Filtering annual cycle from time series

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Fehmi Dilmahamod
Fehmi Dilmahamod on 14 Aug 2014
Answered: Star Strider on 14 Aug 2014
Hi,
I have a sea surface temperature time series over 5 years. When performing a Morlet wavelet analysis, a very significant annual signal is observed.
I actually need to filter out the annual signal to observe any inter-annual or intra-annual signal.
Any idea/suggestion how to perform the filtering out?
size sst: 1 * 60
Thanks in advance.

Answers (1)

Star Strider
Star Strider on 14 Aug 2014
Without knowing more about your data, I would use a conventional notch or bandstop filter, as calculated with the Signal Processing Toolbox. (I deal mostly with biomedical signals, and the convention is to preprocess them with conventional digital notch filters rather than using wavelet filters to remove unwanted frequencies.)

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