Sentences with phrase «aircraft emissions»

The real issue — global warming caused by aircraft emissions — calls on us to act.

If successful, these groundbreaking guidelines would dramatically reduce aircraft emissions.

Governments and the aviation industry have welcomed new proposed aircraft emissions standards - which rather suggests that the new rules don't go far enough.

You spend years trying to get people to take an interest in aircraft emissions.

Also noted here is the potential role of aviation aerosols in altering the properties of clouds that form later in air containing aircraft emissions.

Politicians in Europe are already pushing for taxes and emissions limits on the commercial airline industry but, researchers explain, a more precise understanding of the effects of aircraft emissions on the atmosphere are necessary if such plans are to be effective.

Due to the altitude and region of the atmosphere at which aircraft emissions at cruise are deposited, the extent of transboundary air pollution is particularly strong.

The EPA had been under pressure from environmental groups who first petitioned it to regulate aircraft emissions under the Clean Air Act in 2007 and sued it in 2010.

A federal court in 2011 said the EPA must address aircraft emissions under the U.S. Clean Air Act.

Rapid estimation of global civil aircraft emissions with uncertainty quantification.

8 In fact, a 2009 Stanford University study claims that clouds created by aircraft emissions triggered an overall rise in surface temperatures of 0.03 to 0.06 degree Celsius worldwide.

Finding a solution will not be easy, not least because in the troposphere aircraft emissions can act as greenhouse gases.

NASA and the European Union are now funding research on subsonic aircraft emissions, in an attempt to improve models of how they react in the atmosphere.

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

Industry expansion plans could see aircraft emissions increase three or fourfold by 2040, says Annie Petsonk of the Environmental Defense Fund in Washington DC.

Aviation and Climate Change: Aircraft Emissions Expected to Grow, but Technological and Operational Improvements and Government Policies Can Help Control Emissions (PDF 1.73 mb)

The move comes because the company has made big inroads into its original target by cutting aircraft emissions intensity by 13.8 % efficiency and improving vehicle fuel efficiency by 16.6 % up until the end of the 2011 financial year.

Aircraft emissions used a time changing pattern from the QUANTIFY B2i emissions scenario (Lee et al. 2010), as the overall pathway for this scenario closely matched the GCAM model output.

These inventories consist of calculated aircraft emissions distributed over the world's airspace by latitude, longitude, and altitude.

Now that it's finally gotten started, the EPA's first step will be to issue an «endangerment finding,» to be proposed in April 2015 and finalized a year later, that will determine whether aircraft emissions threaten human health.

This exclusion is ridiculous, not least because aircraft emissions have a particular role in heating the planet, due to the height at which they are released, and the multiplying impacts of the water vapour and other gases the planes produce.

Every time I read about aircraft emissions adding to the CO2 in the atmosphere I never see any reference to the contrails which reflected sunlight.

Of course the graph doesn't show the true picture; as Mike has noted earlier, people travel much longer distances by plane, and there is the «radiative forcing ratio» where the warming effect from aircraft emissions are more dire than carbon dioxide emissions at grade.

Check out these reports: Oxford University: Calculating the Environmental Impact of Aviation Emissions Max Planck Institute for Meteorology: Climate forcing of aviation emissions in high altitudes and comparison of metrics Aircraft Emissions: Contributions of Different Climate Components to Changes in Radiative Forcing

Their results are unsettling but also provide new insight into the delicate physics of the atmosphere.Using emissions data from 2004 and 2006, the research team was able to determine that commercial aircraft emissions were responsible for between four and eight percent of total surface warming since records began in 1850.

ICAO guidelines should be stricter and lay out a more formal strategy for individual nations, airline operators, and aircraft manufactures to collaborate in this venture of reducing aircraft emissions.

This study research provides the first estimate of premature deaths attributable to aircraft emissions at cruise altitudes; current regulatory practice is to account only for landing and takeoff cycle (LTO) emissions — conventionally up to an altitude of 3000 ft or approximately 1 km.»

Regulating aircraft emissions is part of the Obama administration's goal under the Paris Climate Agreement to reduce U.S. greenhouse gas emissions by up to 28 percent below 2005 levels by 2025.

«As aviation is a global industry... it is critical that aircraft emissions standards continue to be agreed at the international level,» said Vaughn Jennings, managing director for government and regulatory communications for U.S. airline lobby group Airlines for America.

Parametric uncertainties in aircraft emissions and concentration - response functions are propagated throughout the analysis, along with estimates of modeling uncertainty.

Whilst aviation has been demonised by environmentalists (myself included) in the past because of the climate - change impact of aircraft emissions, in terms of fuel efficiency per passenger kilometre the latest large aircraft like the Airbus A320 and the Boeing 787 now compare favourably with small family cars.

Aircraft emissions are known to be particularly pollutant.

Experts predict that aircraft emissions, on their current trajectory, will triple by 2050 as demand for flights increases.

Aircraft emissions are expected to grow by 50 percent by 2050 as demand for air travel increases.

Robert Egli, a consultant in atmospheric chemistry from Schaff - hausen, Switzerland, argues that aircraft emissions could cause up to 8 per cent of the warming caused by greenhouse gases.

Although much of the focus has been on noise, aircraft emissions have become a topic of concern, as well.

The EPA continued to drag its feet even after a judge found, in 2011, that it was mandated to study the effects of aircraft emissions; at the beginning of August, two groups, the Center for Biological Diversity and Friends of the Earth, notified the agency of their intention to sue for a second time over its «unreasonable delay.»

Once the EPA has determined that aircraft emissions are a problem, it will be required to do something about it, by crafting and adopting emissions standards for aircraft.

UN's CORSIA and Vision for the Future of aircraft emissions won't do enough to decrease global warming.

The folks as at SAS have developed an aircraft emission calculator for all airplanes they fly.

Jacobson explained that a 20-fold decrease in black carbon emissions would completely mitigate the warming effects of aircraft emissions, and could even result in a slight cooling effect.

There are plenty of real problems with aircraft emissions.

Introducing a new generation of sustainable fuels is the next logical step in our efforts to further save fuel and reduce aircraft emissions.»

Our approach is to use a recent aircraft emissions inventory, a global chemistry - transport model, population density and disease statistics, and concentration - response functions derived from epidemiological studies to assess the impact of aircraft emissions globally on premature mortality.