Sentences with phrase «high ozone concentrations»

However, the crop losses associated with high ozone concentrations will be significant.

The full set of health metrics have been detailed in TOAR - Metrics, and are organised according to the range of the ozone distribution to which they correspond, specifically: high ozone concentrations, high and mid-level ozone concentrations and ozone concentrations from across the distribution.

High ozone concentrations typically occur outside of the cities and represent a risk factor for the health of rural population as well as for agricultural production.

# 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 concentrations.

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.

«The direct health effects caused by higher ozone concentration include irritation of mucous membranes, respiratory reactions such as reduced lung functions, cardiovascular diseases, as well as an impaired physical performance,» according to Umweltbundesamt.

Not exact matches

Simulations that don't include the effect of CH2Cl2 suggest that high - altitude ozone in the Antarctic will return to pre-1980 levels, the concentration measured before CFCs and other ozone - destroying chemicals were recognized as a problem, in 2065.

Those who were exposed to the highest concentrations of ozone were about 20 percent more likely to develop diabetes, even after adjusting for other possible explanations such as diet and exercise levels.

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.

The «cloud» is a three - dimensional representation of where the concentration of ozone is a high 0.14 parts per million.

Normally ozone concentrations in this part of the atmosphere are three to ten times higher.

Sunbelt cities like Los Angeles, Riverside, Calif., and Houston, with their seemingly endless sunny days, gridlocked urban sprawl and heat - trapping stagnant air masses, contain the highest average concentrations of ozone, according to a 2009 study by University of California, Berkeley scientists.

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.

Gary Cohen, president and founder of the Massachusetts - based nonprofit Health Care Without Harm, said in a telephone interview that the risks of climate change to both the health of U.S. citizens and the U.S. health care delivery system is profound, particularly in urban areas, where warming average temperatures are exacerbated by the heat island effect and high concentrations of other air pollution like ozone and particulate matter.

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.

For O3, the design value represents the three - year average of the fourth highest daily 8 - hour maximum ozone concentration.

The data showed that high traffic intensity, ozone exposure and 8 - iso concentration increased the risk of current asthma.

Increased incidence of cardio - respiratory diseases caused by higher concentrations of ground - level ozone (smog) is projected.

Modeling studies caution that warmer days will lead to higher concentrations of ground - level ozone and smog, which cause sickness and death from respiratory and cardiac disease (79).

• increases in malnutrition and consequent disorders, with implications for child growth and development; • increased deaths, disease and injury due to heat waves, floods, storms, fires and droughts; • the increased burden of diarrheal disease; • the increased frequency of cardio - respiratory diseases due to higher concentrations of ground - level ozone related to climate change; and, • the altered spatial distribution of some infectious disease vectors.

Ozone detonates at concentrations higher than 0.12 bar regardless of temperatures....

The team's results show that human - induced (anthropogenic) changes in well - mixed greenhouse gases, which are fairly evenly distributed in the atmosphere, and ozone, a greenhouse gas that is found in higher concentrations in the stratosphere, are the primary causes of the approximately 200 - meter rise in the tropopause that has occurred since 1979.

The Imperial College London researchers cautioned that even plants that can take advantage of higher CO2 levels could be harmed by other climate change impacts, such as increased temperature and ozone concentration.

Other effects include an altered burden of water - borne diseases; an increased frequency of cardio - respiratory illness due to higher concentrations of ground level ozone, and the movement of some infectious disease carriers into new regions.

«The increased risk of ozone damage to vegetation is mainly due to rising ozone concentrations and higher temperatures in the future,» says Jenny Klingberg at the University of Gothenburg's Department of Plant and Environmental Sciences.

Klingberg said: «The results show that the risk of ozone damage to plants is greatest in central Europe where ozone concentrations are high and climatic conditions promote uptake of ozone through the stomata.

Heat, flood and drought - related mortality and morbidity may increase; changes in the distribution of plant species and animals are likely to contribute to changing ranges of infectious diseases and allergic disorders; higher concentrations of ground - level ozone and particulate matter in urban areas may increase the frequency of cardio - respiratory and cardio - vascular diseases.

«What our study shows is that observed water vapor concentrations are high enough and temperatures are low enough over the U.S. in summertime to initiate the chemistry that is known to lead to ozone losses,» said Harvard atmospheric scientist David Wilmouth, one of the paper's co-authors, in an email.

* 20 to 30 % of plant and animal species likely to be at increased risk of extinction * many millions more people than today projected to experience floods every year due to sea level rise * increases in malnutrition; increased deaths, diseases and injury due to extreme weather events; increased burden of diarrhoeal diseases; increased frequency of cardio - respiratory diseases due to higher concentrations of ground - level ozone in urban areas * hundreds of millions of people exposed to increased water stress

«increases in malnutrition; increased deaths, diseases and injury due to extreme weather events; increased burden of diarrhoeal diseases; increased frequency of cardio - respiratory diseases due to higher concentrations of ground - level ozone in urban areas»

During extreme heat events, nighttime temperatures in the region's big cities are generally several degrees higher28 than surrounding regions, leading to increased heat - related death among those less able to recover from the heat of the day.36 Since the hottest days in the Northeast are often associated with high concentrations of ground - level ozone and other pollutants, 37 the combination of heat stress and poor air quality can pose a major health risk to vulnerable groups: young children, the elderly, and those with pre-existing health conditions including asthma.29 Vulnerability is further increased as key infrastructure, including electricity for potentially life - saving air conditioning, is more likely to fail precisely when it is most needed — when demand exceeds available supply.

Also, the CRS reports, ozone concentrations as high as those in Los Angeles, the nation's smoggiest city, have been found near oil and gas fields — during winter — in rural areas of Wyoming, Utah and Colorado.

Near the ground, ozone can affect human health; in high concentrations it is even toxic.

However, when nitrogen oxides are present in high concentrations as a result of human - caused pollution, VOCs react with these pollutants to produce more ozone and methane.

Not surprisingly, highly populated regions such as the Los Angeles, Riverside and Houston areas, where the climate is sunny for much of the year and the air mass is relatively stable, had the highest average concentrations of ozone, ranging from 62.5 to 104 ppb.

High ozone levels downstream of pollution sources can cause elevated OH radical concentrations, which in turn increases the concentration of condensable species and thus the potential for nucleation.

Peak ozone is an episodic problem with the highest concentrations observed during high energy demand periods.