Figure 1
The annual spatio-temporal distribution of precipitation occurrence frequency (λ0) in China (1961–2015). (a) mean of precipitation occurrence frequency. (b) gradient of precipitation occurrence frequency (slope, Unit: λ0/year). (c) precipitation region with significant deviation (p-value < 0.1) of precipitation occurrence frequency. (d) Mann–Kendall trend analysis and simple linear regression of precipitation occurrence frequency for China. (e) precipitation region with significant deviation (p-value < 0.1) of precipitation occurrence frequency in spring. (f) precipitation region with significant deviation (p-value < 0.1) of precipitation occurrence frequency in summer. (g) precipitation region with significant deviation (p-value < 0.1) of precipitation occurrence frequency in autumn. (h) precipitation region with significant deviation (p-value < 0.1) of precipitation occurrence frequency in winter.
