Table 5 March-June validation results for the CenTrends kriging process and Shepard's interpolator

From: The Centennial Trends Greater Horn of Africa precipitation dataset

[%]

1900–1920

1921–1940

1941–1960

1961–1980

1981–1999

2000–2014

Kriging+CenTrends Data

 MAE/Mean [%]

21

20

20

20

21

16

 MAE [mm]

76

72

70

68

73

56

Shepard’s Interpolator+GPCC Data

 MAE/Mean [%]

35

35

31

32

31

31

 MAE [mm]

123

123

110

115

110

107

Shepard’s Interpolator+CenTrends Data

 MAE/Mean [%]

23

21

21

20

21

22

 MAE [mm]

81

75

73

70

76

77

100*MAE/MAE [%]

 Kriging/GPCC [%]

61

58

63

59

67

70

 Kriging/Shep [%]

94

95

95

96

97

97

  1. CenTrends kriging errors are based one take-one-out cross-validation. The Shepard's interpolation results are based on GPCC 0.5° observations interpolated to the station archive locations. The third set of statistics compares CenTrends observations with cross-validated estimates based on CenTrends data and the Shepard interpolator. The 2nd to last row reports the relative performance of the Kriging+CenTrends Data and Shepard's Interpolator+GPCC Data experiments. The final row compares the Kriging+CenTrends Data and Shepard's Interpolator+CenTrends Data experiments. The GPCC Data results are accumulated over 1901–1920 and 2000–2010.
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