Sentences with phrase «ancient atmosphere»

But models of ancient atmospheres and tools for teasing out past CO2 levels from fossils and rocks all have limitations.

The new results might even help earth scientists who seek to infer the thickness of Earth's ancient atmosphere based on the size of raindrop craters left in now - hardened volcanic ash.

Except of ancient atmosphere, Prague is proud of the culinary traditions.

The researchers started with a state - of - the - art climate model for Mars — one that assumes an ancient atmosphere composed largely of carbon dioxide (as it is today).

It is not yet clear how much of Mars's ancient atmosphere might have been turned to stone.

This gradual weathering helped cut down CO2 in the ancient atmosphere to levels that were low enough for life to flourish, says Geoff Brent, senior scientist at Orica, an explosives manufacturer that will supply the pilot plant with CO2 — a by - product of its manufacture of ammonium nitrate.

Scientists think this oxygen could provide a historical record of our planet's ancient atmosphere.

A spacecraft has uncovered in lunar soil some traces of Earth's ancient atmosphere that were key to the development of complex life

That, they say, suggests that the ancient atmosphere was slightly thicker.

One extrapolation we could make, for instance: Would this mechanism work in an ancient atmosphere?

But no one had effectively confirmed the second half of the hypothesis that through photosynthesis, the carbon dioxide from the ancient atmosphere was absorbed into the cells of the algae in those blooms, and when they died or were eaten, that carbon sank deep into the ocean.

In 2005, the European Consortium for Ice Coring in Antarctica (EPICA) drilled an ice core in Dome C on east Antarctica's plateau that stretches our record of the ancient atmosphere back 800,000 years (Quaternary Science Reviews, DOI: 10.1016 / j.quascirev.2010.10.002).

Confirmation of this idea requires a direct record of the ancient atmosphere — and this can be recovered by analysing the air that became trapped in tiny bubbles within ice as the snow it formed from fell to Earth.

Ice cores taken from the South Pole tell a story about Earth's ancient atmosphere.

Using a pipette full of water, fresh volcanic ash and mathematical modelling, Sanjoy Som at the University of Washington in Seattle worked out how the size of imprints related to the speed at which the rain fell through the ancient atmosphere.

However, while Sparrow and Kessler dated methane found in modern - day seawater, Petrenko radiocarbon dated methane from the ancient atmosphere that was preserved in the ice of Arctic glaciers.

This helped cut the proportion of the gas in the ancient atmosphere to levels low enough for life to flourish, says Geoff Brent, senior scientist at Orica, an explosives manufacturer based in Melbourne.

Back in 1851 pioneering geologist Charles Lyell suggested that measuring the fossilized indentations of raindrops might reveal details about the ancient atmosphere.

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 change.

An experiment that used lasers to zap carbon dioxide suggests ultraviolet light from the sun might have helped boost oxygen gas levels in Earth's ancient atmosphere.

The findings, which appear in the Dec. 1 edition of the journal Nature, are the first direct evidence of what the ancient atmosphere of the planet was like soon after its formation and directly challenge years of research on the type of atmosphere out of which life arose on the planet.

But the scientists cautioned that more observations are needed to learn about the layers, purity, and thickness of these ice deposits — which could show things such as the composition of the ancient atmosphere.

You can trot in the breathtaking countryside on the city outskirts ad absorb the ancient atmosphere.

It represents the perfect fusion of the ancient atmospheres of the sixteenth century building that houses it and the exclusive design studied by Philippe Starck for public areas, rooms and suites.

Li said scientists believe that the atmosphere in Titan is like the ancient atmosphere on our own planet.

These ice layers also trap tiny bubbles from the ancient atmosphere, allowing us to measure prehistoric CO ₂ levels directly.

Do ice cores from Greenland and Antarctica contain air of Earth's ancient atmospheres, or do these ice cores contain only artifacts of glacier dynamics?

The temperature at which the snow formed is recorded in the chemistry of the snow and bubbles of air trapped in the snow contain samples of the ancient atmosphere.

Paleobotanists, for example, use plant matter to characterize the ancient atmosphere — they are almost literally reading tea leaves.

Each yearly record of ice can reveal past temperatures and precipitation levels, the content of ancient atmospheres and even evidence for the timing and magnitude of distant storms, fires and volcanic eruptions, said White.