Sentences with phrase «in ancient climate»

«Warming pulses in ancient climate record link volcanoes, asteroid impact and dinosaur - killing mass extinction.»

Archaeologists have always been interested in ancient climates, given how droughts tend to contribute to the demise of one civilization after another.

Not exact matches

The tug of an ancient, unchanged liturgical tradition becomes especially pronounced in this climate,» says Coakley, a professor at Harvard Divinity School.

Although the ancient Yemenite civilization which found its stimulus in its favorable climate and trade is no more, the latent human and natural resources of the country are still there and will come to the fore when they have security from foreign invasion and can introduce modernization and democratic rule.

But the trail grows cold in eastern Asia, where warmer climates have made it hard to get ancient DNA from fossils.

And a fourth study in the same issue of Nature, this one focusing on ancient climate, also makes the case for an earlier exodus.

A University of Alaska Fairbanks - led research project has provided the first modern evidence of a landscape - level permafrost carbon feedback, in which thawing permafrost releases ancient carbon as climate - warming greenhouse gases.

With this compelling demonstration of using ancient soil samples as proxies for regional climate in Asia, Caves now plans to extend his investigations elsewhere on the globe.

«Climate change and drought in ancient times.»

The influence of climate on agriculture is believed to be a key factor in the rise and fall of societies in the Ancient Near East.

This shows that the expansion of grasslands isn't solely due to drought, but more complex climate factors are at work, both for modern Africans now and ancient Africans in the Pleistocene.

The dramatic site of Brak had been briefly excavated by Mallowan in the 1930s, but Christie found it not to her liking, since rainfall was too sparse for the flowers she loved to grow; they split their time with another ancient mound farther north with a slightly wetter climate.

Still, factors other than climate fluctuations, such as hominid population declines or surges, may also have spurred ancient tool innovations to acquire more or different types of food, cautions archaeologist Yonatan Sahle of the University of Tübingen in Germany.

Most climate projections now end at 2300 at the latest, «because that's the time period most people are interested in,» says Marcott, a expert in glaciers and ancient climate.

Meanwhile striking news came from studies of ancient climates recorded in Antarctic ice cores.

By learning more about Earth's ancient climate, scientists hope to get a glimpse of what's likely to occur in the future.

Researchers often reconstruct ancient climate from clues in sediment cores.

Using an interdisciplinary approach that combined evidence from climate modelling of large 20th - century eruptions, annual measurements of Nile summer flood heights from the Islamic Nilometer — the longest - known human record of environmental variability — between 622 and 1902, as well as descriptions of Nile flood quality in ancient papyri and inscriptions from the Ptolemaic era, the authors show how large volcanic eruptions impacted on Nile river flow, reducing the height of the agriculturally - critical summer flood.

Scientists are interested in studying ancient warming events to understand how the Earth behaves when the climate system is dramatically perturbed.

Although scientists can learn about past climate by examining ancient lake sediments, in the Sahara the lakes dried up long ago and their sediments have blown away.

Yearly flooding along the lower Nile (green swath, above) was critically important for agriculture in ancient Egypt, but a new study suggests climate - changing volcanic eruptions occasionally stifled floods.

Research led by the Australian Centre for Ancient DNA (ACAD) at the University of Adelaide, published in Science Advances, has revealed that it was only when the climate warmed, long after humans first arrived in Patagonia, did the megafauna suddenly die off around 12,300 years ago.

Even as advances in ancient - DNA technology have made it possible to probe population mixing and large - scale migrations that occurred thousands of years ago, researchers have had trouble studying the genetic history of the Near East because the region's warm climate has degraded much of the DNA in unearthed bones.

The findings are based on analyses of ancient plant leaf wax found in the sediments of the Gulf of Guinea in combination with computer models of the climate system.

Lead author William Taylor, a postdoctoral research fellow at the Max Planck Institute for the Science of Human History, says that this model «enables us for the first time to link horse use with other important cultural developments in ancient Mongolia and eastern Eurasia, and evaluate the role of climate and environmental change in the local origins of horse riding.»

But one thing hasn't changed: She's still studying climate, only this time through the lens of anthropology, looking at how climate shifts of the past influenced politics in ancient Mayan civilizations.

In conditions that redefine the word «cold» for this native Tennessean, White drills through ancient ice to unlock clues to the Earth's past climate — and predict its future.

«Ice cave in Transylvania yields window into region's past: Scientists conduct ancient climate research on oldest cave glacier in the world.»

Molecular signatures in ancient rocks show the microorganisms may have existed on Earth around 3.5 billion years ago, producing some of the greenhouse gases needed to stabilise the early Earth's climate.

A land - ocean pattern like that above was used in a climate model to show how storm clouds could have shielded ancient Venus from strong sunlight and made the planet habitable.

Venus may have had a shallow liquid - water ocean and habitable surface temperatures for up to 2 billion years of its early history, according to computer modeling of the planet's ancient climate by scientists at NASA's Goddard Institute for Space Studies (GISS) in New York.

Researchers can crack open stalagmites to uncover ancient earthquakes and changes in cave climate.

«Mammal body - size responds to climate change in ancient Wyoming.»

And perishable goods from ancient communities — including baskets, feather blankets, cobs of maize (corn) and faeces from domestic turkeys — remain intact thanks to the dry climate and the location of some dwellings in alcoves that are sheltered from rain and sunlight.

If we can analyze ancient climates, atmospheric compositions and the interplay among the crust, atmosphere, life and climate in the geologic past, we can take some first steps at understanding what is happening today and likely to happen tomorrow.»

In Earth's ancient atmosphere, scientists see the faint outlines of a carbon dioxide (CO2) roller coaster, climbing and dipping across deep time in repeated bouts of climate changIn Earth's ancient atmosphere, scientists see the faint outlines of a carbon dioxide (CO2) roller coaster, climbing and dipping across deep time in repeated bouts of climate changin repeated bouts of climate change.

This study therefore shows that climate warming is not the only explanation of global ecological disasters in the past on Earth: it is important to continue analysing ancient marine sediments to gain a deeper understanding of the earth's climate system.

An ancient irrigation system along the Tian Shan mountains of China allowed the cultivation of crops in one of the world's driest climates.

Using satellite imaging and drone reconnaissance, archaeologists from Washington University in St. Louis have discovered an ancient irrigation system that allowed a farming community in arid northwestern China to raise livestock and cultivate crops in one of the world's driest desert climates.

MEACHEM: We would really love to discover some more mammal fossils down there and what we're really hoping to get out of these mammal fossils is some good ancient DNA, that will tell us about the conditions that these animals lived in and how DNA or genes changed with climate.

«When these ancient practices are no longer reliable, that in itself is an early indication of climate change.»

Archaeologists, who studied ancient tools, ornaments, and human remains in the prehistoric rock shelter Riparo Bombrini, discovered how early homo sapiens survived a climate - changing supervolcano eruption This discovery offered clues how humans can survive climate change.

The study noted that the same climate models the UN IPCC uses can only «explain only about half of the heating that occurred during a well - documented period of rapid global warming in Earth's ancient past.»

«The study found that climate models explain only about half of the heating that occurred during a well - documented period of rapid global warming in Earth's ancient past.

If you're studying ancient climate trends then you should be aware of the many intricacies of our planets ecosystem, making this question narrow in scope.

Robert Kopp is a climate scientist at Rutgers University in Piscataway, N.J.. His team analyzed ancient sea levels from around the world.

A new study published in Scientific Reports finds that bandicoots are not only more ancient than anyone thought, they're probably no strangers to the pressures and shifts brought on by climate change.

Climate may have played a big role in the evolution of ancient peoples.

He explains how he once thought that climate change theory was based solely on computer models, where in fact it's based on scientific measurements of both modern and ancient climates.

The research from NASA's Goddard Institute for Space Studies (GISS), published this week in the journal Geophysical Research Letters, used topographical and atmospheric data collected by the Pioneer and Magellan space probes to create 3 - D climate simulations, filling in lowlands with water and accounting for an ancient sun 30 percent dimmer than it is today.