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Bandpass filtering for qbo

Added by Zaman Fathullah over 8 years ago

Dear manager,

I would like to ask about using bandpass filter in cdo.
I want to bandpass filter of 9-48 months in monthly mean of 35 years data, but i don't know how to decide the fmin and fmax.
I have read all the forums about bandpass filtering but none of it talked about bandpass filter in monthly mean.
Please, tell me the right answer the fmin and the fmax of using bandpass filter in monthly mean data.

Thank you.

Zaman.