| What Does Each Harmonic Mean? |
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| As an example, if the time series is the monthly-mean temperature
from |
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| January to December: |
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| q | N=12, Dt =1 month, and T=12´
Dt = 12 month = one year |
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| q | 1s harmonic (k=1)
è annual harmonic (one cycle
through the period) |
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| q | 2nd harmonic
(k=2) è semi-annual harmonic (2 cycles
through the period) |
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| q | Last harmonic (k=N/2) è the smallest period to be included. |
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| Period
= 2Dt = 2 months |