Ice-age cycles: earth's rotation insta- bilities and sea-level changes, Geophys. Res. Lett., 24, 3041-3044.Sabadini R, Vermeersen LLA. 1997. Ice-age cycles: Earth's rotation instabilities and sea-level changes. Geophysical Research Letters 24: 3041-3044....
An Ice Age is a period of time, typically about 30) at different points on the Earth's surface, etc million but occasionally as long as 300 million The short-term (40.000/100.000 years) cycles are A. By listing examples years. during which ice sheets cover at least the known to be ca...
There is some evidence that the icecame and went in regular cycles, driven by changes in Earth’s orbit. If true, this would mean that the Karoo ice age operated in much the same way as the current one. Antarctica freezes over 14 million years ago Antarctica wasn’t always a frozen was...
Mischna, M. et al. On the orbital forcing of Martian water and CO2 cycles: A general circulation model study with simplified volatile schemes.J. Geophys. Res.108, doi:10.1029/2003JE002051 (2003) Richardson, M. I. et al. Obliquity, ice sheets, and layered sediments on Mars: What spacec...
There exist close connections between changes in the position of the earth's rotation axis with respect to the earth's surface (polar wander), variations in sea level, the rise and decline of Ice Ages and global change on geological time scales. The modeling of these interrelationships has rec...
If an orbitally-tuned age-model is instead applied, these interactions are suppressed, with the system appearing more nearly linear. A generalized phase synchronization analysis is used to further assess the nonlinear coupling between obliquity and the glacial cycles. Using a formal hypothesis testing ...
but that the Earth has entered a mode of climate behavior where only the 2nd or 3rd cycle triggers an ice age. This would imply that the 100,000-year periodicity is really an illusion created by averaging together cycles lasting 80 and 120 thousand years. This theory is consistent with the...
A northern lead in the orbital band: north–south phasing of Ice-Age events. Re-analysis of existing data sets shows that they are fully consistent with northern-insolation control of Ice-Age cycles, and do not provide strong suppor... Alley,B Richard,Brook,... - 《Quaternary Science Revie...
Much the same ice-age simulations and agreement with the delta/sup 18/O records as with the original model are still obtained. The observed phase-correlation between the 100,000-yr cycles and eccentricity is examined. First, the model is shown to give a approx. 100,000-yr response to ...
Cycles may have additional influences on ocean circulation and atmospheric CO2concentration, which amplify the effects of the changes in insolation, a process known as a positive feedback (Figures 2b & c) (Imbrieet al.1993). Thus the Earth's climate system tends to force a persistent glacial ...