Input data set: 20CRv3-ERA5

Climate related forcing: Atmospheric forcings - standard.

20CRv3-ERA5 global meteorological forcing data processed for ISIMIP3a. Daily data covering 1801-1900 (spinclim), 1851-1900 (transclim) and 1901-2021 (obsclim, counterclim) on a 0.5°x0.5° lat-lon grid

Combination of ERA5 for 1979-2021 with 20CRv3 (ensemble member 1) homogenized to ERA5 for 1901-1978. The homogenization was done in the same way as for GSWP3-W5E5.

When referring to the ERA5 reanalysis data, the following paper should be cited:
- Hersbach, H, Bell, B, Berrisford, P, et al. The ERA5 global reanalysis. Q J R Meteorol Soc. 2020; 146: 1999– 2049. https://doi.org/10.1002/qj.3803

When referring to the NOAA-CIRES-DOE 20th Century Reanalysis version 3 data (20CRv3), the following papers should be cited:
- Slivinski, LC, Compo, GP, Whitaker, JS, et al. Towards a more reliable historical reanalysis: Improvements for version 3 of the Twentieth Century Reanalysis system. Q J R Meteorol Soc. 2019; 145: 2876– 2908.https://doi.org/10.1002/qj.3598
- Compo, G.P., Whitaker, J.S., Sardeshmukh, P.D., Matsui, N., Allan, R.J., Yin, X., Gleason, B.E., Vose, R.S., Rutledge, G., Bessemoulin, P., Brönnimann, S., Brunet, M., Crouthamel, R.I., Grant, A.N., Groisman, P.Y., Jones, P.D., Kruk, M.C., Kruger, A.C., Marshall, G.J., Maugeri, M., Mok, H.Y., Nordli, Ø., Ross, T.F., Trigo, R.M., Wang, X.L., Woodruff, S.D. and Worley, S.J. (2011), The Twentieth Century Reanalysis Project. Q.J.R. Meteorol. Soc., 137: 1-28. https://doi.org/10.1002/qj.776