Sentences with phrase «obliquity for»

Now the glacial cold lurking in the deep ocean, held in check by obliquity for 10,000 years, has been set free, ending the Holocene Interglacial.

They are not based on evidence as glaciations have not failed to take place under falling obliquity for millions of years.

We used asteroseismology to measure a large obliquity for Kepler - 56, a red giant... ▽ More Stars hosting hot Jupiters are often observed to have high obliquities, whereas stars with multiple co-planar planets have been seen to have low obliquities.

We used asteroseismology to measure a large obliquity for Kepler - 56, a red giant star hosting two transiting co-planar planets.

Not exact matches

The acceleration caused by the jets is so small — about a millionth of a metre per second squared — that the star would have to move in the same direction for a million years to create obliquity.

Powering Triton's recent geological activity by obliquity tides: Implications for Pluto geology.

The alignment of obliquity and eccentricity due to precession is a much stronger effect than for the Earth, leading to «great» summers and winters on time scales of tens of thousands of years (the precessional period is 170,000 years).

For one, the seasons on the Earth, and the Earth's climate in general, depend upon its «obliquity,» or the 23.5 - degree tilt of the Earth's axis relative to its orbit.

Many scientists propose that decreasing obliquity, or Earth's tilt, is responsible for initiating the cooling tipping point.

As I re-read my answers, particularly the one about using the PF to address pelvic obliquity, likely many readers thought: I'll use my manual acumen to get it organized and then send them out to a women's health therapist for that pelvic floor stuff.

Stark and powerful for all their obliquity, they seem oddly confident in their reduction of the Abstract Expressionist gesture to nearly zero.

For one, the relative roles of eccentricity, obliquity, and precession in controlling glacial onsets / terminations are still debated.

The alignment of obliquity and eccentricity due to precession is a much stronger effect than for the Earth, leading to «great» summers and winters on time scales of tens of thousands of years (the precessional period is 170,000 years).

Smaller obliquity transfers annual average insolation from higher latitudes (would make polar regions darker) to lower latitudes and reduces the seasonal ranges (would make winters less dark for less long).

For the ice age — interglacial variations of the last few million years, a transition occured within the last million years where a 100,000 year timescale seemed to become dominant, whereas previously the variations followed the obliquity (~ 40,000 years) and precession cycles.

We can do this for obliquity and precession themselves, to gauge the changing strength of the driving influence, and to the LR04 stack to gauge the strength of the glacial response.

But a major problem exists for the standard orbital hypothesis of glaciation: Late Pliocene and early Pleistocene glacial cycles occur at intervals of 40 ky (8 — 11), matching the obliquity period, but have negligible 20 - ky variability.

That would account for the relative strengths of the obliquity and precessional signals in the data.

Here, for example, is normalized amplitude of the 41kyr obliquity changes compared to normalized amplitude of the 41kyr response in the LR04 stack (time goes from left to right, with the present at the far right):

MILANKOVITCH CYCLES overall favor N.H. cooling and an increase in snow cover over N.H high latitudes during the N.H summers due to the fact that perihelion occurs during the N.H. winter (highly favorable for increase summer snow cover), obliquity is 23.44 degrees which is at least neutral for an increase summer N.H. snow cover, while eccentricity of the earth's orbit is currently at 0.0167 which is still circular enough to favor reduced summertime solar insolation in the N.H. and thus promote more snow cover.

Individual discrepancies have been explained, for example, through interactions between other orbital frequencies such as obliquity and the 413,000 - year period of eccentricity but a unified explanation is lacking.

According to this theory, changes in the shape of Earth's orbit around the sun (eccentricity), variations in Earth's axial tilt (obliquity), and the tendency for Earth to «wobble» with respect to the direction of its rotational axis (precession) affect climate.

The use of the changing orbital eccentricity and obliquity of the ecliptic is nice, for completeness, but over only a century or two those slowly - altering values have little effect.

This recently posted figure from Javier seems to me to make it hard to avoid a central role for obliquity, with a 6500 year lag:

With the influence of increasing obliquity, the earth's pole in the sun for 6 months melts more ice.

The eccentricity, obliquity and precession variations in Milankovitch's model are said to have accounted for, respectively, 50 %, 25 % and 10 % of temperature change.

Flip the model upside down for the case where obliquity exceeds 55º and the annual - average insolation gradient is reversed

Something funny happens for planets at obliquity angles exceeding 55º.

For example, in the Upper Carboniferous (~ 300 million years ago), the ~ 41,000 yr obliquity cycle would have taken about 33,000 years (see e.g., here)