1978-1994

1998-2014

Initial TCO

1978-1979

Annual variation

Mean TCO

Annual variation

(DU)

σ

(DU/y)

S.E.

(DU)

σ

(DU/y)

S.E.

Global

312.88

10.28

−1.3455

0.0357

292.80

13.64

−0.1558

0.0443

Northern Hemisphere

320.18

32.79

−1.2958

0.0837

308.38

26.99

−0.094

0.0878

Southern Hemisphere

303.35

17.41

−1.3575

0.0367

275.73

10.11

−0.0138

0.032