Sentences with phrase «end of an ice age»

By this interpretation, it seems to me, nothing is more wrong than to treat the Human as though it has been biologically stationary since the ending of the Ice Age.

The end of an ice age is associated with about 10 - 20 F ° of temperature rise, according to interpretations of the Vostok ice cores.

The silica pulses corresponded exactly with the end of each ice age.

Today, we are in a warm period at the end of an ice age.

The real killer came at the end of the ice age 12,000 years ago.

It is generally accepted that different point types were developed in Africa and Eurasia and brought to Alaska before the end of the Ice Age.

Scientists used to think that dogs were domesticated toward the end of the Ice Age, about 14,000 years ago (SN Online: 7/22/10).

Meltzer is lead author on the study and an expert in the Clovis culture, the peoples who lived in North America at the end of the Ice Age.

As population densities of hunter - gatherers slowly rose at the end of the ice ages, bands had to choose between feeding more mouths by taking the first steps toward agriculture, or else finding ways to limit growth.

«The rise at the end of the Ice Age and today is about the same [a rise of 100 ppm] and we're going to be well above and beyond,» most likely increasing concentrations of greenhouse gases by hundreds of parts per million from preindustrial levels, Shakun notes.

«The end of an ice age, you have a sense in your bones what that means: a big, significant change for the planet,» Shakun says.

Skeletons from Greece and Turkey show that the average height of hunger - gatherers toward the end of the ice ages was a generous 5» 9» for men, 5» 5» for women.

«CO2 was the big driver of global warming at the end of the Ice Age.»

While the world's human population currently grows at an average rate of 1 percent per year, earlier research has shown that long - term growth of the prehistoric human population beginning at the end of the Ice Age was just 0.04 percent annually.

«What our analysis shows is that this era of global warming will be as big as the end of the Ice Age.

The study covers a period that begins at the end of the Ice Age and when there still was an ice sheet covering Canada, Shuman says.

«We have now added a view of the climate changes at the end of another ice age, for comparison, and we found that the patterns were different,» said co-author Professor Eelco Rohling, from the University of Southampton and ANU.

The ends of ice ages were different, but we can still use them to learn more about the sensitivity of the massive Antarctic ice sheet to climate change.»

At the end of an ice age continental ice sheets, oceans and atmosphere change rapidly.

When large parts of the ice sheet melted at the end of the ice age, the weight of the ice sheet decreased, and the crust began to rebound.

Despite the rising sea level and therefore increasing pressure, the simulation showed that towards the end of the ice age large amounts of gas hydrate became unstable and the released gas escaped through the sediment to the seawater.

The numerical simulations of the seafloor also showed that the pockmarks in Nyegga are likely associated with this phenomenon because they are located right in the area of the largest gas hydrate dissociation event at the end of the Ice Age.

The invention of fat - burning lamps toward the end of the Ice Age helped to transform European culture.

It makes me wonder if the rest of the changes we think we see are also caused by natural conditions much like what causes the end of an ice age and the warming that follows.

[7] It has been suggested that the end of this ice age was responsible for the subsequent Ediacaran and Cambrian Explosion, though this theory is recent and controversial.

Like the Milankovitch cycles, sunspot cycles» effects are too weak and too frequent to explain the start and end of ice ages but very probably help to explain temperature variations within them.

When sea levels rose at the end of the Ice Age, the once dry cave filled with sea water producing the hole that now measures 1000 feet across with a depth of over 460 feet.

Measuring some 300 meters across (985 feet), the Belize Blue Hole was created more than 10,000 years ago when rising waters at the end of the Ice Age submerged a vast series of caverns and caves.

The 74 Islands of the Whitsundays are the tops of all that remain of a coastal range, situated between Townsville and Mackay and some 900 km north of Brisbane, which was submerged when sea levels rose at the end of the ice age.

«I many times say to people, «I'm really lucky to be able to watch the end of the Ice Age,» because that's where we are,» he says.

This causes land uplift that has changed the sea bottom into dry soil since the end of the ice age.

It makes me wonder if the rest of the changes we think we see are also caused by natural conditions much like what causes the end of an ice age and the warming that follows.

By the way: the just mentioned 5 °C rise within ten thousand years at the end of the ice age are among the fastest global temperature rises documented in the Earth's history.

Yes, I suppose when you lose 3 km of ice (see above) at the end of an ice age (10,000 — 15,000 years ago) there will be some rebound.

Seriously hoping for a more mundane explanation for the ending of the ice age.

[Response: That is a positive feedback that acted during ice age cycles: when it got warmer at the end of an ice age, this led to release of stored CO2 from the deep ocean, thus raising atmospheric CO2 levels.

The rate of change is vastly faster than the rate of change at the end of the ice age.

Your incorrect claim that the current climate change «is unprecedented perhaps over the past 100,000 years» is incorrect, because it ignores that huge, incredibly rapid change at the end of the ice age, which was survived by all of the species that we know and love.

Marcott's data indicates that it took 4,000 years for the world to warm about 1.25 degrees from the end of the ice age to about 7,000 years ago.

The same mechanism explains why at the end of ice ages deep southern ocean heating / currents start 2000 years before any atmospheric CO2 rise.

A 1991 Shell video revealed last year by The Guardian warned of climate change «at a rate faster than at any time since the end of the ice age — change too fast perhaps for life to adapt, without severe dislocation.»

It was the end of the Ice Age that initiated dramatic coastal erosion and only a return to those frozen years will stop it.

CO2 did come from oceans as they heated up at end of ice age cycles with significant contributions from eurasian swamps as well.

They looked at data from wind - blown dust in sediment cores from the Red Sea, and matched these with records from Chinese stalagmites to confirm a picture of pronounced climate change at the end of each ice age, and calculated that sea levels rose at the rate of 5.5 metres per century.

At the end of the Ice Age, forests and sagebrush steppe gave way to desert shrubland, but the flow of energy — from sunlight to foliage to herbivore and carnivore — remained more or less constant.

At the end of the ice age the cold has harmed both the animal and plant masses and pushed them down to bare minunums.

I think you made a typo or error, pre industrial CO2 is generally considered 280ppm, 180ppm I think is the end of the ice age.

The crowded urban spaces of America and Europe spread across landscapes warmer than at any time since the end of the Ice Age.

Pulsing of seafloor volcanic activity may feed back into climate cycles, possibly contributing to glacial / inter-glacial cycles, the abrupt end of ice ages, and dominance of the 100 kyr cycle.

Also: the Agulhas current off the South African coast switched at the end of the ice age, perhaps playing a role as potent as the North Atlantic circulation, see summary in Zahn (2009).