Sentences with phrase «years after the last ice age»

Underwater landslides were more common in the first 5000 years after the last ice age than they are today.

But despite earlier pollen analysis that pegged the movement of some tree species (that is, average advancement via seed dispersal) at about a kilometer per year after the last ice age, genetic studies have reduced that estimate to a pace closer to a tenth of a kilometer per year, Loarie says.

Clovis culture was widespread for 400 years after the last Ice Age.

While the researchers, led by Shaun Marcott of Oregon State, conclude that the globe's current average temperature has not exceeded the warmth that persisted for thousands of years after the last ice age ended, they say it will do so in this century under almost every postulated scenario for greenhouse gas emissions.

Not exact matches

Hayhoe: To put it in perspective, after the last Ice Age there was about a thousand years for the world to warm.

«You see a rapid increase in population size from about 18,000 years ago, just as the climate began warming up after the last Ice Age,» says lead author Rebecca Dew.

The analysis is based on the fact that as the world warmed following the coldest part of the last ice age 20,000 years ago, the ice deep inside the Antarctic glaciers warmed more slowly than Earth's surface, just as a frozen turkey put into a hot oven will still be cold inside even after the surface has reached oven temperature.

Such work has shown that the southwestern United States became drier about 10,000 years ago, after the last ice age ended.

For example, our data provides evidence for today's European population being genetically descendant primarily from late mid-eastern migrations that took place after the last ice age, rather than from the first humans to arrive to the continent, more than 40,000 years ago.»

In the middle of Lake Huron, however, such lanes could have been buried when lake water levels rose rapidly about 7,500 years ago, after the end of the last ice age.

Only within the last 10,000 years, after the ice age ended and relatively moist conditions returned to the arctic, did nutritious forbs yield to less nourishing plants such as graminoids and woody shrubs.

So about 20,000 years ago, the last ice age reaches its peak, even those people, the moderns, can't survive and Britain has to be recolonized [all] over again after the peak of the last ice age, so it is an amazing story.

Earlier genome - based estimates have suggested that the ancestors of modern - day dogs diverged from wolves no more than 16,000 years ago, after the last Ice Age.

Last year I blogged about the surprising discovery that mosses released after 400 years of frozen glacial ensquashment had managed to survive and sprout new growth, a finding that radically altered our ideas about regrowth during the retreat of ice ages.

This impact helped form the cenotes, along with millions of years of erosion, plus rising water levels after the last ice age which causes the caves to flood.

The presently low maximum sea ice extent in the Western Nordic Seas is unique over the last 800 years, and results from a sea ice decline started in late - nineteenth century after the Little Ice Age.&raqice extent in the Western Nordic Seas is unique over the last 800 years, and results from a sea ice decline started in late - nineteenth century after the Little Ice Age.&raqice decline started in late - nineteenth century after the Little Ice Age.&raqIce Age.»

I recently read a book called «After the Ice» a book discussing human civilisation as the last ice age ended, around 20,000 years aIce» a book discussing human civilisation as the last ice age ended, around 20,000 years aice age ended, around 20,000 years ago.

Could you let us know what these much greater stimuli of the past (10,000 years, i.e. after the last ice - age) are?

-- Sea level has been rising at 1 mm to 3 mm every since the large continental glaciers melted after the last ice age — ie for the last 9,000 years.

At the beginning of the Holocene - after the end of the last Ice Age - global temperature increased, and subsequently it decreased again by 0.7 ° C over the past 5000 years.

By looking closely at this chart you can see that temperatures increased rapidly after the last ice age and then leveled off to a moderate increase before starting a downward trend about 6000 years ago.

Anyway, today we try to explain the exact opposite: how northern hemisphere ice ages can quite suddenly weaken — at least in case of the last one, which had its cold peak around 18,000 years ago, after which atmospheric CO2 levels «suddenly» (over a millennium or so) rose by 30 per cent, and temperatures started to climb closer * to our current Holocene values.

Global warming began its recovery after the last Snowball Earth, was halted a few times by the ice ages (big and little), and for the past 150 or so years has been slowly been returning to NORMAL.

New Scientist: About 12,000 years ago, as the world warmed after the last ice age, temperatures in the far north plummeted.

''... worked with two sediment cores they extracted from the seabed of the eastern Norwegian Sea, developing a 1000 - year proxy temperature record «based on measurements of δ18O in Neogloboquadrina pachyderma, a planktonic foraminifer that calcifies at relatively shallow depths within the Atlantic waters of the eastern Norwegian Sea during late summer,» which they compared with the temporal histories of various proxies of concomitant solar activity... This work revealed, as the seven scientists describe it, that «the lowest isotope values (highest temperatures) of the last millennium are seen ~ 1100 - 1300 A.D., during the Medieval Climate Anomaly, and again after ~ 1950 A.D.» In between these two warm intervals, of course, were the colder temperatures of the Little Ice Age, when oscillatory thermal minima occurred at the times of the Dalton, Maunder, Sporer and Wolf solar minima, such that the δ18O proxy record of near - surface water temperature was found to be «robustly and near - synchronously correlated with various proxies of solar variability spanning the last millennium,» with decade - to century - scale temperature variability of 1 to 2 °C magnitude.»

Add in the fact that the thickness of the ice, which is much harder to measure, is estimated to have fallen by half since 1979, when satellite records began, and there is probably less ice floating on the Arctic Ocean now than at any time since a particularly warm period 8,000 years ago, soon after the last ice age.

After the end of the last Ice Age came a warm spell, which ended a few thousand years ago as the global temperature dropped fairly steadily — until the 20th century.