AMO is recognized as North Atlantic Decadal variability with estimated period of 60 to 80 years. It uses mean anomalies of sea surface temperature mainly over 0 to 80°N across North Atlantic Basin.( https://climatedataguide.ucar.edu/climate-data/atlantic-multi-decadal-oscillationamo) The Atlantic Multidecadal Oscillation (AMO) in relation to North Atlantic decadal variability used to correlates rainfall events in summer and monsoon period due to its decadal scale oscillations effects. (Krishnamurthy & Krishnamurthy, 2016) Extreme value theory (EVT) in the field of statistics for stochastic assessment of extreme deviations of climate variables from the median of the probability distributions. The EVT and extremes from the stochastic domain follow three types of distributions (Gumbell, Frechet, and Weibull). This study used a Generalized extreme value distribution for nonstationary assessment of extreme rainfall events developed within EVT using three distributions. (https://www.ncl.ucar.edu/Applications/extreme_value.shtml)
