CRU CY3.21: Climatic Research Unit (CRU) Year-by-Year Variation of Selected Climate Variables by CountrY (CY) version 3.21 (Jan. 1901 - Dec. 2012)

The CRU CY3.21 dataset consists of country averages at a monthly, seasonal and annual frequency, for ten climate variables in 289 countries for the period Jan. 1901 to Dec. 2012. It was produced in 2013 by the Climatic Research Unit (CRU) at the University of East Anglia.

Spatial averages are calculated using area-weighted means. Variables include cloud cover (cld), diurnal temperature range (dtr), frost day frequency (frs), precipitation (pre), daily mean temperature (tmp), monthly average daily maximum (tmx) and minimum (tmn) temperature, vapour pressure (vap), Potential Evapo-transpiration (pet) and wet day frequency (wet).

CRU CY3.21 is derived directly from the CRU TS3.21 dataset. Version numbering is matched between the two datasets. The data are available as text files with the extension '.per' and can be opened by most text editors.

To understand the CRU-CY3.21 dataset, it is important to understand the construction and limitations of the underlying dataset, CRU TS3.21. It is therefore recommended that all users read the paper referenced below (Harris et al, 2014).

CRU CY data are available for download to all CEDA users.

Date (Publication): 2013-09-25T20:21:12

Date (Creation): 2013-09-25T20:21:12

Citation identifier: https://catalogue.ceda.ac.uk/uuid/8482b5af7dded1f1b94a4a9ac4ce8a26

Citation identifier: NCAS British Atmospheric Data Centre (NCAS BADC) / 8482b5af7dded1f1b94a4a9ac4ce8a26

Citation identifier: doi / http://dx.doi.org/10.5285/f9d4b545-ded2-423c-b61c-f8a67609adf7

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
NCAS British Atmospheric Data Centre (NCAS BADC)		badc@rl.ac.uk	Custodian
University of East Anglia Climatic Research Unit (CRU)		cru@uea.ac.uk	Owner
NCAS British Atmospheric Data Centre (NCAS BADC)		badc@rl.ac.uk	Distributor
Unavailable	Harris, Ian C	Unavailable	Principal investigator
Unavailable	Jones, Philip D.	Unavailable	Principal investigator
NCAS British Atmospheric Data Centre (NCAS BADC)		badc@rl.ac.uk	pointofContact
NCAS British Atmospheric Data Centre (NCAS BADC)		badc@rl.ac.uk	Publisher

Maintenance and update frequency: Not planned

Update scope: Dataset

Keywords

Not defined

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: 2012-12-31T00:00:00

Unique resource identifier: WGS 84

Distribution format

Name	Version
The CRU CY data are provided as text files with the extension ".per", most text editors will open these files. See the linked file formats guide for more information.

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
NCAS British Atmospheric Data Centre (NCAS BADC)		badc@rl.ac.uk	Distributor

OnLine resource

Protocol	Linkage	Name
	https://catalogue.ceda.ac.uk/uuid/8482b5af7dded1f1b94a4a9ac4ce8a26	CEDA Data Catalogue Page

OnLine resource

Protocol	Linkage	Name
	http://data.ceda.ac.uk/badc/cru/data/cru_cy/cru_cy_3.21	DOWNLOAD

OnLine resource

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

OnLine resource

Protocol	Linkage	Name
	http://dx.doi.org/10.1002/joc.3711	Harris et al. (2014) Reference

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://data.ceda.ac.uk/badc/cru/doc/CRU_CY_File_formats_guide.pdf	CRU CY File formats guide

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: CRU CY 3.21 data files acquired directly from CRU in 2013.

Metadata

File identifier: 8482b5af7dded1f1b94a4a9ac4ce8a26 XML

Metadata language: English

Character set: UTF8

Parent identifier: Climatic Research Unit (CRU): Year-by-Year Variation of Selected Climate Variables by CountrY (CY) v3
116aed45b5f0d15ddc3b0e753837e8c9

Hierarchy level: Dataset

Date stamp: 2025-07-20T02:02:24

Metadata standard name: UK GEMINI

Metadata standard version: 2.3

Metadata author

Organisation name	Individual name	Electronic mail address	Role
NCAS British Atmospheric Data Centre (NCAS BADC)		badc@rl.ac.uk	Point of contact

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