. Author manuscript; available in PMC: 2020 Aug 3.

Published in final edited form as: J Hydrometeorol. 2017 Jun 21;18(6):1783–1798. doi: 10.1175/JHM-D-16-0195.1

Table 7:

Means and trends of GHCN-D, LI2013, and NARR seasonal total precipitation. An x denotes a combination of time period and dataset that is not available. The trends are calculated from simple linear regression. The symbols, * and #, denote the trend is significant at 0.05 level using parametric method (t-test) and nonparametric method (Mann-Kendall test), respectively.

	Units	1901–2014	1915–2011	1979–2014	1979–2011
Spring Mean
GHCN-D	mm yr⁻¹	267.3	262.7	282.4	283.6
LI2013	mm yr⁻¹	x	273	x	290.5
NARR	mm yr⁻¹	x	x	272.8	277.3
Spring Trend
GHCN-D	mm decade⁻¹	0.9	2.6	7.0	11.1
LI2013	mm decade⁻¹	x	3.6*	x	9.2
NARR	mm decade⁻¹	x	x	4.1	−2.8
Summer Mean
GHCN-D	mm yr⁻¹	302.4	299.6	309.8	307.1
LI2013	mm yr⁻¹	x	302.5	x	315
NARR	mm yr⁻¹	x	x	279.5	281.2
Summer Trend
GHCN-D	mm decade⁻¹	0.9	1.8	17.0*^#	16.3
LI2013	mm decade⁻¹	x	2.1	x	16
NARR	mm decade⁻¹	x	x	2.9	7.4
Fall Mean
GHCN-D	mm yr⁻¹	262.3	268.3	285.2	286.9
LI2013	mm yr⁻¹	x	272.6	x	296.8
NARR	mm yr⁻¹	x	x	261.5	265.2
Fall Trend
GHCN-D	mm decade⁻¹	4.8*^#	5.9*^#	9.9	16.4
LI2013	mm decade⁻¹	x	5.9*^#	x	15.5
NARR	mm decade⁻¹	x	x	−1	5.7
Winter Mean
GHCN-D	mm yr⁻¹	233.9	228.6	231.5	230.1
LI2013	mm yr⁻¹	x	239.2	x	236.5
NARR	mm yr⁻¹	x	x	223.4	223.1
Winter Trend
GHCN-D	mm decade⁻¹	−1.8	0.1	17.7*^#	20.1*^#
LI2013	mm decade⁻¹	x	1.2	x	20.3*^#
NARR	mm decade⁻¹	x	x	11.5	15.9*^#