Sentences with phrase «atmospheric ozone»
"Atmospheric ozone" refers to a layer of gas high up in the Earth's atmosphere that protects us from the sun's harmful ultraviolet rays. It acts like a shield, preventing too much of these rays from reaching the Earth's surface and causing various negative effects on living organisms, including human beings. Full definition
And the deadly factor at work may have been the destruction of atmospheric ozone, the protective screen in the stratosphere that eliminates harmful ultraviolet light.
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It is a template because humans were blamed for atmospheric ozone destruction without evidence, while natural processes were ignored.
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.
A pioneer in atmospheric ozone studies, Susan Solomon rewrites the history of a fatal polar expedition
Some industrial chemicals also destroy atmospheric ozone, which is the planet's sunscreen, protecting all life from excessive UV rays, in particular UV - B wavelengths, which causes mutations in DNA.
Their findings, published in the August 1, 2001, issue of Geophysical Research Letters, show that less than one percent of total atmospheric ozone in the Northern Hemisphere can be quickly reduced by one of these events.
Among them were the measurements of atmospheric ozone at the UK's Halley research station in Antarctica.
The region between 45 degrees N and 65 degrees N saw the lowest ever concentrations of total atmospheric ozone over the three continental regions of North America, Europe and Siberia in the winter - spring months of 1992 and 1993.
In a Perspective piece appearing in the Dec. 8 issue of Science, NASA researchers discuss the nuances that distinguish three categories of compounds and their impacts on upper atmospheric ozone: long - lasting and human - made compounds, short - lived and human - made compounds, and compounds that are short - lived and naturally emitted from the ocean.
High concentrations of atmospheric ozone appear magenta in color, and the wavy edge of the enhanced ozone region highlights wind patterns around the pole.
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.
A number of leading scientists, for instance, Paul Crutzen, who had won a Nobel Prize for his work on atmospheric ozone chemistry, told Jim that he had put together just the sort of comprehensive and convincing presentation that was needed.
Pardo, J.R., J. Cernicharo, and L. Pagani, 1998: Ground - based spectroscopic observations of atmospheric ozone from 142 to 359 GHz in southern Europe.
The Montreal Protocol was based on the false science that a variation in atmospheric ozone was due to human - produced CFCs.
Along with other researchers, Dr. Keith has proposed a field experiment to test the effect of sulfate chemicals on atmospheric ozone.
It is the depletion of atmospheric ozone that results from release of the propellant gas from aerosol spray cans, allowing white skins to accrue prestige by turning dark and darker and finally black, under the sun's ultraviolet rays.
1993: Daniel Albritton and Robert Watson — Drs. Albritton and Watson not only spent their careers conducting research on crucial environmental issues, but also served as effective advocates in the public policy arena to help promote international cooperation and action to reverse the potentially dangerous effects of the disappearance of atmospheric ozone.
When the kelp is stressed at low tide by exposure to light and atmospheric ozone, it releases iodides — single, negatively charged ions — that coat the seaweed and protect it from chemical threats, such as naturally forming hydrogen peroxide and free radicals.
Dobson units are a measure of the overhead amount of atmospheric ozone.
At the same time the lifetime of atmospheric ozone is short due to the exceptionally warm and moist conditions in the tropical West Pacific.
Volcanic dust is another threat to atmospheric ozone.
IUVS also created a map of the atmospheric ozone on Mars by detecting the absorption of ultraviolet sunlight by the molecule.
Until an atmospheric ozone - layer develops from oxygen gas released by early photosynthetic bacterial life such as cyanobacteria, Earth - type life may need to stay underwater to stay shield from damaging stellar ultraviolet radiation even under less active stars.
It has also been proposed that ultraviolet (UV) radiation, which varies more than other solar irradiance wavelengths, could amplify the solar influence on the global climate through interactions with the stratosphere and atmospheric ozone.
Chlorofluorocarbons, banned by an international agreement known as the Montreal Protocol because they eat up atmospheric ozone, are also greenhouse gases.
Ozone doesn't get as much attention, but atmospheric ozone is blamed for forest dieback, which in turn reduces carbon sequestration.
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.
Most (90 %) of the atmospheric ozone is in 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.
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.
Among the global threats, the researchers highlighted the depletion of atmospheric ozone (O3), the establishment of non-native species by colonisation or accidental introduction, rising sea temperatures, and ocean acidification.
No atmospheric ozone depletion events were observed at Summit (37); and, consequently, AMDEs are unlikely to occur in central Greenland.
It has also been proposed that ultraviolet (UV) radiation, which varies more than other solar irradiance wavelengths, could amplify the solar influence on the global climate through interactions with the stratosphere and atmospheric ozone.
Chlorofluorocarbons, banned by an international agreement known as the Montreal Protocol because they eat up atmospheric ozone, are also greenhouse gases.