The daily variation in Earth’s geometric relationship with the sun correlates well with observed temperature trends and also gives some indication of weather extremes from-year-to-year. 

The coming changes in Earth’s climate due to precession of the orbit will be far beyond human experience in recorded history.  The NH will experience season-to-season difference of 50W/m2 at 60N with increased solar EMR during the NH Heating season and dramatically lower solar EMR during the NH Cooling season.  The season-to-season swing in the SH is even greater than the NH but to milder extremes than present as shown in Chart 11; less solar EMR during SH Heating but more during SH Cooling.