Sentences with phrase «aircraft emissions at»

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.

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.»

Not exact matches

The first full day of MAMM flying kicked off at 9 am local time, as the FAAM Atmospheric Research Aircraft (ARA) took to the skies to begin the morning's measurements of wetland emissions.

About 15 per cent of emissions from all civil flights come from these aircraft, and at least half their emissions issue straight into the stratosphere.

Following a request from the International Civil Aviation Organization (ICAO) to assess the consequences of greenhouse gas emissions from aircraft engines, the IPCC at its Twelfth Session (Mexico City.

Long and Iles (1997) point to the US Department of Transportation's Climatic Impact Assessment Program (aimed not at the greenhouse effect but aircraft emissions) for producing, in 1975, «the first assessment to focus on social and economic measures,» (p. 6) and the 1989 US Environmental Protection Agency study as «the first extensive appearance of an economic analysis of impacts.»

Aircraft not only emit 12 percent of CO2 emissions from U.S. transportation sources — they also emit nitrogen oxides other than nitrous oxide, causing warming when emitted at high elevation.

Aircraft operations can be optimized for energy use (with minimum CO2 emissions) by minimizing taxiing time, flying at optimal cruise altitudes, flying minimum - distance great - circle routes, and minimizing holding and stacking around airports.

We compare aircraft observations to modeled CH4 distributions by accounting for a) transport using the Stochastic Time - Inverted Lagrangian Transport (STILT) model driven by Weather Research and Forecasting (WRF) meteorology, b) emissions from inventories such as EDGAR and ones constructed from California - specific state and county databases, each gridded to 0.1 ° x 0.1 ° resolution, and c) spatially and temporally evolving boundary conditions such as GEOS - Chem and a NOAA aircraft profile measurement derived curtain imposed at the edge of the WRF domain.

Most scientific studies track methane in one of two ways: either by measuring the gas in the atmosphere with instruments placed on tall towers or flown on aircraft, or by analyzing emissions directly at the source, such as at oil and gas wells.

This is consistent with ICAO's push to cap global emissions of civil aircraft at 2020 levels, as specified in its Carbon Offsetting and Reduction Scheme for International Aviation (CORSIA), that requires offsets for every year that an airline operator exceeds emissions from 2019 - 2020 levels.

A coalition of environmental groups have been pushing the EPA to regulate greenhouse gas emissions from domestic and foreign aircraft that land at U.S. airports since 2007, and have been struggling, since then, to compel the agency to take action.

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.»

Globally, aircraft - related emissions are projected to rise at an alarming rate: about 3 to 4 percent annually, meaning they could quadruple by midcentury.

As both the House and the Senate grapple with proposed carbon - cutting measures — carbon taxes and «cap - and - trade» schemes for big CO2 emitters such as coal - fired power plants; increased Corporate Average Fuel Economy (CAFE) standards for cars, SUVs, and trucks; and mandatory set - asides for clean renewable energy in the mix of energy generation options — emissions from aircraft seem, at least for the time being, to have gone over the heads of most policymakers engaged in the rush to cut carbon emissions.

All emissions permits to be sold to airlines at auction rather than given out for free; A multiplier of at least two, to be used to compensate for the additional impacts of emissions from aircraft at altitude;

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.

Indeed, «even though 90 % of aircraft fuel is burned at cruise altitudes, only the pollutants that are emitted during takeoff and landing are regulated by measuring emissions during tests.»

The EPA has found that communities living near airports, children attending school near airports, and airplane pilots, student - trainees, and passengers are all at risk of exposure to lead emissions from these aircraft.

Sampling tubing and instrumentation control cables laid out on the pavement beside NASA's DC - 8 flying laboratory in between synthetic fuels emission and engine performance tests at the Dryden Aircraft Operations Facility in Palmdale, Calif..

Aircraft wings which redirect air to waggle sideways over their surfaces could significantly reduce drag and thus cut fuel consumption and emissions by 20 %, according to researchers at the University of Warwick (UK).

# 2: Continental Airlines, Houston, TX — «Besides spending more than $ 16 billion over the past ten years to replace its fleet with more efficient aircraft, it installed fuel - saving winglets that reduce emissions by up to 5 % on most of its Boeing 737s and 757s, and reduced the nitrogen oxide output from ground equipment at its Houston hub by over 75 % since 2000.»

He has served as Project Manager in the European Community AERONOX program, as a member of the U.S. National Academy of Sciences / National Research Council Panel on Atmospheric Effects of Stratospheric Aircraft, as Chairman of ICAO / CAEP / WG3 (emissions) Technology and Certification Subgroup, and as lead author in the World Meteorological Organization's Scientific Assessment of Ozone Depletion (1994)-RRB- David J. Griggs (Head of the IPCC Working Group I Technical Support Unit at the Hadley Centre, UK Meteorological Office), David J. Dokken (Project Administrator of the IPCC Working Group II Technical Support Unit, Washington, DC, USA) and Mack McFarland (Principal Scientist in Environmental Programs at DuPont Fluoroproducts, Wilmington, DE, USA).