Sentences with phrase «role in ozone»

Some of the climate relevant reactions occur in this region producing atomic oxygen and nitric oxide that later play a large role in ozone formation / control at lower levels.

As scientists race to better understand humankind's role in ozone loss, they must first be able to tease out the natural causes.

Thus, we come to a dead end: calculations of nucleation become impossible below Tlim with Boltzmann statistics although many cirrus clouds may form at these T (especially in the tropics), polar stratospheric clouds, playing important role in ozone depletion, noctilucent and mesospheric clouds form at even lower T. Vitaly Khvorostyanov

Aircraft emissions probably play a crucial role in ozone destruction by fuelling the formation of polar stratospheric clouds.

These include methane, nitrous oxide («laughing gas»), halons, methyl bromide and chlorofluorocarbons (CFCs), which are notorious as «ozone killers» because they play a major role in ozone depletion in the polar regions.

Not exact matches

Climate change, smog, acid rain, dead zones and the ozone hole are real issues affecting the planet, and nitrogen pollution plays a key role in each of them.

«We are quickly running out of time to prevent hugely dangerous, expensive, and perhaps unmanageable climate change,» wrote the report's authors, who include former U.N. Environment Programme chief Achim Steiner and Mexican chemist Mario Molina, who won the Nobel Prize for his role in discovering the threat that chlorofluorocarbon gases pose to the Earth's ozone layer.

The combined processes of unburned leakage and incomplete combustion of LPG play a significant role in causing the excessive ozone characteristic of Mexico City.

This reaction could play an important role in explaining the observed depletion of ozone over Antarctica; it releases photolytically active chlorine from its most abundant reservoir species, and it promotes the formation of HNO3 and thus removes nitrogen dioxide (NO2) from the gas phase.

The ozone hole plays a role in the stronger winds, but so does increasing temperature.

At a hearing before the House of Representatives Science Committee last week, John Doolittle, a Republican from California, said that research implicating CFCs in the destruction of ozone is «very much open to debate», and there is «no established consensus» on the role of CFCs.

In the high atmosphere, ozone plays a crucial role in shielding the surface from harmful levels of ultraviolet lighIn the high atmosphere, ozone plays a crucial role in shielding the surface from harmful levels of ultraviolet lighin shielding the surface from harmful levels of ultraviolet light.

Thompson and Solomon compared the timing of the changing patterns in the two layers of the atmosphere and found a strong correlation, suggesting that Antarctic ozone depletion has played an important role in driving the continent's climatic variability.

The role of carbon dioxide in depleting ozone was worked out in 1988, shortly after scientists identified the cause of the Antarctic ozone hole.

What makes these figures significant is the increasing evidence that nitrogen oxides (NOx) and water vapour in these emissions play a key role in destroying ozone.

The study finds that titanium dioxide coatings, seen as promising for their role in breaking down airborne pollutants on contact, are likely in real - world conditions to convert abundant ammonia to nitrogen oxide, the key precursor of harmful ozone pollution.

It's formula is C21H27FO6, making it a hydrofluorocarbon — a category of compounds perhaps best known for replacing chlorofluorocarbons (CFCs) when their role in the destruction of the ozone layer was discovered.

Shiraiwa, M., Sosedova, Y., Rouvière, A., Yang, H, Zhang, Y., Abbatt, J. P. D., Ammann, M., and Pöschl, U.: The role of longlived reactive oxygen intermediates in the reaction of ozone with aerosol particles, Nature Chemistry, 3, 291 - 295, 2011.

Berkemeier, T., S.S. Steimer, U. K. Krieger, T. Peter, U. Pöschl, M. Ammann, and M. Shiraiwa: Ozone uptake on glassy, semi-solid and liquid organic matter and the role of reactive oxygen intermediates in atmospheric aerosol chemistry, Physical Chemistry Chemical Physics 18 (18), 12662 - 12674, 2016.

This is in accord with physical expectations and most model results, which demonstrate the role of increasing greenhouse gases in tropospheric warming and stratospheric cooling; ozone depletion also contributes substantially to stratospheric cooling.

The Montreal Protocol had no impact on cleaning the air, it stopped the growth of CFCs which are powerful greenhouse gases (in addition to their role in depleting stratospheric ozone), therefore it slowed global warming, rather than increasing it, and we aren't trying to save ground - level ozone.

Note that ozone depletion has only a minor role in greenhouse warming though the two processes often are confused in the media.

As the body's largest organ, skin plays a crucial role in protecting against oxidative stressors, such as ultraviolet radiation, ozone and chemicals, all of which contribute to aging and disease.

Tracing the relationship of microorganisms like stromatolites and cyanobacteria to photosynthesis through to the development of the ozone layer, Rocha Pitta creates a rich visual tapestry that reinvigorates this narrative and makes it feel immediate to contemporary life, particularly as we consider our role in the continued transformation of our planet.

Wikipedia: Lovelock invented the electron capture detector, which ultimately assisted in discoveries about the persistence of CFCs and their role in stratospheric ozone depletion.

Global Warming, Ozone Holes, and Magnetic Poles «An Investigation Reexamining Brewer - Dobson Ozone Theory to Uncover the Atmospheric Role of Paramagnetic Oxygen in Recent Extreme Weather Patterns and Global Climate Change» by Harry Todd

* The role of the US in global efforts to address pollutants that are broadly dispersed across national borders, such as greenhouse gasses, persistent organic pollutants, ozone, etc...; * How they view a president's ability to influence national science policy in a way that will persist beyond their term (s), as would be necessary for example to address global climate change or enhancement of science education nationwide; * Their perspective on the relative roles that scientific knowledge, ethics, economics, and faith should play in resolving debates over embryonic stem cell research, evolution education, human population growth, etc... * What specific steps they would take to prevent the introduction of political or economic bias in the dissemination and use of scientific knowledge; * (and many more...)

To 337 (Anonymous Coward): For clarity, we are discussing the explanation that discounts a role for ozone, in which case I argue the atmosphere would warm at every level if CO2 is added.

One driver of temperatures in this region is the abundance and variability of ozone, but water vapor, volcanic aerosols, and dynamical changes such as the Quasi - Biennial Oscillation (QBO) are also significant; anthropogenic increases in other greenhouse gases such as carbon dioxide play a lesser but significant role in the lower stratosphere.

Due to the important role of ozone in driving temperature changes in the stratosphere as well as radiative forcing of surface climate, several different groups have provided databases characterizing the time - varying concentrations of this key gas that can be used to force global climate change simulations (particularly for those models that do not calculate ozone from photochemical principles).

Today — rising natural gas use plays a key role in falling emissions of carbon dioxide — even as levels of methane and ozone decline.

Ozone plays a key role in such stratospheric climate change, but other physical factors play important roles as well.

There's a pretty solid link between UV radiation and cancer, and given the ozone layer's role in blocking UV, it was the beginnings of a real problem.

Stratospheric ozone plays a dominant role in the stratospheric radiative balance.

Non-annular atmospheric circulation change induced by stratospheric ozone depletion and its role in the recent increase of Antarctic sea ice extent.

Ozone has played a major role in absorbing ultraviolet radiation from the sun, which would otherwise negatively impact life on earth.

Heartland has also denied pollution's role in causing acid rain and the depletion of the ozone layer, and taken strong stances against the Endangered Species Act and president Obama's healthcare reform.

Turner, J. et al (2009) Non-annular atmospheric circulation change induced by stratospheric ozone depletion and its role in the recent increase of Antarctic sea ice extent.

NOAA's role as a steward of the atmospheric environment has enabled it to play a central role in enhancing our understanding of the ozone layer and ozone layer depletion, and in gauging the effectiveness of measures taken to restore the ozone layer to its original strength.

Coming in at $ 5,000 a month is Idso's principal partner in the regular IPCC attack, Fred Singer, who for the last 20 years has denied pretty much any health threat with a corporate sponsor: the health impacts of second - hand smoke; coal's role in creating acid rain; the danger of asbestos; or DDT; the role of CFCs in creating the ozone hole; and, of course, the human cause and potential consequences of climate change.

Sceptical scientists and climate realists, contest natural variation; solar magnetic effects, volcanic eruptions, solar irradiance, ozone depletion, ocean currents PDO / AMO, clouds, all play a much more significant role in the climate system.

We note that our interpretation that SSTs have played a role in forcing Antarctic climate change is not necessarily at odds with interpretations that focus on the role of stratospheric ozone depletion (e.g. Thompson and Solomon 2002; Perlwitz et al. 2008; Son et al. 2009).

He engaged in a fiery exchange with EPA administrator Stephen Johnson over the White House's role in denying California a waiver for higher tailpipe emissions standards and weakening ozone standards.

From ozone depleting substances to super greenhouse destroying gases, refrigeration practices have played a huge role in undermining the health of our climate.

Also changes in levels of oxygen should affect levels of ozone that is the main greenhouse gas in the stratosphere and is thought to have a very important role in climate.

«An Investigation Reexamining Brewer - Dobson Ozone Theory to Uncover the Atmospheric Role of Paramagnetic Oxygen in Recent Extreme Weather Patterns and Global Climate Change» by Harry Todd

The role of stratospheric ozone in modulating the solar radiative forcing of climate.

The ozone layer may have been fixed, yet the role of evil corporations finding alternatives to CFCs does not get a mention in Monbiot's tale of goodies and baddies.

It also plays an important role in the destruction of the stratospheric ozone layer which protects us from the harmful ultraviolet rays of the sun.

This paper by Sean Davis and others presents water vapour and ozone intercomparisons that were performed as part of the SPARC (Stratosphere - troposphere Processes and their Role in Climate) Reanalysis Intercomparison Project (S - RIP).