Sentences with phrase «ozone production in»

«Enhanced ozone production in urban areas is a concern because of the population size potentially impacted and because air pollution levels could be already elevated due to local and mobile sources,» explains Larsen.

Not exact matches

The Montreal Protocol and London Amendment negotiations saw participation in the ozone negotiations expand from a small set of largely industrialised countries to widespread participation from developing countries, many with little to do with CFC production.

Industrial emissions of a chemical commonly used in solvents, paint removers, and the production of pharmaceuticals have doubled in the past few years, researchers have found, which could slow the healing of the ozone layer over Antarctica anywhere between 5 and 30 years — or even longer if levels continue to rise.

Recently, additional ozone production mechanisms have been proposed to resolve the ozone deficit problem, which arises from greater ozone destruction than production in several photochemical models of the upper stratosphere and lower mesosphere.

By contrast, nitrous oxide, a by - product of food production, is both a powerful greenhouse gas and an ozone depleting gas, and is likely to become more important in future ozone depletion.

In this study in Timothy grass, researchers led by environmental health scientist Christine Rogers of the UMass Amherst School of Public Health and Health Sciences (SPHHS) determined the interactive effects of CO2 and ozone at projected higher levels on pollen production and concentrations of a Timothy grass pollen protein that is a major human allergeIn this study in Timothy grass, researchers led by environmental health scientist Christine Rogers of the UMass Amherst School of Public Health and Health Sciences (SPHHS) determined the interactive effects of CO2 and ozone at projected higher levels on pollen production and concentrations of a Timothy grass pollen protein that is a major human allergein Timothy grass, researchers led by environmental health scientist Christine Rogers of the UMass Amherst School of Public Health and Health Sciences (SPHHS) determined the interactive effects of CO2 and ozone at projected higher levels on pollen production and concentrations of a Timothy grass pollen protein that is a major human allergen.

While elevated ozone did decrease the Phl p 5 allergen content in pollen, «the strong CO2 - stimulation of pollen production suggests increased exposure to Timothy grass allergen overall,» even if O3 projections are realized, the authors note.

Ozone production rates dropped by up to 50 percent in six years, Cohan and his colleagues found in a follow - up study (pdf).

They propose that cosmic rays contribute to ozone depletion through their interactions with human - made chlorofluorocarbons (CFCs) in the atmosphere: electrons created by cosmic rays break down CFC molecules, leading to the production of chorine atoms, which in turn break down ozone.

«More specifically, different colors (or wavelengths) of ultraviolet light can affect oxygen and ozone production and destruction in different ways.»

(Industrial sectors such as oil and gas production don't emit ozone directly; rather, they emit compounds — such as nitrogen oxides and volatile organic compounds — that get converted to ozone in the atmosphere.)

«Increasing background ozone from rising Asian emissions leaves less room for local production of ozone before the federal standard is violated,» said lead author Meiyun Lin, a research scholar in the Program in Atmospheric and Oceanic Sciences at Princeton University and a scientist at GFDL.

(Production of CFCs in now banned in most of the world, but because of their ozone destroying properties, not greenhouse properties.)

Wheat in all the major production regions is more sensitive to ozone pollution than to higher temperatures, for instance.

In the lower stratosphere — closest to the surface and close to the equator — increased CO2 is slowing the production of new ozone, especially in the sprinIn the lower stratosphere — closest to the surface and close to the equator — increased CO2 is slowing the production of new ozone, especially in the sprinin the spring.

Traffic - related pollution and sunlight can combine to promote the production of ozone — a powerful asthma trigger — and the stagnant, humid air of heat waves traps particulate matter and other pollutants, causing them to hang in the air and become more concentrated.

«The beauty of ozone is that ozone works with mitochondria and increases ATP production,» says Dr. Fen - Hui Chen, a holistic dentist in La Jolla, California, who has extensive training in ozone therapies and uses it daily to treat her dental patients.

O3 - Ozone Therapy: Ozone Tents, Ozonated Olive Oil, Ozone Sauna Therapy - While Ozone is not compatible for use in colloidal silver or with colloidal silver production / generation methods, ozone therapy offers extraordinarily powerful treatment modalities to address chronic illness and wellOzone Therapy: Ozone Tents, Ozonated Olive Oil, Ozone Sauna Therapy - While Ozone is not compatible for use in colloidal silver or with colloidal silver production / generation methods, ozone therapy offers extraordinarily powerful treatment modalities to address chronic illness and wellOzone Tents, Ozonated Olive Oil, Ozone Sauna Therapy - While Ozone is not compatible for use in colloidal silver or with colloidal silver production / generation methods, ozone therapy offers extraordinarily powerful treatment modalities to address chronic illness and wellOzone Sauna Therapy - While Ozone is not compatible for use in colloidal silver or with colloidal silver production / generation methods, ozone therapy offers extraordinarily powerful treatment modalities to address chronic illness and wellOzone is not compatible for use in colloidal silver or with colloidal silver production / generation methods, ozone therapy offers extraordinarily powerful treatment modalities to address chronic illness and wellozone therapy offers extraordinarily powerful treatment modalities to address chronic illness and wellness.

Furthermore, the change in UV has an impact on the production of ozone itself (even down into the troposphere).

and 1998 snippets Methane now contributes about 20 % to the increased direct radiative forcing by greenhouse gases compared to preindustrial times [Shine et al., 1995] Oxidation of CH4 in the troposphere produces carbon monoxide (CO), can lead production of ozone (03), and involves atmospheric oxidant, the hydroxyl radical (OH).

In some rough order of certainty we can consider that the 11 year solar cycle impacts on the following are well accepted: stratospheric ozone, cosmogenic isotope production, upper atmospheric geopotential heights, stratospheric temperatures and (slightly less certain and with small magnitudes ~ 0.1 deg C) tropospheric and ocean temperatures.

Changes in weather patterns, the eruption of volcanos, changes in ultraviolet output of the sun linked to the 10 - 11 year solar cycle and other natural phenomena can, like CFCs, inhibit the production of ozone.»

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.

One is even used in the production of an ozone - friendly replacement for CFCs.

For example, in the Cincinnati - Dayton region, assuming an ozone standard of 70 ppb, production would decline by $ 14.8 billion, killing 91,700 jobs in 2030.

Changes in chemistry effect the production of ozone and nitrogen compounds, the lifetime of CFCs, and probably cloud formation.

Over the last 21 years global implementation of the Montreal Protocol on Substances that Deplete the Ozone Layer (Montreal Protocol) as successfully phased out the consumption and production of ozone - depleting substances (ODS) by 95 % in developed countries and 50 - 75 % of the ODS in developing countOzone Layer (Montreal Protocol) as successfully phased out the consumption and production of ozone - depleting substances (ODS) by 95 % in developed countries and 50 - 75 % of the ODS in developing countozone - depleting substances (ODS) by 95 % in developed countries and 50 - 75 % of the ODS in developing countries.

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.

In the analysis, Dr. Hansen and his colleagues culled data and scientific papers on topics from rice production, which releases methane, to urban pollution, a source of ozone and sooty particles, to obtain detailed estimates of the rate of change in different greenhouse emissionIn the analysis, Dr. Hansen and his colleagues culled data and scientific papers on topics from rice production, which releases methane, to urban pollution, a source of ozone and sooty particles, to obtain detailed estimates of the rate of change in different greenhouse emissionin different greenhouse emissions.

That incentive has driven plants in the developing world not only to increase production of the coolant gas but also to keep it high — a huge problem because the coolant itself contributes to global warming and depletes the ozone layer.

The presentation links the production of the nitrogen compounds that degrade ozone to change in the AP geomagnetic index.

In the industrial production of ozone the air is dried by chilling it to minus 80 °C because ozone is very soluble in wateIn the industrial production of ozone the air is dried by chilling it to minus 80 °C because ozone is very soluble in watein water.

In 1987, under the Montreal Protocol, countries agreed to end production of ozone - destroying substances, including chlorofluorocarbons — but because they linger in the atmosphere, ozone losses aren't expected to end for the next 50 years or so, Rex saiIn 1987, under the Montreal Protocol, countries agreed to end production of ozone - destroying substances, including chlorofluorocarbons — but because they linger in the atmosphere, ozone losses aren't expected to end for the next 50 years or so, Rex saiin the atmosphere, ozone losses aren't expected to end for the next 50 years or so, Rex said.

Good news is that many countries at COP19 have specifically identified using the Montreal Protocol, the treaty set up to tackle the hole in the ozone layer, to phase down the consumption and production of these super greenhouse gases while allowing the UNFCCC to account for HFC emissions.

27 In the late 1970s, the United States and many other countries banned most uses of CFCs in aerosol sprays In 1990, many nations agreed to phase out the production and use of CFCs The size of the ozone layer is expected to gradually shrink over time as these decreases take effect RESULTS OF OZONE DEPLETIIn the late 1970s, the United States and many other countries banned most uses of CFCs in aerosol sprays In 1990, many nations agreed to phase out the production and use of CFCs The size of the ozone layer is expected to gradually shrink over time as these decreases take effect RESULTS OF OZONE DEPLETIin aerosol sprays In 1990, many nations agreed to phase out the production and use of CFCs The size of the ozone layer is expected to gradually shrink over time as these decreases take effect RESULTS OF OZONE DEPLETIIn 1990, many nations agreed to phase out the production and use of CFCs The size of the ozone layer is expected to gradually shrink over time as these decreases take effect RESULTS OF OZONE DEPLozone layer is expected to gradually shrink over time as these decreases take effect RESULTS OF OZONE DEPLOZONE DEPLETION

«Human - Generated Ozone Will Damage Crops, Reduce Production... MIT, 2007... A novel MIT study concludes that increasing levels of ozone due to the growing use of fossil fuels will damage global vegetation, resulting in serious costs to the world's ecoOzone Will Damage Crops, Reduce Production... MIT, 2007... A novel MIT study concludes that increasing levels of ozone due to the growing use of fossil fuels will damage global vegetation, resulting in serious costs to the world's ecoozone due to the growing use of fossil fuels will damage global vegetation, resulting in serious costs to the world's economy.

Changes in vertical transport within the troposphere are also important, in view of the rapid increase in both ozone production efficiency and ozone lifetime with altitude.

In this study, we estimate ozone impacts on crop production and subsequent impacts on land use in the 2005 — .In this study, we estimate ozone impacts on crop production and subsequent impacts on land use in the 2005 — .in the 2005 — ...

Its not an absence of ozone production — or you would same in arctic.

In 1987, nations adopted the Montreal Protocol and agreed to phase out the production and use of so - called ozone - depleting substances.

Countries agreed to end their production of the substances ultimately responsible for destruction of the ozone in 1987 with the Montreal Protocol.

The atmospheric abundances of major greenhouse gases that deplete stratospheric ozone are decreasing (CFC - 11, CFC - 113, CH3CCl3, CCl4), or increasing more slowly (CFC - 12), in response to the phase - out in their production agreed to under the Montreal Protocol and its Amendments.

In an effort to protect the ozone layer, a global pact called the Montreal Protocol was signed in 1987 banning further production of CFCIn an effort to protect the ozone layer, a global pact called the Montreal Protocol was signed in 1987 banning further production of CFCin 1987 banning further production of CFCs.

China has agreed to accept up to US$ 385 million from the Montreal Protocol's Multilateral Fund (MLF) for the elimination of its industrial production of ozone depleting substances known as HCFC (hyrdochlorofluorocarbons) and associated by - product HFC - 23 in accordance with best practices to minimize associated climate impacts...

The stratospheric ozone tracer is defined as equal to ozone in the stratosphere, and including standard ozone removal (but not production) in the troposphere, where the tropopause is the WMO meteorological tropopause.

Changes in the total solar irradiance (TSI) with enhanced extreme ultraviolet (EUV) emission have been hypothesized to induce a dynamic air / ocean circulation response resulting from stratospheric ozone production (Lean & Rind 1998).

Just as much of the US east of Appalachia is in the midst of a serious heat wave comes word that kudzu — that hyper - invasive vine that can grow up to seven feet a week and will cover everything in its path — contributes to the production of ozone.