• atmosphere
  • The presence of such large amounts of the halon in the atmosphere could delay the recovery of the ozone layer by several years. (newscientist.com)
  • The high atmosphere over the Arctic lost an unprecedented amount of its protective ozone earlier this year, so much that conditions echoed the infamous ozone hole that forms annually over the opposite side of the planet, the Antarctic, scientists say. (livescience.com)
  • There is quite a different atmosphere [at higher elevation] with enough ozone to sustain the necessary energy [to work]", wrote naturalist Henry Henshaw, working in Hawaii. (wikipedia.org)
  • In fact, even Benjamin Franklin believed that the presence of cholera was connected with the deficiency or lack of ozone in the atmosphere, a sentiment shared by the British Science Association (then known simply as the British Association). (wikipedia.org)
  • reactive
  • The reactions that convert less reactive chemicals into ozone-destroying ones take place within what is known as the polar vortex, an atmospheric circulation pattern created by the rotation of the Earth and cold temperatures. (livescience.com)
  • CFCl 3 + electromagnetic radiation → Cl· + ·CFCl 2 Ozone is a highly reactive molecule that easily reduces to the more stable oxygen form with the assistance of a catalyst. (wikipedia.org)
  • destroy ozone
  • Also, complicated chemical processes destroy ozone at a rate that maintains a rough balance with its creation. (csmonitor.com)
  • A single chlorine atom would continuously destroy ozone (thus a catalyst) for up to two years (the time scale for transport back down to the troposphere) were it not for reactions that remove them from this cycle by forming reservoir species such as hydrogen chloride (HCl) and chlorine nitrate (ClONO 2). (wikipedia.org)
  • Antarctic
  • Also at the Antarctic Neumayer station , ozone sondes are launched regularly. (awi.de)
  • Some degree of ozone loss above the Arctic , and the formation of the Antarctic ozone hole, are annual events during the poles' respective winters. (livescience.com)
  • 1982
  • Referring to such limitations, the NRC's 1982 report on the ozone threat observed that there ''are still uncertainties about the appropriateness of some assumptions common in current models. (csmonitor.com)
  • CFCs
  • At no point has any expert claimed to have substantial proof that CFCs do, in fact, threaten the ozone layer. (csmonitor.com)
  • These concerns led to the adoption of the Montreal Protocol in 1987, which bans the production of CFCs, halons, and other ozone-depleting chemicals. (wikipedia.org)
  • pale blue
  • At standard temperature and pressure (0°C and 100 kilopascals pressure), ozone is a pale blue gas . (newworldencyclopedia.org)
  • In standard conditions, ozone is a pale blue gas that condenses at progressively cryogenic temperatures to a dark blue liquid and finally a violet-black solid. (wikipedia.org)
  • peak
  • The Ozone Peak is a French single-place paraglider that was designed by hang gliding and paragliding world champion pilot Robbie Whittall and produced by Ozone Gliders of Le Bar-sur-Loup. (wikipedia.org)
  • oxidation
  • Ozone is a powerful oxidant (far more so than dioxygen) and has many industrial and consumer applications related to oxidation. (wikipedia.org)
  • polar
  • Ozone is colourless or slightly bluish gas (blue when liquefied), slightly soluble in water and much more soluble in inert non-polar solvents such as carbon tetrachloride or fluorocarbons, where it forms a blue solution. (wikipedia.org)
  • high
  • Ozone is found both at high altitude and ground level. (ct.gov)
  • Other conditions affected by high ozone levels in the summertime include COPD, heart disease and diabetes. (nationaljewish.org)
  • The other part is known as the "public health" standard, which sets a legal limit on how high ozone levels can be at any one time. (washingtonpost.com)
  • Zox Ozone have been manufacturing and distributing high quality ozone generators and related products for over 10 years including commercial ozonators, air applicators, oxygen concentrators, enzyme for water management and accessories. (ferret.com.au)
  • The creek flows down from its source high in the Crab Orchard Mountains for a mile or so before steadying briefly as it enters the community of Ozone. (wikipedia.org)
  • Fall Creek
  • Ozone Falls is situated along Fall Creek, which drains a short section of the Cumberland Plateau between the Crab Orchard Mountains to the west and Walden Ridge to the east. (wikipedia.org)
  • Fall Creek passes through the western part of Ozone before spilling over Ozone Falls and cutting a gorge that forms the community's southern boundary. (wikipedia.org)
  • radiation
  • Eventually the spectrum of the missing radiation was matched to only one known chemical, ozone. (wikipedia.org)
  • Nevertheless, some UV-B, particularly at its longest wavelengths, reaches the surface, and is important for the skin's production of vitamin D. Ozone is transparent to most UV-A, so most of this longer-wavelength UV radiation reaches the surface, and it constitutes most of the UV reaching the Earth. (wikipedia.org)
  • processes
  • In the troposphere, ozone is produced from O 2 by many processes, including lightning strikes and combustion. (newworldencyclopedia.org)
  • the chlorine is free to repeat this two-step cycle The overall effect is a decrease in the amount of ozone, though the rate of these processes can be decreased by the effects of null cycles. (wikipedia.org)
  • Reactions
  • In 1785, the Dutch chemist Martinus van Marum was conducting experiments involving electrical sparking above water when he noticed an unusual smell, which he attributed to the electrical reactions, failing to realize that he had in fact created ozone. (wikipedia.org)
  • 1980s
  • But the scientists didn't see any significant improvement in ozone tolerance in soybean varieties released since the 1980s. (redorbit.com)
  • Wildlife
  • EPA officials initially tried to set a lower seasonal limit on ozone to protect wildlife, parks and farmland, as required under the law. (washingtonpost.com)
  • naturally
  • Among other things, the NRC has urged monitoring the ozone layer through two full sunspot cycles (some 22 years) to see how ozone varies naturally with solar activity. (csmonitor.com)
  • In addition, ozone is naturally produced by white blood cells and the roots of marigolds as a means of destroying foreign bodies. (newworldencyclopedia.org)
  • causes
  • Since UV, which causes sunburn, is considered dangerous to living tissue, any significant weakening of the ozone shield would be of concern. (csmonitor.com)
  • decade
  • Under the Clean Air Act, the federal government must reexamine every five years whether its ozone standards are adequate, and the rules that the EPA issued Wednesday will help determine the nation's air quality for at least a decade. (washingtonpost.com)
  • levels
  • Ozone levels often increase with summer wildfires, further worsening the air quality and ozone-related breathing issues. (nationaljewish.org)
  • Some types of electrical equipment generate significant levels of ozone. (newworldencyclopedia.org)
  • Ozone loss is expected to improve in the coming decades as atmospheric levels of these chemicals decline. (livescience.com)
  • Ozone levels stabilized by the mid-1990s and began to recover in the 2000s. (wikipedia.org)
  • Recovery is projected to continue over the next century, and the ozone hole is expected to reach pre-1980 levels by around 2075. (wikipedia.org)
  • unusual
  • The Environmental Protection Agency weakened one part of its new limits on smog-forming ozone after an unusual last-minute intervention by President Bush, according to documents released by the EPA. (washingtonpost.com)
  • Ozone has been noted for its unusual place name. (wikipedia.org)
  • temperatures
  • Ozone's instability with regard to more common dioxygen is such that both concentrated gas and liquid ozone may decompose explosively at elevated temperatures or fast warming to the boiling point. (wikipedia.org)
  • percent
  • The researchers found that exposure to 82 parts per billion (ppb) ozone reduced soybean yields by an average 23 percent across all 10 varieties. (redorbit.com)
  • The new forecast, released last week, projects between 2 and 4 percent ozone loss. (csmonitor.com)
  • hole
  • For the first time, sufficient loss occurred to reasonably be described as an Arctic ozone hole,' write researchers in an article released Oct. 2 by the journal Nature. (livescience.com)
  • The same dynamics create the infamous ozone hole over Antarctica. (livescience.com)
  • The latter phenomenon is referred to as the ozone hole. (wikipedia.org)