Sentences with phrase «of ozone shield»

The title is «UV - B — induced forest sterility: Implications of ozone shield failure in Earth's largest extinction.»

UV - B - induced forest sterility: Implications of ozone shield failure in Earth's largest extinction.

Not exact matches

And if the ozone layer of the upper atmosphere were thinner it would be ineffective in shielding ultraviolet radiation and life would not be possible.

That measure was not in time to stop the annual deterioration of Earth's protective ozone shield.

The stratospheric ozone layer, a fragile shield of gas, protects Earth from harmful ultraviolet rays of the sun.

A similar fate may have befallen forests 252 million years ago, when massive bursts of volcanic gases likely weakened Earth's ozone shield.

And ozone, which forms a beneficial shield against ultraviolet radiation when high in the stratosphere, is an efficient greenhouse gas when it appears at airliner altitudes — as it increasingly does, since it too is a by - product of fossil fuel burning.

New research shows that some leafy green plants churn out methyl bromide, a chemical that helps destroy Earth's protective shield of ozone.

But it lacked a vital ingredient: a protective shield of ozone derived from oxygen.

In the high atmosphere, ozone plays a crucial role in shielding the surface from harmful levels of ultraviolet light.

Earth's fragile shield of ozone is under assault by CFCs, substances once used widely as refrigerants, propellants, and foam - blowing agents.

«Free oxygen [O2] in the atmosphere is required to form a protective layer of ozone [O3], which can shield methane from photochemical destruction,» Reinhard said.

When the researchers ran their model with the lower oxygen estimates, the ozone shield never formed, leaving the modest puffs of methane that escaped the oceans at the mercy of destructive photochemistry.

A United Nations study has said that the ozone layer, which shields the planet from deadly cancer - causing ultraviolet rays, is showing signs of thickening again, after years of depletion.

From Zürich, lead author Dr. William Ball says Earth's ozone shield against harmful radiation continues to weaken — despite an improvement of big ozone holes over the Poles.

Early Earth lacked an ozone layer to act as a shield against high - energy solar radiation, but microbes flourished by adapting to or finding other forms of protection from the higher ultraviolet radiation levels.

From Zürich, lead author Dr. William Ball says Earth's ozone shield against harmful radiation continues to weaken — despite an improvement of big ozone holes...

Industry balked at the aggressive schedule to fully eliminate manufacture of the molecules blamed for eating away the ozone layer shielding inhabitants of our planet, especially in the southern hemisphere, from harmful ultraviolet (UV) rays from our Sun.

From Zürich, lead author Dr. William Ball says Earth's ozone shield against harmful radiation continues to weaken — despite an improvement of big ozone holes over the Poles.

Another study from University of California Berkeley says a weakened ozone shield 251 million years ago drove the mass extinction of forests, and all life that depended on them.

Absorption of solar radiation by ozone shields the terrestrial surface from harmful ultraviolet light and warms the stratosphere, producing maximum temperatures of − 15 to 10 °C (5 to 50 °F) at an altitude of 50 km (30 miles).

As many of you will know, and perhaps recall from living memory, alarm bells started ringing when pioneering research by a group of brilliant chemists (Frank Sherwood Rowland, Mario Molina and Paul Crutzen, who were jointly awarded the Nobel Prize for Chemistry in 1995) showed that chlorofluorocarbons (CFCs), a family of chemicals used in many everyday applications such as refrigeration, air conditioning and aerosols, were destroying the ozone molecules which make up the protective layer shielding Earth from the sun's harmful rays.

Ozone is a molecule made up of three oxygen atoms, and the ozone layer, which stretches from heights of 12 to 19 miles (20 to 30 kilometers) above the Earth's surface, protects life on Earth by shielding it from ultraviolet (UV) radiaOzone is a molecule made up of three oxygen atoms, and the ozone layer, which stretches from heights of 12 to 19 miles (20 to 30 kilometers) above the Earth's surface, protects life on Earth by shielding it from ultraviolet (UV) radiaozone layer, which stretches from heights of 12 to 19 miles (20 to 30 kilometers) above the Earth's surface, protects life on Earth by shielding it from ultraviolet (UV) radiation.

What did the focus of my blog post here, David Bookbinder, know about this Gelbspan / «Greenpeace USA née Ozone Action» mess and when did he know it, regarding his «outrage» over what auto manufacturers were trying to shield about Dr Michaels» funding sources?

Even before the first evidence that global warming had already begun, British and US scientists confirmed that human action — in the release of a suite of industrially - important gases called chlorofluorocarbons — had begun to erode the invisible shield of stratospheric ozone that has always sheltered life on Earth.

Ozone Layer A layer of ozone gas in the stratosphere that shields the Earth from most of the harmful ultraviolet radiation coming from theOzone Layer A layer of ozone gas in the stratosphere that shields the Earth from most of the harmful ultraviolet radiation coming from theozone gas in the stratosphere that shields the Earth from most of the harmful ultraviolet radiation coming from the Sun.

It's now known that ozone is destroyed in the stratosphere and that some human - released chemicals such as CFC's are speeding up the breakdown of ozone, so that there are «holes» now in our protective shield.