Sentences with phrase «ozone levels for»

Elisabetta Pierazzo of the Planetary Science Institute in Tucson, Arizona, and colleagues used a global climate model to study how water vapour and sea salt thrown up from an impact will affect ozone levels for years after the event.

Not exact matches

Rep. Faso Vote Record Tracking Rep. Faso in the Age of Trump fivethirtyeight.com Ozone Standards Implementation — Vote Passed (229 - 199, 5 Not Voting) The House passed the bill that would extend for eight years the deadline for the EPA to implement new National Ambient Air Quality Standards for ground - level oOzone Standards Implementation — Vote Passed (229 - 199, 5 Not Voting) The House passed the bill that would extend for eight years the deadline for the EPA to implement new National Ambient Air Quality Standards for ground - level ozoneozone.

State Attorney General Eric Schneiderman said he would sue the EPA over what he said was the agency missing a statutory deadline for designating areas of the country impacted by unhealthy levels of ground - level ozone.

State AG Eric Schneiderman, leading a coalition of 15 state attorneys general, today filed a lawsuit against the EPA and its administrator, Scott Pruitt, for failing to meet the Clean Air Act's statutory deadline for designating areas of the country impacted by unhealthy levels of ground - level ozone (commonly referred to as smog).

«To ask the Secretary of State for Transport whether he has requested a derogation from EU air quality legislation in relation to limits on the levels of pollution from (a) nitrogen dioxide, (b) ozone and (c) other nitrogen oxides.

Dr Iarla Kilbane - Dawe from the Department for Transport said: «Ozone was always going to be easy to fix; improving air quality has a whole different level of complexity».

For while NASA's satellites had been monitoring ozone levels around the world 24/7, Farman had found the hole with an ageing instrument wrapped in a quilt.

Regulations on VOCs vary by state, but most consumer products are regulated only for their potential contribution to ground - level ozone, not fine particulate matter.

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.

But it can promote the formation of ground - level ozone, which irritates the lungs and at high levels makes it dangerous for people with respiratory problems to be outside.

Press reports last weekend revealed that, locally and for short periods, ozone levels in the upper atmosphere fell during the past month to between 10 and 40 per cent below normal as far south as Shetland.

Oil and gas development has long drawn criticism for its environmental effects, which range from road - killed wildlife to unhealthy ozone levels.

Senator Tom Carper (DE), top Democrat on the panel, cited an interview in which Hartnett White suggested that low - level ozone, an air pollutant, wasn't harmful unless «you put your mouth over the tailpipe of a car for 8 hours every day.»

For example, he says, the cosmic ray effect could explain why CFC and ozone levels decline during the Antarctic winter, when ultraviolet radiation is scarce.

As well as human influences, Novelli points out that the eruption of Mount Pinatubo in June 1991 may be responsible for a recent decrease in stratospheric ozone levels.

While it has been known for over a decade that Asian pollution contributes to ozone levels in the United States, this study is one of the first to categorize the extent to which rising Asian emissions contribute to U.S. ozone, according to Lin.

Ground - level ozone, sulfur dioxide, nitrogen dioxide carbon monoxide are especially harmful for senior citizens, children, and people with heart and lung conditions such as emphysema, bronchitis, and asthma.

For all three regions, the figures for the past two winter - spring seasons are the lowest ever observed, and statistically well below the mean ozone level in these areFor all three regions, the figures for the past two winter - spring seasons are the lowest ever observed, and statistically well below the mean ozone level in these arefor the past two winter - spring seasons are the lowest ever observed, and statistically well below the mean ozone level in these areas.

For example, at 60 parts per billion ozone levels, which the U.S. Environmental Protection Agency considers a «moderate» level, the researchers found that enough chemical changes took place to thoroughly confuse bees and hinder their ability to identify the plumes of floral scents they needed to locate food.

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

Louisa Emmons, a visiting scientist at the National Center for Atmospheric Research in Boulder, Colo., and her colleagues connected a region of elevated ozone levels in the eastern Indian Ocean with lightning produced in Africa.

Ground - level ozone (a key component of smog) is associated with many health problems, such as diminished lung function, increased hospital admissions and emergency room visits for asthma, and increases in premature deaths.12, 13,14,146

The colour scale for increasing and decreasing ozone levels over time and associated p - values is the same as in Figure 8.

Consistency for surface ozone levels was more difficult to achieve due to the influence of emissions from up - wind regions.

For soybeans, the researchers found that 46 percent of damage was actually caused by increased ozone levels — and not by increased heat, as had been previously thought.

Ozone should recover to its pre-1980 levels by the middle of this century and slightly later for Antarctica where the protective gas layer gets extremely thin between August and December every year, the WMO reportedly said, adding that the process can be speeded up by almost 11 years if existing stocks of ozone - depleting products, such as those found in old refrigerators and fire extinguishers are destrOzone should recover to its pre-1980 levels by the middle of this century and slightly later for Antarctica where the protective gas layer gets extremely thin between August and December every year, the WMO reportedly said, adding that the process can be speeded up by almost 11 years if existing stocks of ozone - depleting products, such as those found in old refrigerators and fire extinguishers are destrozone - depleting products, such as those found in old refrigerators and fire extinguishers are destroyed.

And the level of ozone considered here would be typical for a major U.S. city on a hot summer day, notes Fuentes.

ACC issued the following statement in advance of today's legislative hearing entitled, «Making Implementation of the National Ambient Air Quality Standards (NAAQS) for Ground - Level Ozone Attainable.»

Long - term exposure to high levels of road traffic and ozone significantly increases the risk of asthma symptoms, asthma attacks or the need for use of asthma medications, according to a new study published in the European Respiratory Journal [1].

In a cooperative effort between Duke and Duke Kunshan University, researchers found higher exposure to ground - level ozone led to higher blood pressure and blood platelet activation — risk factors for cardiovascular health.

Technically, the Environmental Protection Agency is reducing the National Ambient Air Quality Standards (NAAQS) for ground - level ozone limits from the current level of 75 parts per billion (ppb) down to 70 ppb.

A conversation with Drew Day, research associate with the Nicholas School of the Environment at Duke University and the Duke Global Health Institute, about a new study suggesting ground ozone levels may have serious consequences for heart health.

Integrated Assessment Modelling for the Protocol to Abate Acidification, Eutrophication and Ground - level Ozone in Europe.

Simultaneous Optimization of Abatement Strategies for Ground - Level Ozone and Acidification.

Another good example is O2 (oxygen, vital for life) and O3 (ozone, toxic even at low levels).

Dear Dr. Daniel: I live in a city which has a high level of ozone and particulates, but I lived here for many years without making my asthma worse.

In a world of $ 3 a gallon gas, ever - tightening emissions regulations and an ozone layer starting to look like that map of AT&T's 3G coverage, the entry - level horsepower number for a top - line sports sedan now stands at a staggering 300.

AIR QUALITY — 2 Points — One point for parts per million of ozone and one point for levels of suspended fine particulate matter, both of which are major components of smog.

Cities earn up to two additional points for air quality, as measured by the amount of ground - level ozone and particulate matter its residents are forced to breathe.

Two additional points are awarded for air quality — one for ozone levels, and another for fine particulate matter.

• 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.

It's worth noting that most model projections suggest that the SAM trend may level off for a while as the ozone hole gradually declines, but those same model projections suggest the SAM trend will recover as CO2 continues to rise.

Should cold temperature persist for another couple weeks, ozone depletion could reach record levels for the Arctic.

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 addFor 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 addfor ozone, in which case I argue the atmosphere would warm at every level if CO2 is added.

Warming must occur below the tropopause to increase the net LW flux out of the tropopause to balance the tropopause - level forcing; there is some feedback at that point as the stratosphere is «forced» by the fraction of that increase which it absorbs, and a fraction of that is transfered back to the tropopause level — for an optically thick stratosphere that could be significant, but I think it may be minor for the Earth as it is (while CO2 optical thickness of the stratosphere alone is large near the center of the band, most of the wavelengths in which the stratosphere is not transparent have a more moderate optical thickness on the order of 1 (mainly from stratospheric water vapor; stratospheric ozone makes a contribution over a narrow wavelength band, reaching somewhat larger optical thickness than stratospheric water vapor)(in the limit of an optically thin stratosphere at most wavelengths where the stratosphere is not transparent, changes in the net flux out of the stratosphere caused by stratospheric warming or cooling will tend to be evenly split between upward at TOA and downward at the tropopause; with greater optically thickness over a larger fraction of optically - significant wavelengths, the distribution of warming or cooling within the stratosphere will affect how such a change is distributed, and it would even be possible for stratospheric adjustment to have opposite effects on the downward flux at the tropopause and the upward flux at TOA).

According to the Chinese Centre for Disease Control and Prevention, the burning of coal is responsible for 70 percent of the emissions of soot that clouds out the sun in so much of China; 85 percent of sulfur dioxide, which causes acid rain and smog; and 67 percent of nitrogen oxide, a precursor to harmful ground level ozone.

Similar negative effects occur with worsening air pollution — higher levels of ground - level ozone smog and other pollutants that increase with warmer temperatures have been directly linked with increased rates of respiratory and cardiovascular disease — food production and safety — warmer temperatures and varying rainfall patterns mess up staple crop yields and aid the migration and breeding of pests that can devastate crops — flooding — as rising sea levels make coastal areas and densely - populated river deltas more susceptible to storm surges and flooding that result from severe weather — and wildfires, which can be ancillary to increased heat waves and are also responsible for poor air quality (not to mention burning people's homes and crops).

However, there was a significant reduction on Ontario ozone levels, which was offset by increased emissions from natural gas power plants that substituted for some of the electricity from the shuttered coal - fired power plants.

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.

Pollutant gas and aerosol emissions levels in the reference scenario were checked for consistency by estimating regional surface particulate and ozone levels using the MOZART atmospheric chemistry model.