Author(s), and dataset

Average near-surface air temperature and standard deviation in ˚C

Polygons

NH

SH

Δ(NH-SH)

Earth

Dove [ 19 ], Do1852

14.9 ± 0.7

11.7 ± 1.1

3.2 ± 1.3

13.3 ± 0.6

Forbes [ 23 ], Fo1859

15.0± 0.7

11.7 ± 1.1

3.3± 1.3

13.3 ± 0.6

Ferrel [ 12 ], Fe1877

14.7 ± 0.7

15.3 ± 0.9

−0.6 ± 1.1

15.0 ± 0.6

Spitaler [ 10 ], Sp1885

“Complete dataset”

15.1 ± 0.5

14.6 ± 0.6

0.4± 0.7

14.8± 0.4

Batchelder [ 11 ], Ba1894

14.9 ± 0.7

13.0 ± 0.9

1.9 ± 1.2

13.9± 0.5

Arrhenius [ 26 ], A1896-1

15.1 ± 0.8

13.4 ± 0.8

1.8± 1.1

14.2 ± 0.6

Arrhenius [ 14 , 26 ]*, A1896-2

13.7± 0.8

12.7 ± 0.8

1.0 ± 1.1

13.2 ± 0.6

von Bezold [ 7 ], vB1901-1

“Spitaler”

15.3± 0.4

14.3 ± 0.5

1.0 ± 0.8

14.8 ± 0.3

von Bezold [ 7 ], vB1901-2

“Batchelder”

15.3± 0.4

14.4± 0.6

0.9± 0.8

14.8 ± 0.4

Hopfner [ 33 ], Ho1906-1

15.1 ± 0.7

13.0 ± 0.9

2.1 ± 1.2

14.0 ± 0.5

Hopfner [ 33 ], Ho1906-2

14.9 ± 0.7

13.7± 0.9

1.2 ± 1.1

14.3 ± 0.5

von Hann [ 32 ], vH1908

14.7 ± 0.7

13.5 ± 0.8

1.1± 1.1

14.1± 0.5

von Bezold [ 29 ], vB1906

Börnstein [ 35 ], Bö1913

“Complete dataset”

15.3 ± 0.4

13.6 ± 0.4

1.7± 0.6

14.5 ± 0.3

Defant and Obst [ 36 ], De1923

14.6 ± 0.7

13.1 ± 0.8

1.5 ± 1.1

13.9 ± 0.5

von Hann-Süring [ 38 ], vHS1939

15.0 ± 0.4

13.1 ± 0.5

1.9± 0.7

14.1 ± 0.3

Sellers [ 39 ], Se1965

12.5 ± 0.7

10.9± 0.7

1.5 ± 0.9

11.7 ± 0.5