It has been estimated that the mean anomaly in the Northern hemisphere at the monthly scale only has around 60 degrees of freedom — that is, 60 well - place stations would be sufficient to give a reasonable estimate of the large scale month to month changes. (realclimate.org)
It has been estimated that the mean anomaly in the Northern hemisphere at the monthly scale only has around 60 degrees of freedom — that is, 60 well - place stations would be sufficient to give a reasonable estimate of the large scale month to month changes. (realclimate.org)
The NCDC nClimDiv PDSI calculation is reported at the monthly scale, based on monthly temperature and precipitation (49). (pnas.org)