Sentences with phrase «south of the ice sheets»

Before the corridor closed, prior to the last glacial maximum, they moved freely up and down between the ice - free regions in the north and grasslands south of the ice sheets.

Their findings, published June 6 in Proceedings of the National Academy of Sciences, indicate that the corridor could not account for the initial dispersal of humans south of the ice sheets, but could have been used for later movements of people and animals, both northward and southward.

Previous work by coauthor Beth Shapiro, professor of ecology and evolutionary biology at UC Santa Cruz, had shown that the bison populations north and south of the ice sheets were genetically distinct by the time the corridor opened.

By the time bison were able to pass through the corridor, he says, humans were already living south of the ice sheets, presumably after traveling down the Pacific coast by boat.

The latter group then could have moved south of the ice sheets at a later date.

Not exact matches

From an appendectomy on the Antarctic ice sheet to the comparative luxury of the new South Pole station, scientist Vladimir Papitashvili talks about his life's work at the poles

The only current ice sheets are Antarctic and Greenland; during the last ice age at Last Glacial Maximum (LGM) the Laurentide ice sheet covered much of Canada and North America, the Weichselian ice sheet covered northern Europe and the Patagonian Ice Sheet covered southern South Ameriice sheets are Antarctic and Greenland; during the last ice age at Last Glacial Maximum (LGM) the Laurentide ice sheet covered much of Canada and North America, the Weichselian ice sheet covered northern Europe and the Patagonian Ice Sheet covered southern South Ameriice age at Last Glacial Maximum (LGM) the Laurentide ice sheet covered much of Canada and North America, the Weichselian ice sheet covered northern Europe and the Patagonian Ice Sheet covered southern South Ameriice sheet covered much of Canada and North America, the Weichselian ice sheet covered northern Europe and the Patagonian Ice Sheet covered southern South Amesheet covered much of Canada and North America, the Weichselian ice sheet covered northern Europe and the Patagonian Ice Sheet covered southern South Ameriice sheet covered northern Europe and the Patagonian Ice Sheet covered southern South Amesheet covered northern Europe and the Patagonian Ice Sheet covered southern South AmeriIce Sheet covered southern South AmeSheet covered southern South America.

The Arctic took another 3,000 - 4,000 years to warm this much, primarily because of the fact that the Northern Hemisphere had huge ice sheets to buffer warming, and the fact that changes in ocean currents and Earth's orbital configuration accelerated warming in the south.

Capt. Roald Amundsen, the discoverer of the Northwest Passage, left Norway in June, 1910, in the «Fram,» seemingly with the intention of sailing around Cape Horn, however, he sailed to the westward across the South Pacific, and made a landing at whale Bay on the ice sheet covering Ross Sea.

the south - bound expedition had cleared that vast plain of floating ice which flows down from the great mountains of the interior and covers the southern part of Ross Sea throughout an area above 20,000 square miles with an ice sheet approximately 800 feet in thickness, and had begun to climb the heights which form the mountainous embayment at the head of Ross Sea.

But the thing is, [the ice sheet] kind of stops right there at the edge [of South America], especially down around Cape Horn and those islands down there — those were not glaciated at last glacier maximum.

«Melting Greenland ice sheet may affect global ocean circulation, future climate: University of South Florida and international scientists find influx of freshwater could disrupt the Atlantic Meridional Overturning Circulation, an important component of global ocean circulation.»

The argument is that the increased separation of the Antarctic land mass from South America led to the creation of the powerful Antarctic Circumpolar Current which acted as a kind of water barrier and effectively blocked the warmer, less salty waters from the North Atlantic and Central Pacific from moving southwards towards the Antarctic land mass leading to the isolation of the Antarctic land mass and lowered temperatures which allowed the ice sheets to form.

The research team found the evidence confirming the stability of the East Antarctic ice sheet at an altitude of 6,200 feet, about 400 miles from the South Pole at the edge of what's called the polar plateau, a flat, high surface of the ice sheet covering much of East Antarctica.

«We had little information in the south, but we had three or four more cores in the northern part of the ice sheet.

In the same issue of the journal Science, other scientists reported on research from the opposite end of the world, observing that water around the south pole has become less salty, owing to the melting of the West Antarctic ice sheet.

• One is that the cold air above the Laurentide Ice Sheet created a tremendous high pressure system that shifted the polar jet stream to the south, pushing the track followed by winter storms down into the Southwest, which had the effect of dramatically reducing the amount of rainfall in the Northwest while increasing it in the Southwest.

By the time the ice sheets receded thousands of years later, «bison in the south all look the same, and bison in the north look different,» says Beth Shapiro, an evolutionary biologist at the University of California, Santa Cruz.

«Our findings suggest a significant link between ice sheet growth, the monsoon and the closing of the Panama Seaway, as North and South America drifted closer together.

The study, co-authored by Dr Thomas Stevens, from the Department of Geography at Royal Holloway, University of London, found a previously unknown mechanism by which the joining of North and South America changed the salinity of the Pacific Ocean and caused major ice sheet growth across the Northern Hemisphere.

By comparison, the Antarctic ice sheet on Earth weighs about 4 × 1018 kg, and Mars» south polar cap contains about 1016 kg of water.

Launched in January 2013, Planet Four is a Zooniverse citizen science project enlisting members of the general public to help study dark blotches and fans that appear on top of the Martian South Pole's thawing carbon dioxide ice sheet during the Southern Spring and Summer.

Amelia Shevenell from the University of South Florida specializes in big ideas about paleoceanography and the Antarctic Ice Sheet.

[2] The only current ice sheets are in Antarctica and Greenland; during the last glacial period at Last Glacial Maximum (LGM) the Laurentide ice sheet covered much of North America, the Weichselian ice sheet covered northern Europe and the Patagonian Ice Sheet covered southern South Ameriice sheets are in Antarctica and Greenland; during the last glacial period at Last Glacial Maximum (LGM) the Laurentide ice sheet covered much of North America, the Weichselian ice sheet covered northern Europe and the Patagonian Ice Sheet covered southern South Ameriice sheet covered much of North America, the Weichselian ice sheet covered northern Europe and the Patagonian Ice Sheet covered southern South Amesheet covered much of North America, the Weichselian ice sheet covered northern Europe and the Patagonian Ice Sheet covered southern South Ameriice sheet covered northern Europe and the Patagonian Ice Sheet covered southern South Amesheet covered northern Europe and the Patagonian Ice Sheet covered southern South AmeriIce Sheet covered southern South AmeSheet covered southern South America.

Apparent global warming that was progressively melting more and more of the north polar ice sheet each year has been countered by progressive expansion of the south polar ice sheet.

This ice sheet would stretch south of You to southern Illinois and north across the northern United States and Canada to the North Pole.

Glacial climatic fluctuations caused habitat changes, including the appearance of continental ice sheets as far south as Washington State [37], that may have caused range shifts in locally adapted gray fox populations, with foxes with clade B haplotypes existing as far south as southern California.

«Borehole temperatures in the ice sheets spanning the last 6000 years show Antarctica repeatedly warming when Greenland cooled, and vice versa... The phenomena has been called the polar see - saw... Attempts to account for it have included the hypothesis of a south - flowing warm ocean current with a built in time lag... There is (however) no significant delay in the Anarctica climate anomaly...

The ice sheet is almost 2,400 kilometres long in a north - south direction, and its greatest width is 1,100 kilometres at a latitude of 77 ° N, near its northern margin.

Black carbon disrupts the South Asian monsoon (by altering the land - sea temperature gradient that drives the movement of moist air), helps melt the Greenland ice sheet (by increasing the solar energy the darkened ice absorbs), and accelerates the retreat of Himalayan glaciers.

Yet the newest empirical research completely counters the fears and beliefs of the CAGW crowd: over the satellite era, some 30 + years, Antarctica's ice sheets have slightly grown and the South Pole's sea ice extent is at record levels.

Indeed, if we closely look back at the map of the «rising» /» falling» tide gauges in Figure 8, we can see that some areas which would have been under or near the ice sheets during the glacial era show mostly «falling» trends (e.g., Fennoscandia in northern Europe, Alaska in US), while neighbouring areas show mostly «rising» trends (e.g., the parts of northern Europe south of Fennoscandia, northeastern North America).

A research scientist at Ohio State's Byrd Polar Research Center, Mosley - Thompson collects ice cores from the ice sheets of Antarctica and Greenland, while colleague Lonnie Thompson, a professor of geological sciences at Ohio State, collects cores from the mountainous ice fields of China and South America.

They also explain how the «sea ice extent around Antarctica» is very different from the sea ice in the Arctic because the Arctic is not covered by land, but by ocean, albeit mostly frozen most of the time, whereas Antarctica is a vast continent covered by massive ice sheets with the South Pole at its center.

This small outlet glacier south of Jakobshavn Isbrae is moving ice from the interior of the ice sheet out to the ice sheet edge (top right), where the ice calves off into the ocean.

That the last little bit of ice in the arctic is melting, an ice sheet that once covered huge swaths of North America as far south as the US Rockies, upper Midwest and all of New England, is hardly proof that humans are changing the climate.

Warm ocean water existed south of Greenland, wedged between two major ice sheets during the last ice age.

Maybe you've caused enough heat to be moved south through the southern ocean to Antarctica and tipped parts of the Antarctic ice sheet.

To see how fast sea level may rise in the future, Carlson and his team looked to the ancient Laurentide ice sheet, which stretched as far south as Ohio and New York City during at the peak of the last Ice Age 20,000 years aice sheet, which stretched as far south as Ohio and New York City during at the peak of the last Ice Age 20,000 years aIce Age 20,000 years ago.

Previous studies had identified melting of glaciers in the island's south - east and north - west, but the assumption had been that the ice sheet to the north - east was stable.

The Greenland Ice Sheet has an area of 2.17 million square kilometers (1.28 million square miles) and spans 18o degrees of latitude from north to south.

Much like the the formation of ice sheets in Antarctica cause mammals to exchange between Europe and Asia 34 million years ago, the connection of North and South America had the same effect there.

The coldest temperature on Earth was recorded in Antarctica in 1983, when the outside air hit minus 129 degrees Fahrenheit (minus 89 degrees Celsius) at Vostok Research Station, which sits at the center of the East Antarctic Ice Sheet, about 800 miles (1,300 km) from the Geographic South Pole.

At that time, the northern third of North America was covered by the Laurentide Ice Sheet, which extended as far south as Des Moines, Iowa; Cincinnati, Ohio; and New York City.