

OnLine resource

Protocol	Linkage	Name
	ftp://nacp.ornl.gov/synthesis/2009/frescati/model_driver/cru_ncep/analysis/readme.htm	CRU NCEP documentation

OnLine resource

Protocol	Linkage	Name
	http://dx.doi.org/10.1002/joc.3711	Harris, I., Jones, P.D., Osborn, T.J. and Lister, D.H. (2014), Updated high-resolution grids of monthly climatic observations – the CRU TS3.10 Dataset. Int. J. Climatol., 34: 623–642. doi:10.1002/joc.3711

OnLine resource

Protocol	Linkage	Name
	https://dx.doi.org/10.2151/jmsj.2015-001	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 and Basic Characteristics. J. Met. Soc. Jap., 93(1), 5-48

OnLine resource

Protocol	Linkage	Name
	https://crudata.uea.ac.uk/cru/data/hrg/Revised_Appendix_3_CLD.pdf	This is a revision to the paper: Harris, I., Jones, P.D., Osborn, T.J. and Lister, D.H. (2014), Updated highresolution grids of monthly climatic observations – the CRU TS3.10 Dataset. Int. J. Climatol., 34: 623–642. doi: 10.1002/joc.3711

OnLine resource

Protocol	Linkage	Name
	http://data.ceda.ac.uk/badc/cru/doc/File_Format_CRU_TS_v4.pdf	CRU TS 4 File Formats explained.

OnLine resource

Protocol	Linkage	Name
	https://doi.org/10.1038/s41597-020-0453-3	Harris, I., Osborn, T.J., Jones, P. et al. Version 4 of the CRU TS monthly high-resolution gridded multivariate climate dataset. Sci Data 7, 109 (2020). https://doi.org/10.1038/s41597-020-0453-3

Hierarchy level: Dataset

Conformance result

Title: Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services

Date (Publication): 2010-12-08

Statement: The CRU JRA data are produced by the Climatic Research Unit (CRU) at the University of East Anglia and are passed to the Centre for Environmental Data Analysis (CEDA) for long-term archival and distribution.

Metadata

File identifier: 4bdf41fc10af4caaa489b14745c665a6 XML

Metadata language: English

Character set: UTF8

Parent identifier: CRU JRA: Collection of CRU JRA forcing datasets of gridded land surface blend of Climatic Research Unit (CRU) and Japanese reanalysis (JRA) data.
863a47a6d8414b6982e1396c69a9efe8

Hierarchy level: Dataset

Date stamp: 2025-06-16T02:21:38

Metadata standard name: UK GEMINI

Metadata standard version: 2.3

Metadata author

Organisation name	Individual name	Electronic mail address	Role
NERC EDS Centre for Environmental Data Analysis		support@ceda.ac.uk	Point of contact

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