- rainfall estimates
- anomalies with respect to the 1983-2012 (30-year) average
TAMSAT rainfall estimates are provided at 0.0375 x 0.0375 degree spatial resolution (~4km) for all land points on the African continent, including Madagascar.
Estimates are also given for parts of the Middle East, although as the rainfall over these regions is not always convective in nature, no guarantee can be given to the reliability of such estimates.
TAMSAT rainfall estimates are provided at the following time steps:
- pentadal (5-day)
- dekadal (10-day)
- seasonal (Dec-Feb, Mar-May, Jun-Aug, Sep-Nov)
Rainfall estimates are available from Jan 1983 to near-real time.
Estimates are available within 2 days at the end of each pentad (i.e. 2nd, 7th, 12th, 17th, 22nd and 27th). ***Please note that due to current technical problems, TAMSAT estimates can only be guaranteed to be available within 5-day of the end of each pentad***.
Estimates are provided in netCDF format. Quick look images are also provided in PNG format.
The latest version is 3.0 (released January 2017), which supersedes V2.0.
TAMSAT V3.0 overcomes two problems associated with V2.0:
- spatial artefacts arising from the use of rectangular calibration zones
- a dry bias (in the order of 20%)
As such, we recommend users who are currently using V2.0 to switch to V3.0.
Estimates can be downloaded in several ways:
We suggest users should cite the following publications when using TAMSAT data:
- Maidment, R. I., D. Grimes, E. Black, E. Tarnavsky, M. Young, H. Greatrex, R. P. Allan et al. (2017) A new, long-term daily satellite-based rainfall dataset for operational monitoring in Africa Nature Scientific Data 4: 170063 DOI:10.1038/sdata.2017.63.
- Tarnavsky, E., Grimes, D., Maidment, R., Black, E., Allan, R., Stringer, M., Chadwick, R. and Kayitakire, F., (2014). Extension of the TAMSAT Satellite-based Rainfall Monitoring over Africa and from 1983 to present. Journal of Applied Meteorology and Climatology, 53(12): 2805-2822. DOI: 10.1175/JAMC-D-14-0016.1.
- Maidment, R., Grimes, D., Allan, R., Tarnavsky, E., Stringer, M., Hewison, T., Roebeling, R., and Black, E. (2014). The 30-year TAMSAT African Rainfall Climatology and Time-series (TARCAT) Data Set. Journal of Geophysical Research: Atmospheres, 119:10,619-10,644. DOI: 10.1002/2014JD021927.
All TAMSAT data are free to use and are released for operational, research and commercial use under a creative commons license.