Sentences with phrase «rising ozone concentrations»

«The increased risk of ozone damage to vegetation is mainly due to rising ozone concentrations and higher temperatures in the future,» says Jenny Klingberg at the University of Gothenburg's Department of Plant and Environmental Sciences.

Not exact matches

Although the Montreal Protocol came into force in 1987 and restricted the use of ozone - depleting substances, atmospheric concentrations of these harmful substances continued to rise as they can survive in the atmosphere for many years.

a) How will the recovering ozone hole and rising greenhouse - gas concentrations affect regional and global atmospheric circulation and climate?

The team's results show that human - induced (anthropogenic) changes in well - mixed greenhouse gases, which are fairly evenly distributed in the atmosphere, and ozone, a greenhouse gas that is found in higher concentrations in the stratosphere, are the primary causes of the approximately 200 - meter rise in the tropopause that has occurred since 1979.

-- The second, being the observed change of some trees» CO2 - enhanced growth storing more carbon in their standing wood, is of very limited potential and is not rising at anywhere near the rate of the countervailing increase since 1980 of the impacts on forests of droughts, heat waves and surface ozone concentrations in terms of growth - suppression and of pests, ailments, dieback and rising frequency, duration and intensity of wildfires.

* 20 to 30 % of plant and animal species likely to be at increased risk of extinction * many millions more people than today projected to experience floods every year due to sea level rise * increases in malnutrition; increased deaths, diseases and injury due to extreme weather events; increased burden of diarrhoeal diseases; increased frequency of cardio - respiratory diseases due to higher concentrations of ground - level ozone in urban areas * hundreds of millions of people exposed to increased water stress

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.

This study of course does not take away very different concerns related to stratospheric aerosol SRM geoengineering, like possible damage to the ozone layer [which in turn would be good news if you hate waiting for that spring tan] and the fact that allowing CO2 concentrations to keep rising presents other problems, like the necessity to never stop with the active process of SRM geoengineering, and increasing ecological damage caused by ocean acidification.

Since a sustainable future based on the continued extraction of coal, oil and gas in the «business - as - usual mode» will not be possible because of both resource depletion and environmental damages (as caused, e.g., by dangerous sea level rise) we urge our societies to -LSB-...] Reduce the concentrations of warming air pollutants (dark soot, methane, lower atmosphere ozone, and hydrofluorocarbons) by as much as 50 % [and] cut the climate forcers that have short atmospheric lifetimes.

Concentrations of ground level ozone could increase as air temperatures rise, causing respiratory illnesses, especially in urban areas, to increase.

That increase will have a disproportionately large impact on vegetation because ozone concentrations in many locations will rise above the critical level where adverse effects are observed in plants and ecosystems.