Input data set: Historical observed climate data

Daily-resolution observed climate data on a global (land and ocean) 0.5°x0.5° lat-lon grid.

PGMFD v.2 (Princeton) is from he Terrestrial Hydrology Group at Princeton University, based on the reanalysis data set NCEP/NCAR Reanalysis I and using the bias targets CRU, SRB, TRMM, GPCP & WMO and validated against GSWP2. The PGMFD v.2 data set covers the period 1901‐2012.

WATCH (WFD)
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.

WATCH+WFDEI
Based on the reanalysis data set ERA-Interim and using the bias target GPCC. The data set covers the period 1901‐2012, where the data for 1901-1978 are taken from WFD, and from 1979 onwards from WFDEI.GPCC



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

PGMFD v.2
When referring to this data set, the following paper should be cited: Sheffield, J., G. Goteti, and E. F. Wood, 2006: Development of a 50-yr high-resolution global dataset of meteorological forcings for land surface modeling, J. Climate, 19 (13), 3088-3111
http://hydrology.princeton.edu/data.pgf.php

WATCH (WFD)
When referring to this data set, the following paper should be cited: Weedon, G.P., Gomes, S., Viterbo, P., Österle, H., Adam, J.C., Bellouin, N., Boucher, O., and Best, M., 2010. The WATCH Forcing Data 1958-2001: a meteorological forcing dataset for land surface- and hydrological models. WATCH Tech. Rep. 22, 41p (available at www.eu-watch.org/publications , PDF).
http://www.waterandclimatechange.eu/about/watch-forcing-data-20th-century

WATCH+WFDEI
*Note* discontinuity in the data exists at the transition from WATCH to WFDEI, and results must be interpreted with caution.
When referring to this data set, the following paper should be cited:
Weedon, G. P., G. Balsamo, N. Bellouin, S. Gomes, M. J. Best, and P. Viterbo (2014), The WFDEI meteorological forcing data set: WATCH Forcing Data methodology applied to ERA-Interim reanalysis data, Water Resour. Res., 50, 7505–7514, doi:10.1002/2014WR015638.
http://www.waterandclimatechange.eu/about/watch-forcing-data-20th-century

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/.

For external users, these data are available on the ISIMIP node of the ESGF server (https://esg.pik-potsdam.de/projects/isimip/, more information here: https://www.isimip.org/gettingstarted/data-access/#for-external-non-participant-users).