Table 2 Specifications of the meteorological data used and the calculated ET0 on the monthly scale.

From: Comparing three types of data-driven models for monthly evapotranspiration prediction under heterogeneous climatic conditions

Station

Variable

Training period (1995–2012)

Testing Period (2013–2018)

Min.*

Max

Average

STD

Min

Max

Average

STD

Bandar Anzali

Tmin (°C)

0.80

25.40

14.41

6.85

3.10

26.10

14.80

6.84

Tmax (°C)

5.30

31.80

19.24

7.14

8.40

32.80

20.12

7.57

Tmean (°C)

3.00

28.40

16.82

6.99

5.80

29.30

17.46

7.18

RHmax (%)

81.20

96.90

92.21

3.09

81.50

96.50

91.68

3.73

RHmin (%)

54.80

84.10

73.11

5.72

53.90

84.40

71.76

7.04

SSD (\(\frac{{{\text{hr}}}}{{{\text{month}}}}\))

28.50

337.60

161.74

73.68

40.40

339.70

163.78

82.92

ET0 (\(\frac{{{\text{mm}}}}{{{\text{month}}}}\))

20.60

174.30

74.39

43.57

22.70

170.30

80.42

49.65

Ramsar

Tmin (°C)

0.90

24.90

13.77

6.82

2.90

25.40

14.34

6.85

Tmax (°C)

7.10

31.50

19.93

6.86

9.20

32.50

20.43

7.23

Tmean (°C)

4.00

28.20

16.86

6.82

6.10

28.90

17.39

7.03

RHmax (%)

80.60

97.30

89.85

3.33

80.30

95.10

90.18

3.80

RHmin (%)

56.50

84.20

69.07

4.83

56.70

82.70

69.61

5.82

SSD (\(\frac{{{\text{hr}}}}{{{\text{month}}}}\))

39.00

289.20

139.53**

51.16

52.80

309.70

140.29

58.79

ET0 (\(\frac{{{\text{mm}}}}{{{\text{month}}}}\))

20.90

158.50

71.52

37.90

23.20

151.70

72.77

42.10

Gharakhil

Tmin (°C)

-1.30

23.80

12.76

7.14

1.50

24.20

13.03

7.20

Tmax (°C)

8.10

34.80

21.98

7.14

11.70

34.70

22.58

7.35

Tmean (°C)

3.40

28.80

17.37

7.11

6.60

29.20

17.80

7.26

RHmax (%)

89.40

98.90

95.40

2.04

89.20

97.00

94.16

2.07

RHmin (%)

46.50

76.90

62.45

5.59

47.60

73.50

62.27

5.41

SSD (\(\frac{{{\text{hr}}}}{{{\text{month}}}}\))

40.30

310.20

170.11

49.43

73.30

317.60

169.54

53.09

ET0 (\(\frac{{{\text{mm}}}}{{{\text{month}}}}\))

23.40

164.40

78.10

40.16

20.20

169.70

80.22

44.70

Ahwaz

Tmin (°C)

6.20

31.50

19.44

7.86

7.40

31.40

19.79

8.02

Tmax (°C)

14.70

48.10

33.60

10.59

17.40

48.90

34.15

10.24

Tmean (°C)

10.40

39.80

26.52

9.20

13.40

39.90

26.98

9.10

RHmax (%)

28.10

95.80

60.09

19.00

27.80

96.30

62.35

18.27

RHmin (%)

6.80

67.10

23.85

14.67

7.80

64.70

25.46

13.46

SSD (\(\frac{{{\text{hr}}}}{{{\text{month}}}}\))

162.40

383.60

273.79

58.02

163.60

370.30

272.99

58.36

ET0 (\(\frac{{{\text{mm}}}}{{{\text{month}}}}\))

40.20

354.50

169.06

93.21

44.80

310.50

161.89

85.55

Shiraz

Tmin (°C)

-2.00

24.20

10.95

7.46

-1.10

22.30

10.46

7.29

Tmax (°C)

9.40

40.10

26.33

9.17

11.70

40.10

26.90

8.85

Tmean (°C)

4.80

32.10

18.64

8.26

5.60

31.10

18.68

8.04

RHmax (%)

30.00

91.90

58.33

17.96

27.80

90.90

58.51

18.24

RHmin (%)

6.60

54.50

20.86

11.01

4.30

49.50

17.51

10.04

SSD (\(\frac{{{\text{hr}}}}{{{\text{month}}}}\))

208.50

372.30

296.88

40.68

222.70

370.30

294.97

40.10

ET0 (\(\frac{{{\text{mm}}}}{{{\text{month}}}}\))

37.90

251.40

133.79

64.01

44.70

224.50

129.44

60.15

Yazd

Tmin (°C)

-4.40

28.30

13.24

8.74

1.10

27.40

14.32

8.46

Tmax (°C)

4.80

42.60

27.33

9.62

12.40

41.80

27.87

9.05

Tmean (°C)

0.20

35.50

20.29

9.16

6.80

34.60

21.10

8.74

RHmax (%)

15.50

87.70

41.06

19.22

12.60

80.40

38.11

17.38

RHmin (%)

5.10

57.60

16.25

9.96

4.90

39.60

14.49

7.54

SSD (\(\frac{{{\text{hr}}}}{{{\text{month}}}}\))

209.80

376.80

292.77

47.08

200.40

383.00

296.97

47.65

ET0 (\(\frac{{{\text{mm}}}}{{{\text{month}}}}\))

34.00

289.10

156.13

73.86

55.30

273.50

155.87

70.35

  1. *Min. = Minimum; Max. = Maximum; STD = Standard deviation.
  2. **The rows bolded in this comment, show the extreme values of the variable. For example, the minimum values of Tmin and RHmin, belong to the Shiraz and Yazd stations, respectively. Or the maximum values of Tmax and RHmax, belong to the Ahwaz and Gharakhil stations, respectively. For the variables SSD and ET0, both minimum (Ramsar) and maximum values (Shiraz and Ahwaz) are bolded.
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