Sentences with phrase «ozone concentrations on»

Not exact matches

What happens to the ozone layer in the second half of the 21st century will largely depend on concentrations of CO2, methane and nitrous oxide — the three main long - lived greenhouse gases in the atmosphere.

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 allergen.

Scientists from NASA and NOAA have been monitoring the ozone layer and the concentrations of ozone - depleting substances and their breakdown products from the ground and with a variety of instruments on satellites and balloons since the 1970s.

Despite the continuing evidence of the growing contribution of vehicle pollution to global warming, acid rain and ground level concentrations of ozone, there is scant sign of concerted thinking on what should be done.

In addition, he says, since CFCs are not particularly soluble in water, they would not be present in cloud - born ice particles in very high concentrations, so the mechanism Lu and Sanche propose would not dissociate enough CFCs to have a big impact on ozone levels.

Larsen and her colleagues found that ozone concentrations were on average 11.1 percent higher on days when plumes were seen than on clear days.

Pallas is one of the sites of the Finnish network for monitoring the concentrations of mercury and other heavy metals, benzo (a) pyrene, ozone and other air pollutants, as required by the European legislation on ambient air quality.

But then the other thing going on is those same protons run to the closing isobars of the earth EMF away from the tropics, and there reduce ozone, and create over time a concentration of ozone over the tropics, thereby increasing the intensity of the ITCZ and increasing tropical storm probabilities, as the wind then wanes under 500.

# 157, Alastair, I am not keen on Tropopause heights because they cause a warming below, it is rather tropopause heights are higher because it is warmer below, there is also tropopause inversions triggered by higher Ozone concentrations, at the point where the tropopause starts you will invariably find the beginning of much higher ozone concentratOzone concentrations, at the point where the tropopause starts you will invariably find the beginning of much higher ozone concentratozone concentrations.

These maps show the state of the ozone hole each year on the day of maximum depth — the day the lowest ozone concentrations were measured.

Although concentrations should level off as the Montreal Protocol on Substances which Deplete the Ozone Layer is implemented, CFCs have long life - times, and their effects will be felt for many decades to come.

Pallas is one of the sites of the Finnish network for monitoring the concentrations of mercury and other heavy metals, benzo (a) pyrene, ozone and other air pollutants, as required by the European legislation on ambient air quality.

They indicate that higher ozone concentrations, even at levels below current air quality standards in most of the world, have significant negative effects on worker productivity.

They find that variation in ozone concentrations at levels well below federal air quality standards have a significant impact on productivity.

Tagaris, E., K. Manomaiphiboon, K. J. Liao, L. R. Leung, J. H. Woo, S. He, P. Amar, and A. G. Russell, 2007: Impacts of global climate change and emissions on regional ozone and fine particulate matter concentrations over the United States.

Using data on the productivity of agricultural workers, along with information about environmental conditions that come from the California air monitoring network, they analyze the relationship between ozone concentrations during the typical workday and farm worker productivity.

Impacts of global climate change and emissions on regional ozone and fine particulate matter concentrations over the United States

Variation in ozone concentrations at ozone levels well below federal air quality standards have a significant impact on productivity.

In The Impact of Pollution on Worker Productivity (NBER Working Paper No. 17004), authors Joshua Graff Zivin and Matthew Neidell instead ask whether reductions in ambient ozone concentrations can add to human capital and therefore enhance productivity.

Though there are critiques of the science behind the evidence of harm from ozone concentrations of ~ 75 parts per billion, I'd like to focus on an outcome of the ozone tightening that the NYT implies is nothing but an industry talking point:

-- 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.

The change in total solar irradiance over recent 11 - year sunspot cycles amounts to < 0.1 %, but greater changes at ultraviolet wavelengths may have substantial impacts on stratospheric ozone concentrations, thereby altering both stratospheric and tropospheric circulation patterns... This model prediction is supported by paleoclimatic proxy reconstructions over the past millennium.

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.

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.

The harmonization of the well - mixed GHGs (CO2, CH4, N2O, eight HFCs, three PFCs, SF6 and sixteen ozone depleting substances controlled under the Montreal Protocol) was based on historical emission and observed concentration data.

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.

Giovanis, Eleftherios (2014): Evaluation of Ozone Smog Alerts on Actual Ozone Concentrations: A Case study in North Carolina.

Abstract — We investigated the effects of elevated ozone concentration (E-O3) on CH4 and N2O emission from paddies with two rice cultivars: an inbred Indica cultivar Yangdao 6 (YD6) and a...

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.

Langmann, B., and S.E. Bauer, 2002: On the importance of reliable background concentrations of ozone for regional scale photochemical modelling.

Your preference for the CFC explanation instead is bizarre because you have no idea of the scale of the effect of the positive AO on ozone concentrations.

The caveat is that these molecules can weakly absorb sunlight in the near IR and visible on combination and overtone bands, mostly of water vapor, and on weakly absorbing forbidden transitions such as the Chappius bands of ozone, and for very low concentrations of dimers.

-- ozone is a strong driver of stratospheric temperature variations and ozone concentrations are not constant — the variation of the stratospheric temperature is different on different altitudes — in the 60 - 80 the tropospheric temperatures went down but the stratospheric temperatures didn't go up.

Ku, W. Solecki, J. Cox, C. Small, C. Rosenzweig, R. Goldberg, K. Knowlton, and P. Kinney, 2007: Estimating the effects of increased urbanization on surface meteorology and ozone concentrations in the New York City metropolitan region.

Since a large body of evidence links pollution with poor health, and health is an important part of human capital, efforts to reduce pollution could plausibly be viewed as an investment in human capital and thus a tool for promoting economic growth... We find robust evidence that ozone levels well below federal air quality standards have a significant impact on productivity: a 10 ppb decrease in ozone concentrations increases worker productivity by 4.2 percent.