A Comprehensive Analysis of the Changes in Precipitation Patterns over Beijing during 1960–2012

Table 3

Trend test results of the monthly, seasonal, and annual precipitation during 1960–2012 tested by the M-K method and Sen’s slope method. The uncertainty range covered from 5% to 95% between the minimum and maximum values of Sen’s slope.

	Z value	Sen’s slope (mm/a)	Minimum	Maximum
Jan	−1.695	−0.009	−0.018	0
Feb	−1.918	−0.043	−0.113	−0.007
Mar	−1.036	−0.055	−0.111	0.067
Apr	1.365	0.148	−0.060	0.265
May	2.179	0.379	0.146	0.476
Jun	1.289	0.465	−0.375	0.724
Jul	−1.971	−1.227	−2.200	−0.122
Aug	−2.148	−1.401	−3.250	−0.892
Sep	0.905	0.248	−0.350	0.550
Oct	0.721	0.099	−0.225	0.207
Nov	0.744	0.037	−0.077	0.075
Dec	1.204	0.011	−0.005	0.033
Spring	2.086	0.535	0.025	1.025
Summer	−2.202	−2.150	−4.136	−0.344
Autumn	1.243	0.569	−0.304	1.250
Winter	0.184	0.007	−0.134	0.102
Annual	−0.767	−0.861	−3.159	1.344

Note. Statistically significant trends at the 10% and 5% significance levels, respectively.