Update of precipitation and temperature data for GRADE Rhine

The rainfall generator for the Rhine basin uses daily precipitation and temperature from 34 stations and average daily precipitation and temperature over 134 sub-basins (CHR-OBS data)for the period 1951-1995. The limited length of this period is an important source of uncertainty of the GRADE (Generator of Rainfall And Discharge Extremes)instrument. Therefore, it is recommend to base future simulations on the precipitation data from the HYRAS dataset (version 2.0) and temperature data from the E-OBS dataset. The HYRAS dataset is a gridded daily dataset for the period 1950-2006 that has been prepared by the German Weather Service. The E-OBS dataset is a European gridded daily observational dataset covering the period from 1950 to present, which is regularly updated.