Exploration of Use of Copulas in Analysing the Relationship between Precipitation and Meteorological Drought in Beijing, China

Table 4

Probabilities of SPEI classes when .

SPEI class
Extreme drought	0.136	0.080	0.042	0.029	0.024
Severe drought	0.180	0.126	0.075	0.055	0.046
Moderate drought	0.221	0.192	0.139	0.109	0.095
Near normal	0.430	0.547	0.647	0.675	0.682
Moderately wet	0.020	0.033	0.058	0.077	0.089
Very wet	0.009	0.015	0.026	0.036	0.042
Extremely wet	0.004	0.007	0.013	0.018	0.022