Earth inclination vs climate transitions

[peterjfharris]

I have seen an unverified post which claims that changes in Earth orbit inclination (to the invariable plane) may alter the impact zone of Lunar tides and alter circulation of warmed MOC in the Polar sea. This orbit inclination cycles with a frequency of 100KY which matches and is in phase with Eccentricity and the ice age transitions.
Does anyone have more info or a link to show how these inclination changes could interact with climate?
Peter

 

[Filip Larsen]

Perhaps what you read relates to Milankovitch cycles [1].

[1] http://en.wikipedia.org/wiki/Milankovitch_cycles

 

[peterjfharris]

Thanks I am familiar with Milankovich cycles and also the paper by Muller. The Muller inclination cycles would be a better solution for climate transitions than Milankovich Eccentricity cycles if we could show that inclination (to the invariable plane) will modulate climate either by affecting insolation or by some other means . That is my question. I have seen a suggestion that this inclination cycle will redirect ocean tides affecting sea circulation around the Polar sea and could cause an ice age transition.
Is that true ?
Peter

 

[geophysics10]

I have seen a suggestion that this inclination cycle will redirect ocean tides affecting sea circulation around the Polar sea and could cause an ice age transition.
Is that true ?
Peter

Link to source?

100,000 year problem is still up in the air.
Here is a summary of what's being investigated...

http://en.wikipedia.org/wiki/100,000-year_problem#Solutions_to_the_problem

 

[Evo]

Let's remember that discussions of current CC or AGW is a closed topic.

 

[peterjfharris]

Evo
I am looking for an answer to my question which relates to orbital inclination possible effect on climate. Nix to CC or AGW.
Peter

 

[Evo]

Evo
I am looking for an answer to my question which relates to orbital inclination possible effect on climate. Nix to CC or AGW.
Peter

That's why I left your thread open and deleted 2 posts.

 

[Nik_2213]

Tidal effects.

As ocean currents and sea/air energy transfers vary with tides, whose ranges vary with polar inclination, precession, arcane changes in Moon's orbit etc etc, you may find the following work by Keeling & Whorf interesting.

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC18099/

quote:
Variations in solar irradiance are widely believed to explain climatic change on 20,000- to 100,000-year time-scales in accordance with the Milankovitch theory of the ice ages, but there is no conclusive evidence that variable irradiance can be the cause of abrupt fluctuations in climate on time-scales as short as 1,000 years. We propose that such abrupt millennial changes, seen in ice and sedimentary core records, were produced in part by well characterized, almost periodic variations in the strength of the global oceanic tide-raising forces caused by resonances in the periodic motions of the Earth and moon. A well defined 1,800-year tidal cycle is associated with gradually shifting lunar declination from one episode of maximum tidal forcing on the centennial time-scale to the next. An amplitude modulation of this cycle occurs with an average period of about 5,000 years, associated with gradually shifting separation-intervals between perihelion and syzygy at maxima of the 1,800-year cycle. We propose that strong tidal forcing causes cooling at the sea surface by increasing vertical mixing in the oceans. On the millennial time-scale, this tidal hypothesis is supported by findings, from sedimentary records of ice-rafting debris, that ocean waters cooled close to the times predicted for strong tidal forcing.
quote/

 

[peterjfharris]

Thanks Nik that was helpful. I had been researching Bond cycles and it links.