Sentences with phrase «previous ice ages»

So ask yourself the question: where does all the carbon dioxide come from in previous ice ages?

Based just on orbital forcing, and following previous ice age cycles, we are due for a long period of gradual cooling to the next ice age.

Also unclear is why these abrupt climate shifts, also seen in previous ice ages, haven't happened in the past 10,000 years.

Earth is currently in an interglacial period, and based on previous ice ages and the changes in global temperatures during this interglacial period, we are now near the end of it.

«where does all the carbon dioxide come from in previous ice ages?

Core samples from deeper in the Lake Towuti sediment will show whether this drying evident during the last ice age also happened in previous ice ages.

New research by Professor Beth Shapiro of the UC Santa Cruz Genomics Institute and University of Alberta Professor Duane Froese has identified North America's oldest bison fossils and helped construct a bison genealogy establishing that a common maternal ancestor arrived between 130,000 and 195,000 years ago, during a previous ice age.

We will swim up through the cavern to the upper most lip and then circumnavigate the entire blue hole, seeing ancient river beds and waterfalls that were created during a previous ice age.

This question presumes that the inputs for such a reconstruction are obtainable; it also presumes that particular aspects of the previous ice age (s) are relevant to global warming scenarios.

We know there have been previous ice ages and subsequent warming cycles; we know when they were, and how much time elapsed between them.

If there was any truth to the claim that CO2 is heating the Earth, one would have to ignore all of its previous ice ages that were followed by natural warming periods, including the most recent mini-ice age from about 1300 to 1850.

«Such an enormous increase would be comparable to the temperature change from the previous ice age to the present,» says one of the researchers, Meinrat Andreae of the Max Planck Institute for Chemistry in Mainz, Germany.

In a previous Ice Age an ice wall across the Strait dammed the Mediterranean.

The good and more stable weather and much higher CO2 levels relative to the previous Ice Age made possible by the Holocene appears to be what enabled the development of human civilization by enabling the cultivation of crops rather than hunting and gathering.