Sentences with phrase «atmospheric ozone layer»

The Dutch climatologist, awarded a 1995 Nobel in chemistry for his work uncovering the threat to Earth's atmospheric ozone layer, suggested that balloons bearing heavy guns be used to carry sulfates high aloft and fire them into the stratosphere.

In particular, they have shown that the atmospheric ozone layer is very sensitive to emission chemicals produced by human activity, and these discoveries have led to international legislation.

Last week, one of these unexpected disasters was suddenly revealed: a paper in Science argued that powerful thunderstorms threaten to rip a hole in the atmospheric ozone layer that protects the planet's surface from dangerous ultraviolet (UV) radiation from the sun.

Not exact matches

This «would create a persistent layer of black carbon particles in the northern stratosphere that could cause potentially significant changes in the global atmospheric circulation and distributions of ozone and temperature,» they concluded.

By the late 1980s it became clear that global atmospheric pollution causing both the greenhouse effect and the hole in the ozone layer had become critical threats to life on earth (Henderson - Sellers & Blong 1989).

Those techniques have led to everything from the development of catalysts that remove poisonous carbon monoxide from car exhaust to the understanding of how ice crystals in stratospheric clouds supercharge atmospheric chlorine's ability to destroy the planet's protective ozone layer.

The meeting was the first large - scale attempt to bridge the gap between scientists and policymakers on a wide range of atmospheric problems, including not just the greenhouse effect but also acid rain and the depletion of the protective layer of ozone in the stratosphere.

In the new study, the researchers used a state - of - the - art 3D computer model of atmospheric chemistry to investigate what would have happened to the ozone layer if the Montreal Protocol had not been implemented.

At a symposium in Germany last week, atmospheric chemists debated for the first time whether aircraft should be banned from the stratosphere in order to protect the ozone layer.

Pollutants that gather from India and China in the lowlands around the mountains can be boosted as high as 18 kilometers, reaching the stratosphere — the atmospheric layer directly above the troposphere that contains most of Earth's ozone.

The council is to step up its research into atmospheric pollution, and says that this could result in the re-routeing of aircraft to avoid damage to the ozone layer.

Name one detrimental effect of UV light when it is not stopped by ozone in upper atmospheric layers.

What is still contentious is what the result implies for the YD climate change and the megafaunal extinctions, incorporating the ideas of both the broad large scale cometary debris impact scenario at low grazing angles, and the direct asteroidal impact into water and ice covered surfaces, and all that implies with the ice sheet disruptions, megatsunamis and the ozone layer and atmospheric effects and disruption that are possible in these events.

I spent a few minutes Wednesday with F. Sherwood Rowland, the atmospheric chemist from the University of California, Irvine, who shared a Nobel Prize for his work revealing the threat to the ozone layer from CFC's and similar synthetic chemicals.

At that time, there was also a newly perceived global atmospheric threat — the damage to the ozone layer from chlorofluorocarbons (CFCs) and other synthetic compounds — and an international solution in a treaty that banned the chemicals.

Halogenated gases currently contribute 12 % to overall radiative forcing.1 While actions under the Montreal Protocol on Substances that Deplete the Ozone Layer (Montreal Protocol) are already addressing CFCs and HCFCs, atmospheric concentrations of some HFCs (hydrofluorocarbons) are rising rapidly, by more than 23 % each year.

As a result of the discovery of ozone depletion and the scientific advances that delineated its causes, efforts to reduce the production, and ultimately the atmospheric concentrations, of ozone - depleting chemicals were begun in the late 1980s through the ratification of the Montreal Protocol on Substances that Deplete the Ozone Layer by many countries across the gozone depletion and the scientific advances that delineated its causes, efforts to reduce the production, and ultimately the atmospheric concentrations, of ozone - depleting chemicals were begun in the late 1980s through the ratification of the Montreal Protocol on Substances that Deplete the Ozone Layer by many countries across the gozone - depleting chemicals were begun in the late 1980s through the ratification of the Montreal Protocol on Substances that Deplete the Ozone Layer by many countries across the gOzone Layer by many countries across the globe.

NOAA's role as a steward of the atmospheric environment has enabled it to play a central role in enhancing our understanding of the ozone layer and ozone layer depletion, and in gauging the effectiveness of measures taken to restore the ozone layer to its original strength.

Measurements show that depletion of the ozone layer steadily worsened during the 1980s and most of the 1990s, but more recently as atmospheric amounts of chlorine and bromine have stabilized, a further worsening of ozone depletion appears to have been avoided.

Other aspects (temperature, winds, etc.) of the atmospheric environment and chemicals other than halocarbons can also influence the ozone layer.

Progress continues on reducing atmospheric amounts of chlorine and bromine so as to allow for the recovery of the ozone layer.

The scientific goal is to determine and interpret trends in global stratospheric ozone, the Antarctic ozone hole, and global atmospheric ozone depleting substances; to investigate these trends for signs of recovery of the ozone layer and evaluate implications for climate change; and to study the efficacy of newly proposed substitutes for currently used ozone - depleting substances.

Efforts are currently underway to explore the range of potential future atmospheric conditions and how they might influence the health of the ozone layer.

Continued monitoring of ozone and ozone - depleting substances is essential for verification of ozone layer recovery as expected by about 2050, which hinges on the complete elimination of atmospheric ozone - depleting substances.

«From his groundbreaking research that expanded understanding of the hole in the ozone layer to his work in quantifying the chemical interactions that drive climate change, Don Wuebbles has been a pioneer in atmospheric science for more than thirty years.

The fact of the Monstreal Protocol's existence seems to stand as conclusive proof of the environmentalists» presuppositions and claims, both with respect to the ozone layer, and atmospheric CO2.

Pollutants that gather from India and China in the lowlands around the mountains can be boosted as high as 18 kilometers, reaching the stratosphere — the atmospheric layer directly above the troposphere that contains most of Earth's ozone.

arctic-news.blogspot.com/…/charting-mankinds-expressway-to-extinctio… Aug 12, 2012 — The exponential increase in the Arctic atmospheric methane derived from the destabilization... formed above the ozone layer at 30 km to 50 km altitude (Ehret, 2010).

Bromine, the ozone - depleting element found in methyl bromide, is nearly 60 times more effective at destroying ozone than the chlorine found in CFCs.9 This means that even though its atmospheric lifetime is quite short (a little over a year) 31, the immediate impact of changes in methyl bromide emissions on the ozone layer is very high compared to other chemicals.