I propose
that it is the lunar tidal modulation of the seasonal variations in the solar
flux, coupled with the hemispherical asymmetry of the Earth’s surface
properties (i.e. Nth Hemisphere – dominated by continents, St Hemisphere –
dominated by oceans) that is responsible for setting the world's mean
temperature.
On
inter-annual time scales:
There are
periodic slow downs in the Earth’s rotation rate every 13.66 days. These slows
downs are caused by the passage of the lunar tidal bulge across the Earth’s
equator once every half lunar tropical month = 13. 66 days. The ratio in the
magnitude of the increase in Length Of Day (LOD) at one crossing with respect
to the magnitude of the increase in LOD at the next is primarily governed by
the orientation of the lunar line-of-apse with respect to the seasonal cycle as
marked by the solstices and equinoxes (there is also a secondary effect caused
by the 5 degree tilt of lunar obit with respect to the ecliptic). Please see:
On
decadal time scales:
The
climate variation is driven by the ratio in strength and frequency of El Nino
to La Nina events – This is dominated by the 31/62 year lunar tidal cycle. For
31 years, El Ninos start in years when lunar line-of-apse is pointed at the Sun
near the Winter/Summer solstices, then for next 31 years, El Ninos start in
years when lunar line-of-apse is pointed at the Sun near the Vernal/Autumnal
equinoxes.
On
centennial to millennial time scales:
The
climate variation appear to be correlated with variations in the overall
strength of the Sun’s magnetic field as indicated by Be10 and C14
proxies. These primarily occur at 88.5 years (Gleissberg
cycle), 208 years (de Vries Cycle), 354 years, 510 years, 708 years, 980 years
(Eddy Cycle) and 2300 years (Hallstatt Cycle). It just so happens that these cycles
in the Sun’s magnetic field strength are matched by the times at which the
lunar line-of-apse points at the Sun at either the solstices or equinoxes of
the Earth’s seasonal calendar (in a reference frame that is fixed with respect
to the Earth’s orbit).
This
produces a long term 21,000 year climate forcing which when coupled with the
Milankovitch orbital forcing and the formation and melting of ice sheets at
the Earth’s poles, produces the ice-age cycles.
No comments:
Post a Comment