Table 3 Impact of the reservoirs on temperature variables.

From: Climate change and tree growth in the Khakass-Minusinsk Depression (South Siberia) impacted by large water reservoirs

Temperature threshold, Tthr

Krasnoyarsk reservoir

Sayano-Shushenskoe reservoir

Near: MIN

Far: TASH

Near: CHER

Far: TASH

1936–1967

1968–2014

∆

1936–1967

1968–2014

∆

1951–1979

1980–2014

∆

1951–1979

1980–2014

∆

Date of stable temperature crossing Tthr in spring (days)

0 °C

5 Apr ± 9

30 Mar ± 9

− 6*

8 Apr ± 9

3 Apr ± 9

− 5*

1 Apr ± 9

25 Mar ± 11

− 7*

7 Apr ± 8

2 Apr ± 9

− 5*

5 °C

16 Apr ± 10

10 Apr ± 9

− 6*

17 Apr ± 8

14 Apr ± 10

− 3

11 Apr ± 8 /)

6 Apr ± 10

− 5*

17 Apr ± 8

13 Apr ± 10

− 4

10 °C

3 May ± 8

3 May ± 11

0

10 May ± 9

10 May ± 11

0

8 May ± 11

5 May ± 12

− 3

11 May ± 9

9 May ± 11

− 2

Date of stable temperature crossing Tthr in autumn (days)

0 °C

25 Oct ± 8

26 Oct ± 8

 + 1

22 Oct ± 8

24 Oct ± 9

 + 2

28 Oct ± 7

6 Nov ± 10

 + 9*

21 Oct ± 9

26 Oct ± 9

 + 5*

5 °C

11 Oct ± 9

9 Oct ± 10

− 2

6 Oct ± 9

6 Oct ± 8

0

16 Oct ± 9

21 Oct ± 9

 + 5*

7 Oct ± 8

7 Oct ± 9

0

10 °C

6 Sep ± 9

9 Sep ± 8

 + 3

31 Aug ± 9

1 Sep ± 7

 + 1

9 Sep ± 9

12 Sep ± 8

 + 3*

1 Sep ± 8

3 Sep ± 6

 + 2

Duration of season with temperature above Tthr (days)

0 °C

202 ± 10

210 ± 11

 + 8*

197 ± 10

204 ± 13

 + 7

211 ± 10

226 ± 15

 + 15*

197 ± 11

207 ± 12

 + 10*

5 °C

178 ± 14

182 ± 14

 + 4

172 ± 11

176 ± 13

 + 4

188 ± 12

198 ± 15

 + 10*

173 ± 10

177 ± 14

 + 4

10 °C

113 ± 12

116 ± 14

 + 3

102 ± 15

104 ± 12

 + 2

115 ± 10

119 ± 15

 + 4*

103 ± 13

106 ± 12

 + 3

Sum of active temperatures above Tthr (°C·days)

0 °C

2525 ± 144

2586 ± 135

 + 61

2213 ± 123

2287 ± 133

 + 74*

2473 ± 104

2644 ± 138

 + 172*

2205 ± 116

2321 ± 127

 + 116*

5 °C

1603 ± 132

1631 ± 109

 + 28

1317 ± 112

1367 ± 106

 + 50*

1521 ± 97

1601 ± 114

 + 80*

1318 ± 101

1389 ± 106

 + 71*

10 °C

875 ± 106

886 ± 93

 + 11

636 ± 84

666 ± 80

 + 30

2473 ± 104

2644 ± 138

 + 172*

2205 ± 116

2321 ± 127

 + 116*

  1. For each reservoir and station (Minusinsk—MIN, Cheryomushki—CHER, Tashtyp—TAH), the first two columns show mean ± standard deviation over sub-periods before to after launching of the turbines; the third column (Δ) shows difference in means between sub-periods, significant (p < 0.05) differences are written in bold.
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