Fig. 2From: Extreme precipitation trends in Northeast China based on a non-stationary generalized extreme value modelThe MK trend analysis method of the EP in Northeast China in a early summer (ES) and b mid-summer (MS). UF is the MK trend analysis method statistic of positive order. UB is the MK trend analysis method statistic of reverse order. Zα represents the 95% percentile value of the standard normal distribution. The solid red line represents a horizontal line, indicating that there is no trend in the sequence. The red dashed line represents 95% confidence levelBack to article page