For each MIROC gridcell: An average precipitation was calculated
for 1961-1990 based on the simulated transient historical data.
Result is a 12 month simulated climatology at the scale of the MIROC grid.
For each forecast month a ratio anomaly was calculated (ex.
January_2021 / Mean_historical_January). Anomalies were capped at
5.0. Result is a 100 year monthly set of precipitation anomalies at
the scale of the MIROC grid.
For each forecast month: Gridded anomalies were interpolated to a
½ degree grid using a bilinear interpolation. For each
forecast month and each ½ degree gridcell: The anomaly for
that month is mulitplied to the CRU historical precipitation (ex.
CRU_Mean_January_1961-1990 x January_2021_anomaly). Result is
monthly precipitation data for the years 2001-2100 at the ½
degree grid.
An average of the years 2070-2099 was produced. Result is a
single map of the average sum annual precipitation values.