Sentences with phrase «ice age cycles where»

Furthermore, because the regression is being defined over ice age cycles where the biggest changes are related to the (now disappeared) North American and Fenno - Scandanavian ice sheets, the regression might well be much less for situations where only Greenland and West Antarctica are «in play».

Not exact matches

The dominant signal in the temperature record (the white line in the above figure) is a 100,000 year cycle where long ice ages are broken by short warm periods called interglacials.

Yet another theory has been advanced by Peter Huybers who argued that the 41,000 - year cycle has always been dominant, but that the Earth has entered a mode of climate behavior where only the second or third cycle triggers an ice age.

In geological time, the balance of the system has changed several times, and just like any system can have a resonance at certain points, the climate can reach a resonant point where it is teetering between two states (our current 100,000 year ice age warm period cycle).

As astronomical cycles they are predictable into the future and will cause another ice age probably in around 50,000 years (that depends on where the threshold for glaciation is, and what future CO2 levels will be at that time), but there is no way the Milankovich cycles could explain the current global warming.

(And the average age of all ice never got above single digits) Because most of the thickness increases come in the first couple of years, and most old ice is «old» because it is nearing the end of its natural cycle (where it thins to zero.)

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.

In geological time, the balance of the system has changed several times, and just like any system can have a resonance at certain points, the climate can reach a resonant point where it is teetering between two states (our current 100,000 year ice age warm period cycle).

The ice at the GISP2 site in central Greenland was only one ice age thick before they hit rock, (as opposed to Antarctica where the ice is more than 6 cycles 700,000 years thick) indicating that ALL the Central Greenland ice melted during the previous warming cycle (125,000 years ago).

Ice age timing has been set for the past million years or so by a 100,000 year cycle where the eccentricity of the earth's orbit changes.

Based on the cycle, it would suggest that we are heading into another Ice Age period of cooling where global temperatures will drop and ice will again form heavily at the polIce Age period of cooling where global temperatures will drop and ice will again form heavily at the police will again form heavily at the poles.

Where is the evidence of some other natural forcing, like the Milankovich cycles that controlled the ice ages (a fine historical example of a dramatic and regular climate cycle that can be read in the ice core records taken both in Greenland and in the Antarctic)?

Within this far more recent part of our planet's history the current disturbance of the radiative balance is unique at least over the last 20,000 years, stretching the entire Holocene up to the point where the Milankovitch cycles thought it fit to end the last ice age.

That includes the ice age cycles, where CO2 was not the initial cause, but a strong amplifying feedback.