Latitude

in ˚

Author and data set (temperatures in ˚C)

Dove

Do1852

Forbes

Fo1859

Ferrel

Fe1877

Spitaler

Sp1885

Batchelder

Ba1894

Arrhenius

A1896-1

Arrhenius*

A1896-2

Hopfner

Ho1906-1

Hopfner

Ho1906-2

Defant and Obst

De1923

Von Hann-Süring

vHS1939

Sellers

Se1965

90 N

−16.5

−16.5

-

−20

-

-

-

-

-

−22.7

−22.7

-

85

-

-

-

-

-

-

-

-

-

-

−21.2

−23.5

80

−14

−14

−15.3

−16.5

−16.9

-

-

−16.1

−16.4

−17.1

−17.2

-

75

-

-

-

−13.3

-

-

-

-

-

-

−14.7

−15.8

70

−8.9

−8.7

−9.8

−9.9

−10.1

-

-

−10.1

−9.6

−10.7

−10.7

-

65

-

-

-

−4.3

-

−5.5

−7

-

-

-

−5.8

−7.1

60

−1

−1.2

−1.5

−0.8

−1.3

-

-

−1.1

−0.8

−1.1

−1.1

-

55

-

-

-

2.3

-

2.5

1.2

-

-

-

2.3

0.6

50

5.4

5.8

6.3

5.6

5.8

-

-

5.8

6.2

5.8

5.8

-

45

-

-

-

9.6

-

10.3

8.7

-

-

-

9.8

7.6

40

13.6

13.6

13.6

14

14

-

-

14.6

14.5

14.1

14.1

-

35

-

-

-

17.1

-

17.5

15.3

-

-

-

17.2

14.1

30

21

21

19.8

20.3

20.2

-

-

20.8

20.7

20.4

20.4

-

25

-

-

-

23.7

-

23.1

21.9

-

-

-

23.6

20.5

20

25.2

25.3

25.3

25.6

24.9

-

-

25.3

25.2

25.3

25.3

-

15

-

-

-

26.3

-

26.2

25.4

-

-

-

26.3

25.2

10

26.6

26.6

27.2

26.4

27.1

-

-

26.7

26.8

26.8

26.7

-

5

-

-

-

26.1

-

26.7

25.5

-

-

-

26.4

25.6

0

26.5

26.5

26.7

25.9

26.6

-

-

26.4

26.3

26.3

26.2

-