Sentences with phrase «sahara samooh»

Moreover, comparing their findings with old data on how much water the basins can store, the researchers found widely varying estimates on when basins would run 90 % dry — from 10 years to tens of thousands of years, in the case of the northwest Sahara.

A pioneering trip to the highest mountain peaks of the Sahara uncovers a dramatically different climate and landscape in the desert's past

More than a century ago, German paleontologist Ernst Stromer described Spinosaurus based on several bones from a single animal found during an expedition deep in the Sahara.

Further missions studied the Earth from above, such as one that used of a type of radar to probe below the surface — discovering ancient riverbeds beneath the Sahara Desert, for example.

A landmark for orbiting travellers, the Eye of the Sahara is a strange, 40 - kilometre - wide bullseye in the otherwise featureless desert

«Dust from the Sahara Desert cools the Iberian Peninsula.»

Results show that the intrusion of dust from the Sahara Desert caused radiative cooling of Earth's surface.

The Sahel region of Africa — a strip across the southern edge of the Sahara from the Atlantic Ocean to the Red Sea — is a semi-arid landscape between the desert to the north and the savannah to the south.

Painted lady butterflies» migration may take them across the Sahara.

The resulting turbulence creates atmospheric waves — some of which can stretch 1,500 miles — that race across the Sahara and over the Atlantic.

Deposits of windblown dust originating from the Sahara may have been responsible for the prehistoric condition of the Everglades, the vast area of wetlands at the southern end of the Florida peninsula.

Meanwhile, climatologists are predicting long - term drought, with the desert conditions of the Sahara spreading north over the coming decades.

Licht says that using STEP in an area less than 10 % the size of the Sahara desert could bring CO2 in the atmosphere down to preindustrial levels in just 10 years.

(Side note: 10 % of the Sahara desert is more than twice the area of California — that's a lot of molten lithium.)

Linguistic studies of ancient root words for chickens in African languages suggest multiple introductions of chickens to Africa following different routes: from North Africa through the Sahara to West Africa; and from the East African coast to Central Africa.

In a bid to resolve this problem, Libya is spending billions of dollars of its oil revenues on the Great Manmade River project, which is pumping ancient «fossil» waters from beneath the Sahara and piping it hundreds of kilometres north to farms on the coast, where aquifers have become exhausted and salty.

A team of German zoologists has stumbled upon a population of Nile crocodiles in an equally improbable setting: the middle of the Sahara desert.

«Between 10,500 and around 5,550 years ago, it was a good place to live,» says Stefan Kröpelin, a geoarchaeologist at the University of Cologne in Germany, who has spent the last 30 years leading excavations in the eastern Sahara, a region that until recently has been largely unexplored.

«If we have five to six degrees of warming in the next centuries, evaporation on the oceans may turn the Sahara into a savanna, as it was 10,000 years ago.»

The Sahara, which covers nearly a third of Africa, was once a lush savanna, teeming with wildlife, fish - filled lakes, and ancient humans.

The culprits in global cooling range from the operators of power stations in Europe to goat herders on the fringes of the Sahara; from farmers burning Amazon rainforests to the iron and steel manufacturers of the Far East.

Wolfgang Böhme of the Zoologisches Forschungsinstitut und Museum Alexander Koenig in Bonn, Germany, and his team found the population during a 3 - month, 6500 - kilometer expedition to study reptiles in the Western Sahara.

The Sahara began to dry up about 5000 years ago.

A trip to Iceland and a flight over the Sahara Desert help an atmospheric scientist study dust particles that seed clouds

The team's paper «Rainfall regimes of the Green Sahara,» is scheduled for publication in the journal Science Advances on Jan. 18.

Tucson - based dealer Adam Aaronson, of Sahara Overland, puts a 174 - pound chunk of the Agoudal meteorite on display at the 2014 Tucson Gem and Mineral show.

Although other research had already identified the existence of the Green Sahara period, Tierney and her colleagues are the first to compile a continuous record of the region's rainfall going 25,000 years into the past.

Toward the end of the Green Sahara, the Northern Hemisphere was farther from the sun and the West African monsoon was weaker.

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.

Other investigators have suggested the Sahara became drier at the time people left, but the evidence was not conclusive, said Tierney, a UA associate professor of geosciences.

Her team's continuous rainfall record shows a thousand - year period about 8,000 years ago when the Sahara became drier.

Our record provides a climate context for this change in occupation and lifestyle in the western Sahara.»

«It's exciting to think that 100,000 years ago there were three huge rivers forcing their way across a 1000 km of the Sahara desert to the Mediterranean — and that our ancestors could have walked alongside them» said Coulthard.

Immense areas of the plateau and volcanic soils of Africa south of the Sahara are quite unsuited to permanent agriculture.

Archaeological evidence shows humans occupied much of the Sahara during the wet period, but left for about a thousand years around 8,000 years ago — the middle of the Green Sahara period.

In the Sahel, a semi-arid belt across West Africa south of the Sahara Desert, at least 100,000 people perished and millions of cattle died for want of pasture.

A storm in Africa's Sahara Desert brought a sandy fertilizer to the Atlantic Ocean on April 8, triggering plankton blooms that show up as blue - green swirls in this photo from the European Space Agency's Envisat satellite.

At the beginning of the Green Sahara, the Northern Hemisphere was closer to the sun during summer.

Rainfall patterns in the Sahara during the 6,000 - year «Green Sahara» period have been pinpointed by analyzing marine sediments, according to new research.

«Green Sahara's ancient rainfall regime revealed.»

Researchers now think it was because the air over the Atlantic had more than the usual amount of dust blown there from the Sahara.

What is now the Sahara Desert was the home to hunter - gatherers who made their living off the animals and plants that lived in the region's savannahs and wooded grasslands 5,000 to 11,000 years ago.

Three ancient river systems, now buried, may have created viable routes for human migration across the Sahara to the Mediterranean region about 100,000 years ago, according to research published September 11 in the open access journal PLOS ONE by Tom Coulthard from the University of Hull, UK, and colleagues from other institutions.

Dust from the Sahara Desert provides most of the iron found in the Atlantic Ocean, according to research that also sheds light on how the oceans help sequester carbon dioxide

The team also wanted to know whether the conditions on land interacted with the atmosphere to affect climate, because most of the current climate models don't simulate the Green Sahara period well, she said.

Garriet Smith, a marine microbial ecologist at the University of South Carolina, Aiken, says he suspects that the aspergillus arrives as atmospheric fallout, from winds bearing sands of the Sahara.

Israel is subjected to sand and dust storms from several directions: northeast from the Sahara, northwest from Saudi Arabia and southwest from the desert regions of Syria.

According to climate simulations to be published next month in the journal Climatic Change, the forests would cool the Sahara by up to 8 °C in some areas.

For more than a century, a few scientists have occasionally daydreamed of transforming much of the Sahara desert green, with a lush inland sea or vast tracts of farmland.

Comets are supposed to be big chunks of ice and dust — «dirty snowballs» in astronomical slang — but the most thorough study of a comet's surface to date reveals a bone - dry landscape that is hotter than the Sahara at noon.