Sentences with phrase «as orbital variations»

We know there are many factors that can affect our climate, such as orbital variations, shifts in geographical features, volcanos, GHGs, etc..

If something triggers a cool spell, such as an orbital variation reducing incident sunlight, then water freezes at the poles, which increases the Earth's albedo, while the cooler oceans absorb more CO2, reducing the greenhouse effect.

No change in the external driver is required, however a slight periodicity in the driver such as orbital variation could tend to synchronize the oscillation.

Not exact matches

This was particularly true at more distant dates as the Indian monsoons were stronger, thanks to more sunlight hitting Earth due to orbital variations.

Periods of volcanism can cool the climate (as with the 1991 Pinatubo eruption), methane emissions from increased biological activity can warm the climate, and slight changes in solar output and orbital variations can all have climate effects which are much shorter in duration than the ice age cycles, ranging from less than a decade to a thousand years in duration (the Younger Dryas).

The consensus is that several factors are important: atmospheric composition (the concentrations of carbon dioxide, methane); changes in the Earth's orbit around the Sun known as Milankovitch cycles (and possibly the Sun's orbit around the galaxy); the motion of tectonic plates resulting in changes in the relative location and amount of continental and oceanic crust on the Earth's surface, which could affect wind and ocean currents; variations in solar output; the orbital dynamics of the Earth - Moon system; and the impact of relatively large meteorites, and volcanism including eruptions of supervolcanoes.

They proposed that these variations in orbital inclination lead to variations in insolation, as the earth moves in and out of known dust bands in the solar system.

He then uses what information is available to quantify (in Watts per square meter) what radiative terms drive that temperature change (for the LGM this is primarily increased surface albedo from more ice / snow cover, and also changes in greenhouse gases... the former is treated as a forcing, not a feedback; also, the orbital variations which technically drive the process are rather small in the global mean).

In the case of Edasich, however, the high orbital eccentricity of its companion made its motion distinguishable from stellar pulsation as the cause of the observed velocity variations.

First of all, simplify by imagining a box with orbital forcing as input and an (unobserable) temperature as output; the water vapor feed back is inside and is effectively instaneous on the scale of millennia appropriate for considerring ice age variations.

The fundamental driver has long been thought, and continues to be thought, to be the distribution of sunshine over the Earth's surface as it is modified by orbital variations.

As suggested previously, however, the variation of stellar radiation over time and planetary orbital distance are as critical to the development of Earth - type planets as their masAs suggested previously, however, the variation of stellar radiation over time and planetary orbital distance are as critical to the development of Earth - type planets as their masas critical to the development of Earth - type planets as their masas their mass.

These are well described cycles, which have become known as Milankovitch cycles, after the name of the Russian scientist who for the first time in the 1920s was able to correlate these orbital and rotational variations (which other scientists had known about for many years) with the dates of various ice ages which had been more recently determined.

The orbital variations are astronomically parameterized as part of insolation, which is again the main boundary condition imposed on the system.

The fundamental driver has long been thought, and continues to be thought, to be the distribution of sunshine over the Earth's surface as it is modified by orbital variations.

The greenhouse gases are best regarded as a biogeochemical feedback, initiated by the orbital variations, but then feeding back to amplify the warming once it is already underway.

We note that there are many reasons why the climate changes — the sun, clouds, oceans, the orbital variations of the earth, as well as a myriad of other inputs.

You must have failed to notice Coby that in those articles I link to (* & 312) I do mention that ONE «oscillator» is a TRIVARIATE of planetary orbital variation, planetary axial precession and Solar Climate as concerned with TOTAL, and Spectral division of, Solar energy output.

This positive feedback is necessary to trigger the shifts between glacials and interglacials as the effect of orbital changes is too weak to cause such variation.

Though there are other explanations such as solar and orbital variations, their underlying theories are not as developed as AGM.

Regular variation in the Earth's orbital parameters has been identified as the pacemaker of climate change on the glacial to interglacial time scale (see Berger, 1988 for a review).

If its orbital variation, as you say, or variable solar activity, it looks like these changes will occur (as they have over the last 500 million years) whether we like it or not.

Another factor could be the variations of the earth's orbital shape cause it to vacuum clean a different part of the near earth space, picking up more dust and meteorites as the orbit moves into new regions.

We know that the cause isn't orbital variations known as Milankovic cycles, because we can plot our position in the various cycles and we're presently on the cold side of a cycle, not the hot side.