Sentences with phrase «ozone levels because»

«With our hot, dry summers, we tend to see higher ozone levels because ozone is formed with a combination of air pollution and sunlight.

Potential study limitations include being geographically confined to Baltimore and the decision to not measure indoor ozone levels because previous studies found those levels to be low indoors in the city.

Not exact matches

The Antarctic ozone hole forms and expands during the Southern Hemisphere spring (August and September) because of the high levels of chemically active forms of chlorine and bromine in the stratosphere.

Increasing levels of ozone, in turn, trap more heat, exacerbating the urban heat island effect: Cities are normally about five to 10 degrees hotter than surrounding suburbs because asphalt and cement absorb sunlight, generating a vicious cycle of escalating pollution and heat.

Ozone doesn't just live high in Earth's atmosphere; near the ground, it contributes to smog, and ground - level ozone has gradually increased in most places because of industrial pollution from vehicles and fossil - fuel burOzone doesn't just live high in Earth's atmosphere; near the ground, it contributes to smog, and ground - level ozone has gradually increased in most places because of industrial pollution from vehicles and fossil - fuel burozone has gradually increased in most places because of industrial pollution from vehicles and fossil - fuel burning.

The findings are timely because the Environmental Protection Agency is developing stricter regulations for ground - level ozone, a primary component in photochemical smog.

This is because warmer temperatures and other changes in the atmosphere related to a changing climate, including higher atmospheric levels of methane, spur chemical reactions that lead to ozone.

«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.

The ozone season is selected because it is the part of the year with highest temperatures and strongest solar radiation and thus the time when photochemical reactions of ozone precursor gases are most likely to produce high ozone levels (Rice, 2014).

NOx emissions can both increase crop growth and diminish it because NOx gases help catalyze the formation of ground - level ozone and this gas is toxic to plant life.

China and South Asia, on the other hand, will see the most ozone - related damage to wheat, rice and soybean crops because of the chronically high levels of toxic air pollution.

In addition, ground - level ozone (O3) and secondary particulate matter are often referred to among the CAC because they both are by - products of chemical reactions between the CACs that take place in the atmosphere.

Rising levels of ozone is a big and growing problem because it weakens a plant's immune system, producing brown spots on leaves.

Even though the stratosphere has an opposite lapse rate to the troposphere because of the ozone absorption, the effect of increasing GHGs is the same, i.e. since it is above the effective radiating level, it will cool.

Because ozone rapidly decreases with height (very little ozone above 35 km), ozone loss is estimated to have caused only half of the cooling at the higher levels of the stratosphere.

Crops, which tend to be situated in areas with high ozone levels, would be particularly stunted because they are fertilized.

In 1990 CO2 accounted for more than 98 % by weight of the total emissions of the five main GHGs (low - level ozone is not considered here or elsewhere in this sheet because its impacts, although large, are still difficult to quantify).

An ocean of pure chlorine at sea level would have zero effect on the ozone layer, because it can't get up there.

And ozone changes are again implicated because that level of 50Km is so close to that level of 45Km (mentioned by Joanna Haigh) where the ozone reaction seems to change.

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.

Levels of protective ozone are stabilizing because of the Montreal Protocol.

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.

A good example is the consensus of chemistry models that projected a slow decline in stratospheric ozone levels in the 1980s, but did not predict the emergence of the Antarctic ozone hole because they all lacked the equations that describe the chemistry that occurs on the surface of ice crystals in cold polar vortex conditions — an «unknown unknown» of the time.