Input data set: WATCH (WFD)

Daily resolution climate data on a global 0.5°x0.5° lat-lon grid: Derived from the WATCH Project, based on the reanalysis data set ERA-40 and using the bias target GPCC. The data set covers the period 1901‐2001.

Related website:

When referring to the WATCH data set, the following paper should be cited:
Weedon, G.P., S.S. Gomes, P.P. Viterbo, W.J. Shuttleworth, E.E. Blyth, H.H. Österle, J.C. Adam, N.N. Bellouin, O.O. Boucher, and M.M. Best, 2011: Creation of the WATCH Forcing Data and Its Use to Assess Global and Regional Reference Crop Evaporation over Land during the Twentieth Century. J. Hydrometeor., 12, 823–848, doi: 10.1175/2011JHM1369.1

Data Type: Observed atmospheric climate
Simulation rounds: ISIMIP2a
Scenarios: hist-obs
Variables: tasmax, tas, tasmin, rlds, wind, rhs, rsds, prsn, ps, pr
Download Instructions

For ISIMIP participants, these files are available for download on the DKRZ server vre2 using the path /ISIMIP/ISIMIP2a/InputData/climate_co2/climate/HistObs/WATCH/.

For external users, these data are available on the ISIMIP node of the ESGF server (, more information here: