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 | - |