See summary of corresponding experiment. Model year 0 corresponds to real time year 1860. Years in the GRIB header are being counted from 0-99, 0-55, 0-84. This dataset contains 12H values from 01-Jan-1860 to 30-AUG-2069. Time resolution increased (6H values) from 01-SEP-2069 to 30-MAR-2091 (in the third block 0-84). Starting from 01-APR-2091 the dataset contains 12H values.