e/Anomaly time series

Information
has gloss	eng: An anomaly time series is the time series of deviations of a quantity from some mean. Either the mean is calculated for the entire time series, or only for parts of it, for example for each hour of the day if the daily cycle of some variable is to be subtracted. Instead of the arithmetic mean, other indicators of locality may also be used, such as the numerically more robust median.
lexicalization	eng: anomaly time series
instance of	c/Climate and weather statistics