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CRU TS4.02: Climatic Research Unit (CRU) Time-Series (TS) version 4.02 of high-resolution gridded data of month-by-month variation in climate (Jan. 1901- Dec. 2017)

Update Frequency: Not Planned
Latest Data Update: 2018-12-11
Status: Completed
Online Status: ONLINE
Publication State: Citable
Publication Date: 2019-02-18
DOI Publication Date: 2019-04-01
Download Stats: last 12 months
Dataset Size: 398 Files | 32GB

This dataset has been superseded. See Latest Version here

The gridded Climatic Research Unit (CRU) Time-series (TS) data version 4.02 data are month-by-month variations in climate over the period 1901-2017, provided on high-resolution (0.5x0.5 degree) grids, produced by CRU at the University of East Anglia.

The CRU TS4.02 variables are cloud cover, diurnal temperature range, frost day frequency, potential evapotranspiration (PET), precipitation, daily mean temperature, monthly average daily maximum and minimum temperature, and vapour pressure for the period January 1901 - December 2017.

The CRU TS4.02 data were produced using angular-distance weighting (ADW) interpolation. All version 3 releases used triangulation routines in IDL. Please see the release notes for full details of this version update. CRU TS4.02 is a full release, differing only in methodology from the parallel release, v3.26. Both are released concurrently to support comparative evaluations between these two versions, however, this will be the last release of version 3.

The CRU TS4.02 data are monthly gridded fields based on monthly observational data calculated from daily or sub-daily data by National Meteorological Services and other external agents. The ASCII and NetCDF data files both contain monthly mean values for the various parameters. The NetCDF versions contain an additional integer variable, ’stn’, which provides, for each datum in the main variable, a count (between 0 and 8) of the number of stations used in that interpolation. The missing value code for 'stn' is -999.

All CRU TS output files are actual values - NOT anomalies.

Citable as:  University of East Anglia Climatic Research Unit; Harris, I.C.; Jones, P.D. (2019): CRU TS4.02: Climatic Research Unit (CRU) Time-Series (TS) version 4.02 of high-resolution gridded data of month-by-month variation in climate (Jan. 1901- Dec. 2017). Centre for Environmental Data Analysis, 01 April 2019. doi:10.5285/b2f81914257c4188b181a4d8b0a46bff.
Abbreviation: Not defined
Keywords: CRU, CRU TS, atmosphere, earth science, climate


Previous Info:
No news update for this record
Previously used record identifiers:
No related previous identifiers.
Access rules:
Access to these data is available to any registered CEDA user. Please Login or Register for an account to gain access.
Use of these data is covered by the following licence: When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

The CRU TS 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. Previous releases of the CRU TS data include:

CRU TS 4.02 was provided to CEDA for archival in December 2018.

CRU TS 4.01 was provided to CEDA for archival in September 2017.

CRU TS 4.00 was provided to CEDA for archival in March 2017.

CRU TS 3.24.01 was provided to CEDA for archival in January 2017. This is the latest version available and is a replacement of the withdrawn dataset 3.24, it supersedes all previous data versions (which are available to allow user comparisons)

CRU TS 3.24 was provided to CEDA for archival in July 2016. This is the latest version available, superseding all previous data versions (which are available to allow user comparisons), v3.24 has been withdrawn.

CRU TS 3.23 was provided to CEDA in October 2015 by CRU. This is the latest version available, superseding all previous data versions (which are available to allow user comparisons).

CRU TS 3.22 was provided to CEDA for archival in July 2014 by CRU.

CRU TS 3.21 was provided to CEDA for archival in July 2013 by CRU.

CRU TS 3.20 was produced in December 2012.
In March 2013, CRU TS observation databases for TMP and PRE variables were provided by CRU. Others are in preparation. In july 2013, two errors were found in the PRE and WET variables of CRU TS v3.20. These have been repaired in CRU TS v3.21. Details of the errors found are available in the Release Notes in the archive.

CRU TS 3.10.01 In July 2012, systematic errors were discovered in the CRUTS v3.10 process. The effect was, in some cases, to reduce the gridded values for PRE and therefore WET. Values of FRS were found to be unrealistic in some areas due to the algorithms used for synthetic generation. The files (pre, frs and wet) were immediately removed from BADC. The corrected run for precipitation, based on the v3.10 precipitation station data, was generated as a direct replacement and given the version number 3.10.01. There were no corrected runs produced for wet and frs.

CRU TS 3.00 data files acquired directly from CRU in 2007. CRU provided the BADC with software to generate the CRU datasets in 2010, and this was used to produce CRU TS 3.10 at the BADC in early 2011.

Data Quality:
The data are quality controlled by the Climatic Research Unit (CRU) at the University of East Anglia. Details are given in the paper Harries et al. 2014 and the release notes, links to both can be found in the documentation.
File Format:
Data are provided in ASCII and NetCDF formats.

Citations: 3

The following citations have been automatically harvested from external sources associated with this resource where DOI tracking is possible. As such some citations may be missing from this list whilst others may not be accurate. Please contact the helpdesk to raise any issues to help refine these citation trackings.

Buchwal, A., Rachlewicz, G., Heim, B., & Juhls, B. (2023). Trees on the tundra: warmer climate might not favor prostrate Larix tree but Betula nana shrub growth in Siberian tundra (Lena River Delta). Agricultural and Forest Meteorology, 339, 109543.
Kumar, R., & Mishra, V. (2020). Increase in Population Exposure Due to Dry and Wet Extremes in India Under a Warming Climate. Earth’s Future, 8(12). Portico.
Suzuki, K., Park, H., Makarieva, O., Kanamori, H., Hori, M., Matsuo, K., Matsumura, S., Nesterova, N., & Hiyama, T. (2021). Effect of Permafrost Thawing on Discharge of the Kolyma River, Northeastern Siberia. Remote Sensing, 13(21), 4389.

Process overview

This dataset was generated by the computation detailed below.

UEA Climatic Research Unit (CRU) high resolution gridding software deployed on UEA CRU computer system for v4.00


This computation involved: UEA Climate Research Unit (CRU) High Resolution gridding software deployed on UEA Climate Research Unit (CRU) computer system. For details about the production of CRU TS and CRU CY datasets, please refer to Harris et al. (2020) - see Details/Docs tab, moderated by the Release Notes for v4.00 (which outline the new gridding process)

Input Description


Output Description


Software Reference


  • var_id: dtr
  • units: degrees Celsius
  • long_name: diurnal temperature range
  • units: days
  • var_id: frs
  • long_name: ground frost frequency
  • units: degrees_north
  • long_name: latitude
  • var_id: lat
  • units: degrees_east
  • long_name: longitude
  • var_id: lon
  • var_id: tmn
  • units: degrees Celsius
  • long_name: near-surface temperature minimum
  • units: mm/day
  • long_name: potential evapotranspiration
  • var_id: pet
  • var_id: pre
  • long_name: precipitation
  • units: mm/month
  • var_id: stn
  • long_name: time
  • var_id: time
  • units: days
  • var_id: wet
  • long_name: wet day frequency

Co-ordinate Variables

Temporal Range
Start time:
End time:
Geographic Extent