Sentences with phrase «destroy ozone in the stratosphere»

Natural capital degradation: simplified summary of how chlorofluorocarbons (CFCs) and other chlorine - containing compounds can destroy ozone in the stratosphere faster than it is formed.

Figure 20.18 Natural capital degradation: simplified summary of how chlorofluorocarbons (CFCs) and other chlorine - containing compounds can destroy ozone in the stratosphere faster than it is formed.

Not exact matches

Thirty years ago, the Montreal Protocol was agreed to phase - out chemicals destroying the ozone layer, the UV - radiation shield in the Earth's stratosphere.

Ueno says that once aerosols are in the stratosphere they become very stable and can last for years, compared with days or weeks in the troposphere, and they can activate compounds such as chlorine that destroy the ozone layer.

A 20 - year study by German scientists has found that the rate of increase of CFC - 12, a chlorofluorocarbon compound that spawns ozone - destroying reactions in the stratosphere, has slowed since 1990, although absolute levels are still rising.

«This is the only long - term data set with regular measurements of ozone - destroying compounds in the stratosphere,» says atmospheric chemist Darin Toohey of the University of California, Irvine.

Because they are released in large quantities from tropical oceans, they are rapidly lofted by tropical thunderstorms into the stratosphere within a month or two where they can destroy ozone for a larger portion of their lifetimes.

No specific mention of the «volume cold enough for ozone loss» trend line is made in the Nature text, although it is stated that «Certain clouds in the stratosphere provide surfaces on which CFC decay products are converted into forms that destroy ozone â??

Also, the overall number of ozone molecules destroyed in a vertical column of air was pretty much the same as the number of molecules transported into this column by the average poleward and downward transport of air in the stratosphere.

Although production of ozone - destroying gases has been curtailed under international agreements, concentrations of the gases in the stratosphere are only now reaching their peak.

By destroying ozone (itself a greenhouse gas) in the stratosphere, CFCs also affect the climate indirectly in ways that are still not fully understood.

On the other hand, CFCs destroy ozone (a GHG) in the stratosphere.

«The rate at which ozone is being destroyed in the upper stratosphere is slowing, and the levels of ozone - destroying chlorine in that layer of the atmosphere have peaked and are going down»

The other is that very short - lived substances (VSLSs), which contain chlorine and bromine, could be destroying ozone in the lower stratosphere.

In 1974, Dr. Mario Molina and Dr. Sherwood Roland of the University of California published a paper asserting that chlorofluorocarbon (CFC) pollution from industry was destroying the ozone layer in Earth's stratospherIn 1974, Dr. Mario Molina and Dr. Sherwood Roland of the University of California published a paper asserting that chlorofluorocarbon (CFC) pollution from industry was destroying the ozone layer in Earth's stratospherin Earth's stratosphere.

«Growing quantities of DCM are leaking into the stratosphere, where it is exceptionally effective in destroying the ozone,» said David Rowley, an atmospheric chemist at the University College London, who was not involved in the research.

Once water vapor gets into the normally dry stratosphere, it can in theory interact with manmade chlorine compounds known as chlorofluorocarbons, or CFC's, to destroy ozone molecules.

Ozone in the stratosphere is constantly being created and destroyed by the action of light and photochemistry.

Secondly, human CFCs were destroying ozone thus reducing its warming power in the stratosphere when the sun became more active.

An unusual persistence of cold temperatures in the stratosphere into March, allowing longer lifetimes for the polar stratospheric clouds that enable conversion of pollutant gases into ozone - destroying chlorine.

Another pathway even less studied is caused by the energetic particle rain at polar regions, where HOₓ and NOₓ chemical species are created in the polar regions of the thermosphere and mesosphere and transported down to the stratosphere where they destroy ozone.

The result would be a planet on which humans could work and survive outdoors in the summer only in mountainous regions [115,116]-- and there they would need to contend with the fact that a moist stratosphere would have destroyed the ozone layer [117].

But this year, an Arctic counterpart emerged for the first time, thanks to unusually cold temperatures in the stratosphere plus lingering ozone - destroying pollutants.

It may be a matter of semantics, she concedes, but there was a rapid resupply of ozone from outside the Arctic vortex (that swirling wall of winds in the stratosphere that largely corrals a patch of atmosphere, rendering it vulnerable to ozone - destroying chemical reactions).

Water vapor breaks down in the stratosphere, releasing reactive hydrogen oxide molecules that destroy ozone.

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.