Secular Variation
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SCIENCE
Time Series Analysis
Secular Variation
Secular trends reveal hidden long-term shifts beyond regular cycles in natural phenomena
4 Feb 2026
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Why is the classification of a variation as secular dependent on the timescale considered?
Because secular variations always occur at the same rate regardless of timescale.
Because secular variations are only observed in human-made data, not natural phenomena.
Because a variation that appears secular over a short timescale may be part of a longer periodic cycle over an extended timescale.
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