Modification basis for the seasons

The extreme axial orientation of Uranus can ease the difficulty in
spotting the same orbital dynamic for the Earth in modifying the
reason for the seasons

http://www.berkeley.edu/news/media/r...anus_5year.jpg

Even with familiarity,the practice of extracting axial orientation and
determining the shift in orbital orientation can be problematic but
the change will occur in accordance at a rate determined by Keplerian
orbital geometry and speed -

http://www.metoffice.gov.uk/corporat...0060317b_b.jpg

The length of daylight/darkness remains the same at the Equator
throughout an annual orbit hence it is easy enough see see how the
solar radiation/orbital shadow line pivots off the Equator and causes
extreme variations of daylight/darkness asymmetry at the poles.

The longitudinal alteration in the solar radiation/orbital shadow
boundary determines the Total length of the daily cycle and this is
truly a phenomena that is experienced globally,at the Equator and
higher and lower latitudes simultaneously.The slow change in the
orbital orientation of the Earth throughout an annual cycle is not an
even change but changes in accordance with Keplerian geometry -

http://www.mhhe.com/physsci/astronom...ages/04f15.jpg

The Equation of time represents the rate of change of orbital
orientation against a constant axial cycle.The thing is that axial
rotation has never been isolated from orbital motion for reasons that
unfortunately remain from Flamsteed's efforts and especially the
analemma hoax which introduces a variable axial tilt component into
the Equation of Time.

The modification of the explanation for the seasons emerges from the
original Copernican attempt to explain the seasons using the motions
of the Earth,in some respects,Copernicus is the first
climatologist,his explanation is seen in Chpt 11 -

http://webexhibits.org/calendars/yea...opernicus.html

Contemporary concerns such as global warming or even to set the
background for global climate require a modification of the reasons
for the seasons based on variable inclination by inserting an
additional motion attached to the orbital motion of the Earth,observed
as a longitudinal/latitudinal change in the SR/OS boundary denoting a
slow orbital orientation change in the Earth to the central Sun.

The modification cannot proceed without isolating axial rotation hence
the dilemma faced by those accustomed to referencing axial rotation
directly to zodiacal geometry.It is not every day that astronomers
have a chance to work with a new motion or rather the one they have
yet to discover once you extract axial rotation but it will be worth
it.