Gridded data are available for a range ofvariablesin NetCDF and GeoTiff formats. The NetCDF datasets are arranged in annual blocks where each file contains all of the grids for the selected year and variable. The GeoTiff datasets are not arranged in blocks; each file contains a single grid for the selected day (or month in the case of monthly rainfall) and variable.
Please note SILO also providespointdatasets. Temporal (point) data at individual grid locations can be downloaded using ourweb interface or web API.
Each annual NetCDF file (for daily variables) is approximately 410 MB in size. The annual NetCDF files for monthly rainfall are smaller (14 MB) because they only contain 12 monthly grids, instead of 365 or 366 daily grids.
Daily / Monthly GeoTiff files:
To ensure you obtain the most recent version of the selected dataset, please clear your browser cache before downloading.
Gridded data are available for:
Mean sea level pressure: 1957 - current year
Evaporation - Class A pan: 1970 - current year
All other variables: 1889 - current year
How else can I access the data?
The gridded data are stored on Amazon S3. The NetCDF data are arranged in a directory structure of the form annual/<variable>/<year>.<variable>.nc where variable is the variable's short name. Similarly, the GeoTiff data are arranged in a directory structure of the form daily/<variable>/<year>/<year><month><day>.<variable>.tif (daily variables), and monthly/<variable>/<year>/<year><month>.<variable>.tif (monthly variables). The datasets can be accessed by the following methods:
Detailed log files describing the observational data used to construct each gridded raster are stored onAmazon S3. The log files are arranged in a directory structure of the form interpolation-logs/<variable>/<year>/<date>.<variable>.log wherevariableis thevariable's short nameanddateis the date inyyyymmddformat (oryyyymmfor monthly variables). The log files can be accessed using either the AWS command line or direct access methods described above.
How can I interact with the NetCDF gridded data?
Use the tools and examples provided below to get started.
The example shows how to import a NetCDF dataset and analyse.