SDII for rain is defined as the ratio of annual or seasonal total rainfall to the number of days during the year or season when rainfall occurred (rain day : daily rain >= 1mm).
SDII [mm/day] Note: Part of South America where the reanalysis is very low correlated with observation (CPC Prcp.) is enclosed by heavy black lines on the following extreme days maps. See correlation map (monthly precipitation). MERRACFSR