Geoscience Reference
In-Depth Information
a
b
c
Fig. 5.3 a
Synthetic signal with the periodicities ˄
1
=50, ˄
2
=15 and ˄
3
=5, with dif erent
amplitudes, and
b
the same signal overprinted with Gaussian noise.
c
h e time series shows
a signii cant linear trend.
