Sentences with phrase «of ice age climate»

Charles, C.D., D. Rind, R. Healy, and R. Webb, 2001: Tropical cooling and the isotopic composition of precipitation in general circulation model simulations of the ice age climate.

Model simulations of ice age climate (see discussion in Section 6.4.1) yield realistic results only if the role of CO2 is accounted for.

Not exact matches

In this one lunch alone, we covered electric cars, climate change, artificial intelligence, the Fermi Paradox, consciousness, reusable rockets, colonizing Mars, creating an atmosphere on Mars, voting on Mars, genetic programming, his kids, population decline, physics vs. engineering, Edison vs. Tesla, solar power, a carbon tax, the definition of a company, warping spacetime and how this isn't actually something you can do, nanobots in your bloodstream and how this isn't actually something you can do, Galileo, Shakespeare, the American forefathers, Henry Ford, Isaac Newton, satellites, and ice ages.

They note past ages that have been equally warm or warmer without human influence, to say nothing of repeating patterns of climate change like ice ages (though I've met one of James Hansen's computer modelers who told me with sincere conviction that there would not be another ice age).

To the surprise of everyone who knew about the strong evidence for the little ice age and the medieval climate optimum, the graph showed a nearly constant temperature from the year 1000 until about 150 years ago, when the temperature began to rise abruptly like the blade of a hockey stick.

What set this in motion is uncertain, but we think it has something to do with major climatic shifts that were happening around that time — a sudden cooling in the Earth's climate driven by the onset of one of the worst parts of the last Ice Age.

Frankly, if I wanted to worry about climate change, I would worry about global cooling again, since the sun is behaving very weakly just now, and sun - watching scientists have even dared to suggest that a reprise of the Little Ice Age is in the offing.

Sea level has been rising slowly and inexorably since the end of the last ice age, and the rate has not accelerated in a warming climate.

Scientific study of the Ice Age Floods is contributing to the understanding of cyclical climate change and of very large and destructive contemporary floods on Earth.

The Earth's axis fluctuates between having a tilt of 22 degrees and 24 degrees and when the tilt is 24 degrees, there is a larger difference between summer and winter and this has an influence on the violent shifts in climate between ice ages and interglacial periods.

«One of the big questions is: Why was the climate and why were CO2 levels so different during ice ages than during warm times?

Lost ice due to climate change and left - over momentum from the end of the last big ice age mean the buoyant continent is heaven - bound.

«It seems that the sun's quiescence was responsible for the most extreme phases of the Little Ice Age, implying that solar variability sometimes plays a significant role in climate change.

A new study focusing on the birds of the Ice Age has shed light on the long term response of birds to climate change.

Professor Gavin Foster, from the University of Southampton, said: «The Intergovernmental Panel on Climate Change have shown that climate models can successfully simulate climates from the freezing world of the last Ice Age, to the intense warmth of the «Eocene greenhouse», 50 million yeaClimate Change have shown that climate models can successfully simulate climates from the freezing world of the last Ice Age, to the intense warmth of the «Eocene greenhouse», 50 million yeaclimate models can successfully simulate climates from the freezing world of the last Ice Age, to the intense warmth of the «Eocene greenhouse», 50 million years ago.

A team of UK researchers has shed new light on the climate of the Little Ice Age, and rekindled debate over the role of the sun in climate change.

One of the Science co-authors, Peter Huybers, a climate scientist at Harvard University, says he was pleased by the confirmation — especially because it comes from a fast - spreading center, where the ice age signal is more difficult to observe.

To get to the bottom of things, he mapped the ages and locations of 1,323 woolly mammoth remains and 576 archaeological sites, and he merged them with data from plant and pollen records, and climate change information from ice cores in Greenland.

The discovery of ice ages in the distant past proved that climate could change radically over the entire globe, which seemed vastly beyond anything mere humans could provoke.

But researchers from the University of Geneva (UNIGE), Switzerland, working alongside the University of Zurich, discovered that this extinction took place during a short ice age which preceded the global climate warming.

Was it humankind or climate change that caused the extinction of a considerable number of large mammals about the time of the last Ice Age?

To the surprise of many, studies of ancient climates showed that astronomical cycles had partly set the timing of the ice ages.

Buizert said reconstructing Earth's climate back to 1.5 million years is important because a shift in the frequency of ice ages took place in what is known as the Middle Pleistocene transition.

So if you think of going in [a] warming direction of 2 degrees C compared to a cooling direction of 5 degrees C, one can say that we might be changing the Earth, you know, like 40 percent of the kind of change that went on between the Ice Age; and now are going back in time and so a 2 - degree change, which is about 4 degrees F on a global average, is going to be very significant in terms of change in the distribution of vegetation, change in the kind of climate zones in certain areas, wind patterns can change, so where rainfall happens is going to shift.

They dramatically accelerated the natural breakdown of exposed rocks, according to a new study, drawing so much planet - warming carbon dioxide (CO2) from the atmosphere that they sent Earth's climate spiraling into a major ice age.

This is of great concern to ecologists because the populations in these areas include pockets with the highest levels of genetic diversity, thanks to their ancestors having survived major climate change events such as ice ages.

Using sediment gathered from the ocean floor in different areas of the world, the researchers were able to confirm that as the ice sheets started melting and the climate warmed up at the end of the last ice age, 18,000 years ago, the marine nitrogen cycle started to accelerate.

The location, date, and composition of the artifacts suggest not only that our ancestors had adapted to the climate, says Michael Waters, an archaeologist at Texas A&M University, but that they may also have been in a position to migrate across the Bering Land Bridge to North America before glaciers closed off the route at the height of the last ice age.

The new projections are based on leading research into contemporary and historical climate data, but also new scientific reconstructions of the only comparable period in human history: the last Ice Age.

«Detailed chemical measurements in Antarctic ice cores show that massive, halogen - rich eruptions from the West Antarctic Mt. Takahe volcano coincided exactly with the onset of the most rapid, widespread climate change in the Southern Hemisphere during the end of the last ice age and the start of increasing global greenhouse gas concentrations,» according to McConnell, who leads DRI's ultra-trace chemical ice core analytical laboratory.

«For the first time we can quantify how oceans responded to slow, natural climate warming as the world emerged from the last ice age,» says Prof. Eric Galbraith from McGill University's Department of Earth and Oceanic Sciences, who led the study.

«Ice age vertebrates had mixed responses to climate change: New study contradicts idea of uniform population change, has significance for understanding global warming impact.»

«Ice - ages may superficially look similar to one another, but there are important differences in the relationships between the melting of continental ice sheets and global climate changIce - ages may superficially look similar to one another, but there are important differences in the relationships between the melting of continental ice sheets and global climate changice sheets and global climate changes.

«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.»

Giant Ice Age species including elephant - sized sloths and powerful sabre - toothed cats that once roamed the windswept plains of Patagonia, southern South America, were finally felled by a perfect storm of a rapidly warming climate and humans, a new study has shown.

Guliya is thought to be the best record of midlatitude climate during the last ice age, and its ice may well turn out to be a Rosetta Stone for interpreting how Asia responds to a changing climate.

In 1964, Paul Colinvaux began his life's work — trying to understand the ice - age climate of the Amazon through mud cores and the pollen found within.

A number of theories have been developed over the years to explain more recent extinctions such as those at the end of the last ice age, including human hunting, climate change, disease, and even a cosmic impact such as an asteroid or comet.

They said that two extreme climate periods — the Medieval Warming Period between 800 and 1300 and the Little Ice Age of 1300 to 1900 — occurred worldwide, at a time before industrial emissions of greenhouse gases became abundant.

«This shift to earlier weaning age in the time leading up to woolly mammoth extinction provides compelling evidence of hunting pressure and adds to a growing body of life - history data that are inconsistent with the idea that climate changes drove the extinctions of many large ice - age mammals,» said Cherney, who is conducting the work for his doctoral dissertation in the U-M Department of Earth and Environmental Sciences.

The Isthmus of Panama plays an outsized role in ocean circulation and may be a reason that our planet currently undergoes ice ages, so the new theory could rewrite not just the history of continents and biology, but also global climate.

Climate changes following the pattern of the last ice age are therefore not anticipated under today's conditions.

New research shows that small fluctuations in the sizes of ice sheets during the last ice age were enough to trigger abrupt climate change.

Reconstruction of the climate 21,000 years ago at the peak of the last ice age in the western US found that the transition between the dryer zone in the north and wetter zone in the south ran diagonally from the northwest to southeast.

The last ice age, about 80,000 to 12,000 years ago, was a time of diverse climates, said Mann.

Earth's climate naturally varies between times of warming and periods of extreme cooling (ice ages) over thousands of years.

Sudden shifts in climate occurred at the end of the last ice age, according to American researchers studying sediments from the bed of a dry lake in New Mexico.

The results of this 20 - year study show that animal and plant communities were much more changeable during the ice age than they have been during the last 12,000 years of interglacial climate in which we live today.

«New study shows influence on climate of fresh water during last ice age.»