Sentences with phrase «past ice ages»

This line marks a deep ocean channel that remained water - filled even during past ice ages, when sea levels saw channels between other islands in the region dry out.

The different patterns can be used to hunt for now - disappeared glaciers from past ice ages.

The resulting lower atmospheric CO2, the argument goes, would mean lower temperatures, suggesting that the mechanism was at least partially responsible for triggering past ice ages.

Many past ice ages were caused by... 1.

Antarctic ice cores show that CO2 and temperature went up and down together through past ice ages, pointing to powerful biological and geochemical feedbacks.

And did airborne iron cause past ice ages?

This may have been possible because the significantly lower sea level during past ice ages resulted in a land bridge between Asia and North America, the Beringia land bridge.

Then, in the late 1800s, the Swedish chemist Svante Arrhenius first calculated the greenhouse effect of CO ₂ in our atmosphere and linked it to past ice ages on our planet.

The discovery supports the hypothesis that huge releases of ocean methane contributed to the rapid warmings of the Earth that have ended past ice ages.»

The paleoclimate record combined with global models shows past ice ages as well as periods even warmer than today.

Many European species retreated to the Mediterranean during past ice ages, meaning that their southerly populations are especially ancient and diverse.

Scientists often look into Earth's past to better predict its future, and some clues about iron fertilization come from past ice ages.

Visible from space, the hole is a relic of past ice ages and was made famous by the oceanographer Jacques - Yves Cousteau.

Antarctic ice cores show that CO2 and temperature went up and down together through past ice ages, pointing to powerful feedbacks.

History: In 1896 Svante Arrhenius (1903 Nobel Prize in Chemistry) predicted the decrease in CO2 needed to cause past ice ages.

Costa and her colleagues wanted to find out if the dusty atmosphere also stimulated CO2 sequestration in other ocean basins during the past ice age.

As Weir points out, it likely owes its survival as a species on being geographically isolated from its parental species at some point during a past ice age when rainforest coverage contracted, and wide rivers formed natural barriers.

Like other sea - holes or «vertical caves,» the Great Blue Hole in Belize's Lighthouse Reef actually formed on dry land, during a past ice age when the sea level was a lot lower than it is today.

However, our fortune would last much longer than that: the Milankovitch cycles can be calculated over millions of years with astronomical precision (and incidentally be used to predict the beginning of all the past ice ages), and according to that, the next major climate change would arrive only in about 50,000 years.

Seafloor sediments show that during past ice ages, more iron - rich dust blew from chilly, barren landmasses into the oceans, apparently producing more algae in these areas and, presumably, a natural cooling effect.

Besides looking back to past ice ages, Kukla also extrapolated the orbital cycles into the future to forecast continued cooling and a descent into another ice age.

CO2 didn't initiate warming from past ice ages but it did amplify the warming.

«Evidence that massive quantities of methane gas have been released from the sea floor during past ice ages has been reported.

As massive ice sheets retreated during past ice ages, their weight on the land below lifted and the land rebounded.

Past ice ages have been naturally set off by a numerous factors, most importantly, changes in the Earth's orbit around the sun (Milankovitch cycles) and shifting tectonic plate movements that affect wind and ocean currents.