Multi-Source Weighted-Ensemble Precipitation (MSWEP) is a fully global historical precipitation dataset (1979–2019) with a 3‑hourly temporal and 0.1° spatial resolution.
Benefits of MSWEP
- MSWEP takes advantage of the complementary strengths of gauge‑, satellite‑, and reanalysis-based data to provide reliable precipitation estimates over the entire globe.
- In two comprehensive large-scale evaluations, MSWEP performed best overall (Beck et al., 2017; Beck et al., 2019).
- Truly global coverage (including ocean areas) at 3‑hourly 0.1° resolution (other satellite-based datasets such as CMORPH and IMERG are limited to latitudes <50/60°).
- Consistent precipitation record from 1979 until the near present, enabling trend and drought assessments.
- Daily (in addition to monthly) gauge corrections using observations from ~77,000 stations across the globe.
- When applying the daily gauge corrections, MSWEP accounts for differences in gauge reporting times.
MSWEP has been part of two comprehensive evaluation studies. In the first, 22 gridded precipitation datasets were validated using observations from ~70,000 gauges and hydrological modeling for ~9000 catchments globally:
- Beck, H. E., N. Vergopolan, M. Pan, V. Levizzani, A.I.J.M. van Dijk, G.P. Weedon, L. Brocca, F. Pappenberger, G.J. Huffman, and E.F. Wood: Global-scale evaluation of 22 precipitation datasets using gauge observations and hydrological modeling, Hydrology and Earth System Sciences 21(12), 6201–6217, 2017.
In the second, 26 precipitation datasets were evaluated using Stage-IV gauge-radar data for the CONUS:
- Beck, H. E., Pan, M., Roy, T., Weedon, G. P., Pappenberger, F., van Dijk, A. I. J. M., Huffman, G. J., Adler, R. F., and Wood, E. F.: Daily evaluation of 26 precipitation datasets using Stage-IV gauge-radar data for the CONUS, , 2019.
See the following paper for a detailed description of the MSWEP V2.2 methodology:
- Beck, H. E., Wood, E. F., Pan, M., Fisher, C. K., Miralles, D. M., van Dijk, A. I. J. M., McVicar, T. R., and Adler, R. F.: MSWEP V2 global 3‑hourly 0.1° precipitation: methodology and quantitative assessment, Bulletin of the American Meteorological Society 100(3), 473 500, 2019.
See the technical documentation for code examples on reading the data and the version history.
MSWEP is released under the CC BY-NC 4.0 license and thus may not be used for commercial purposes. For commercial use of MSWEP, please contact us. To apply for non-commercial access to MSWEP, please send us a request using the following form. Please note that each request is checked manually, so make sure that your answers are complete and correct.MSWEP request form
MSWEP is developed by Hylke Beck (Princeton University). The precipitation dataset developers are gratefully acknowledged for producing and making available their datasets. The work was supported through IPA support from the U.S. Army Corps of Engineers’ International Center for Integrated Water Resources Management (ICIWaRM), under the auspices of UNESCO.