The latest version is V2 (released July 23, 2017)
Multi-Source Weighted-Ensemble Precipitation (MSWEP) retrospective is a new fully global precipitation dataset (1979–2016) with a high 3-hourly temporal and 0.1° spatial resolution. The dataset is unique in that it takes advantage of a wide range of data sources, including gauges, satellites, and atmospheric reanalysis models, to obtain the best possible precipitation estimates at global scale.
The dataset has been validated at global scale using precipitation observations from ~60,000 gauges and hydrological modeling for ~9000 catchments (Beck et al., 2017b). MSWEP was found to perform better overall compared with other precipitation datasets such as CPC Unified, CHIRPS, CMORPH-CRT, GPCP-1DD, GSMaP, PERSIANN-CCS, PERSIANN-CDR, WFDEI-CRU, and TMPA 3B42. MSWEP was selected as the main precipitation forcing for the state-of-the-art evaporation model GLEAM and for Tier-2 of the EU-FP7 project eartH2Observe.
For more information about MSWEP V1, see the following open-access paper:
- Beck, H.E., A.I.J.M. van Dijk, V. Levizzani, J. Schellekens, D.G. Miralles, B. Martens, A. de Roo (2016): MSWEP: 3-hourly 0.25° global gridded precipitation (1979–2015) by merging gauge, satellite, and reanalysis data, Hydrology and Earth System Sciences, .
The paper describing and validating the latest version of the dataset (V2) is currently in preparation. The most important changes in V2 include: (i) the use of cumulative distribution function matching to correct the spurious drizzle and attenuated peaks evident in V1; (ii) increasing the spatial resolution from 0.25° to 0.1°; (iii) the inclusion of ocean areas; (iv) the addition of precipitation data from the NCEP-CFSR reanalysis; (v) the addition of infrared-based precipitation estimates for the pre-TRMM era to supplement the reanalysis and gauge data; (vi) the addition of 0.1° daily interpolated gauge data, to replace the coarse 0.5° CPC Unified and GPCC datasets; (vii) the use of a daily gauge correction scheme that accounts for regional differences in the 24-hour UTC boundary of gauge reports, to minimize timing mismatches when applying the daily gauge corrections; and (viii) extension of the data record to 2016.
The latest MSWEP technical documentation, including the version history and examples on how to read the data with MATLAB and Python, can be viewed here.
By using MSWEP in any publication you agree to cite Beck et al. (2017a). Please read the technical documentation carefully before attempting to use the data. Enter your name, affiliation, and email address to reveal the URL for downloading the data.
MSWEP may not be used for commercial or business applications. MSWEP is being developed by Hylke Beck (Princeton University, Princeton, NJ, USA). The precipitation dataset developers are gratefully acknowledged for producing and making available their datasets. The work was supported through IPA support for the first author from the U.S. Army Corps of Engineers’ International Center for Integrated Water Resources Management (ICIWaRM), under the auspices of UNESCO. By using MSWEP in any publication you agree to cite Beck et al. (2017a).