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Publication TypeData Reference (data sets, data web portals, etc...)
Citation Key625
Community Notes



Open Source or not?



Types of data provided





Temporal and spatial scale of provided data;


Details and Emissions scenarios

Sequence of steps


Output choices


8) WorldClim

Open source?

Interpolation using ANUSPLIN (thin plate smoothing splines) of ave monthly climate data from weather stations on a 30-arc second resol. grid – 1km2.

Downscaled data – projected changes in variables interpolated to 1km resolution grid and added to high resolution interpolated climate data for the “current period” (absol projected diff for temp and relative projected diff for precip are used) – Delta method.

- spatially interpolated gridded data – current observed; paleo climate data (downscaled from GCMs);

Current period 1950-2000;

- future projections

- mon total precip, mon mean temp, monthly mean Tmax and Tmin, 19 derived bioclimatic variables – used for ecological niche modeling. (more info here:

- 30 sec, 2.5, 5 and 10 minutes (approx. 19kmx19km) – lower resolution derived by aggregation of the 30 sec. data.

Grid layers in latitude / longitude coordinate reference system (not projected) and the datum is WGS84.

- monthly

- global

A2a, B2a (2020, 2050, 2080)

AR4 – can be obtained from CCAFS resource


- Current data: list of data files by variable for the globe or by 30 by 30 degree tiles and by resolution;

- generic grid format (lat by lon) in binary files, ESRI grids and GeoTIFF

AR4 data – can be obtained from the CCAFS (CIAT) website
(see also the CCAFS (CIAT) resource)
TAR data;

For more information on the downscaling method: Hijmans, R.J., S.E. Cameron, J.L. Parra, P.G. Jones and A. Jarvis, 2005. Very high resolution interpolated climate surfaces for global land areas. International Journal of Climatology 25: 1965-1978.

This resource allows access to only one dataset of downscaled climate projections.


Projects that used this resource: 

Data Tags

Climate Indices: 
Geographical Domain: 
Downscaling Method: 
Temporal Resolution: 
Data Output Format: