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Table 4

Results of detrending tests.

Detrending with Period Peak height

No detrending 127.8 ± 0.9 38.5
Polynomial fit of first order 121.8 ± 0.7 43.1
Polynomial fit of second order 122.0 ± 0.7 43.5
Polynomial fit of third order 122.0 ± 0.7 43.5

Detrending with the seasonal mean 121.8 ± 0.7 43.6

Polynomial fit of first order (slope +1σ) 122.4 ± 0.7 42.2
Polynomial fit of first order (slope –1σ) 121.3 ± 0.7 43.9

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