Sentences with phrase «eccentricity forcing»

The reality there is that the ~ 100,000 year Milankovitch eccentricity forcing is so very minor — and the ~ 21,000, ~ 41,000 and ~ 413,000 periodicities don't change total global insolation.

However, Kubatzki (2005) found that a simultaneous changes in the perihelion and obliquity forcing is necessary to initiate a full glaciation, while obliquity forcing alone or in combination with eccentricity forcing is not able to cause a glaciation.»

Subsequently, these lake phases still occur at the peak eccentricity forcing but only at ∼ 1.8 Ma and ∼ 1.0 Ma.

Not exact matches

Not only does the axis precess (every 51,000 years), but the proximity of Jupiter offers a strong gravitational forcing function that modifies the eccentricity of its orbit and the obliquity (tilt) of the spin axis.

I am assuming the similarity of the «low eccentricity and consequently weak precessional forcing» in the current interglacial and during MIS 11.

Admittedly stunning visual style and left field music can't quite compensate for the willful eccentricity which often seems forced and unnecessary.

These forced eccentricities litter the film but are never part of a definitive tone.

Franco gives an impressive and accurate portrayal of Wiseau, but dismissing his eccentricities as punchlines, as well as forcing the story into a linear three - act structure, doesn't serve such a unique man or his movie well.

Re 37 Kevin McKinney — actually, orbitally - forced global annual average changes in TOA solar insolation are very small (in the case of Earth) and depend only on variations in eccentricity (setting aside the idea that there is a plane of dust and the plane of the orbit has a significant effect that way — heard the idea awhile ago, not sure there's much to support it?).

Vetoretti and Peltier (2004) found that glacial inceptions can be caused either by a strong obliquity forcing or by a combination of eccentricity - precession forcing and low CO2 values, which is in line with results from Berger and Loutre (2001) who found that CO2 is important during times like the MIS - 11, when the insolation variations are too small to drive glacial - interglacial cycles.

The present interglacial occurs during a period of low orbital eccentricity, and consequently the scale of the orbital forcing is lower now than during the last several interglacials.

Raypierre also mentions an interesting idea (p. 467 of his textbook) about variations in precession and eccentricity largely cancelling due to Kepler's law, leaving variations in obliquity (~ 40kyr) as the largest effective forcing, with some nonlinearity (CO2?)

Climate forcings due to its variations are tiny compared with those of the Milankovitch eccentricities, which are small compared with forcing due to manmade CO2.

And before I forget, the ice sheets were a consequence of external forcing of the system due to orbital eccentricities.

Earth eccentricity cycles modulate the amplitude of precessional forcing of the African monsoonal rains (see upper right panel), and deep lake conditions are observed in several East African basins during some (not all) eccentricity maxima over the 5 Ma (deMenocal, 2011; Trauth et al., 2005; Kingston et al., 2007)

This is why IPCC forecasts are wrong: They do not take changes in the Earth's orbit into account (only «eccentricity» (not the pendulum swing movements (see Wilipedia: Libration) The Libration forcing increased temps to their 2000 level and from this tipping point on, temps will stay flat for 3 more decades, which can easily and transparently for everyone interested be calculated.....

And Earth's core is hot, because of primordial heat from formation, radioactive decay of Earth core, Lunar tidal forces, AND the varying tidal force of the Sun which happens with Earth's periodic varying eccentricity.

Recent mid-ocean ridge eruptions occur primarily during neap tides and the first 6 months of the year, suggesting sensitivity to minor changes in tidal forcing and orbital eccentricity.

As planets act as anodes in a vaccum to the Sun's cathode, the electrical forces seeking equilibrium brought all the planets into their current orbits, but not without several thousand years of eccentricity.

In fact it simplifies analysis of Milankovich forcing to consider precession modulation and eccentricity as one and the same phenomenon.

Isotopius @ 105 I know Eric is going to address this, but Isotopius might like to consider Peter Huyber's latest paper, in the current edition of Nature, which effectively concedes that precession, tilt and eccentricity all play a role in the climate forcing of the last 1Ma.

He doesn't identify eccentricity as such in the title of the paper, but it is there in his orbital forcing model, as the amplitude modulation of precession, and needed for his model to work.

Simulation of non-linear accumulation and bioturbation effects on precession - forced basinal carbonate cycles demonstrate that variance can be transferred from the precession into the eccentricity band18, generating «redder», i.e., higher ρ1 values.