Sentences with phrase «in atmospheric emissions»

Increased generation from Victoria's brown coal plants with their relatively low thermal efficiencies has also lowered the average national thermal efficiency of power generation, leading to a corresponding rise in atmospheric emissions.

Not exact matches

VW acknowledges that it installed a cheating algorithm in each car that takes in reams of data — about atmospheric pressure, how the car was being steered, how fast it was going and how far — then determines whether the vehicle is being tested by regulators or driven in the real world, applying emissions controls accordingly.

There is a current and lively argument in our own Congress, with California's Senator Boxer leading the charge for a bill to cut our emissions sharply, even as she prepares to fly to Bali and contribute some atmospheric pollution as she flies.

However, newer research has shown that GHG emissions such as atmospheric methane have risen rapidly since 2007, according to a 2016 study published in the International Journal of Science.

Damon Matthews of Concordia University in Montreal, Canada, and his colleagues calculated national contributions to warming by weighting each type of emission according to the atmospheric lifetime of the temperature change it causes.

Worldwide, carbon storage has the capability to provide more than 15 percent of the emissions reductions needed to limit the rise in atmospheric CO2 to 450 parts per million by 2050, an oft - cited target associated with a roughly 50 - percent chance of keeping global warming below 2 degrees, but that would involve 3,200 projects sequestering some 150 gigatons of CO2, says Juho Lipponen, who heads the CCS unit of the International Energy Agency in Paris.

«Stabilizing or reducing atmospheric carbon dioxide concentrations, therefore, requires very deep reductions in future emissions to compensate for past emissions that are still circulating in the Earth system,» the draft report says.

«We now have an independent measurement of these emission sources that does not rely on what was known or thought known,» said Chris McLinden, an atmospheric scientist with Environment and Climate Change Canada in Toronto and lead author of the study published this week in Nature Geosciences.

The Science study finds that this is most likely because the models underestimate the atmospheric warming in the Arctic that is induced by a given carbon - dioxide emission.

This image from the Interface Region Imaging Spectrograph (IRIS) shows emission from hot plasma (T ~ 80,000 - 100,000 K) in the Sun's transition region — the atmospheric layer between the surface and the outer corona.

«You might expect air quality would decline if ammonia emissions go up, but this shows it won't happen, provided the emissions from combustion go down,» said Fabien Paulot, an atmospheric chemist with Princeton University and the National Oceanic and Atmospheric Administration who was not involved in the study.

«It's one of the clearest examples of how humans are actually changing the intensity of storm processes on Earth through the emission of particulates from combustion,» said Joel Thornton, an atmospheric scientist at the University of Washington in Seattle and lead author of the new study in Geophysical Research Letters, a journal of the American Geophysical Union.

«As the Clean Air Act and amendments have taken effect there has been a reduction in sulfur emissions from coal combustion, so that the amount of atmospheric sulfur deposited each year is only 25 percent of what it used to be.

This has led to a large decrease in sulfur emissions, and less atmospheric deposition of sulfate to agricultural fields, and consequently, declining sulfate concentrations in rivers.

Of course, the extra heat trapped by human greenhouse gas emissions is likely to play a bigger role than raindrop friction in any atmospheric changes.

Environmentalists, many of whom believe that the term «clean coal» is an oxymoron, nonetheless view the project's cancellation as yet another indication that the Bush administration lacks the commitment required to reduce the rate of growth in atmospheric carbon dioxide emissions.

«There is a danger in believing that land carbon sinks can solve the problem of atmospheric carbon emissions because this legitimises the ongoing use of fossil fuels,» Professor Mackey said.

A curious detail also shown by the study is a reduction in atmospheric pollution from lead during the last few decades, which, as Lozano concludes, «suggests that the global measures taken to reduce lead emissions, such as the use of lead - free gasoline, have helped to reduce the levels of this metal in the atmosphere.»

Saikawa, a specialist in atmospheric chemistry, is also studying levels of black carbon emissions in the outdoor environment generated by the burning of biomass fuels like yak dung.

Ronald Cohen, an atmospheric scientist at the University of California, Berkeley who was not part of the research, calls the new study «provocative,» and says it shows agricultural fertilizer contributes a significant fraction of total NOx emissions in California.

Certainly, the only way to stop the massive increase in atmospheric carbon dioxide is to impose a charge, either on emissions or fuel, and to allow competition to provide the cheapest alternative.

What is more, because Jupiter's microwave emissions vary in wavelength based on the pressure (as well as temperature) of the atmospheric layers where they originate, observations at multiple wavelengths allow researchers to create a cross-section through the atmosphere.

A surprising recent rise in atmospheric methane likely stems from wetland emissions, suggesting that much more of the potent greenhouse gas will be pumped into the atmosphere as northern wetlands continue to thaw and tropical ones to warm, according to a new international study led by a University of Guelph researcher.

The researchers find that «ocean - driven melt is an important driver of Antarctic ice shelf retreat where warm water is in contact with shelves, but in high greenhouse - gas emissions scenarios, atmospheric warming soon overtakes the ocean as the dominant driver of Antarctic ice loss.»

Elevated mercury emissions also coincided with previously established increases in atmospheric CO2 concentrations, indicating CO2 release from volcanic degassing.

The inset map is a computer model of Asian mercury emissions across the Pacific Ocean at an altitude of 20,000 feet in April 2004, while atmospheric chemist Dan Jaffe was picking up significant mercury readings on Mount Bachelor (the highest concentrations are in red).

Non-polar glacial ice holds a wealth of information about past changes in climate, the environment and especially atmospheric composition, such as variations in temperature, atmospheric concentrations of greenhouse gases and emissions of natural aerosols or human - made pollutants... The glaciers therefore hold the memory of former climates and help to predict future environmental changes.

In the new paper, published in the journal Environmental Research Letters, Höglund - Isaksson estimated global methane emissions from oil and gas systems in over 100 countries over a 32 - year period, using a variety of country - specific data ranging from reported volumes of associated gas to satellite imagery that can show flaring, as well as atmospheric measurements of ethane, a gas which is released along with methane and easier to link more directly to oil and gas activitieIn the new paper, published in the journal Environmental Research Letters, Höglund - Isaksson estimated global methane emissions from oil and gas systems in over 100 countries over a 32 - year period, using a variety of country - specific data ranging from reported volumes of associated gas to satellite imagery that can show flaring, as well as atmospheric measurements of ethane, a gas which is released along with methane and easier to link more directly to oil and gas activitiein the journal Environmental Research Letters, Höglund - Isaksson estimated global methane emissions from oil and gas systems in over 100 countries over a 32 - year period, using a variety of country - specific data ranging from reported volumes of associated gas to satellite imagery that can show flaring, as well as atmospheric measurements of ethane, a gas which is released along with methane and easier to link more directly to oil and gas activitiein over 100 countries over a 32 - year period, using a variety of country - specific data ranging from reported volumes of associated gas to satellite imagery that can show flaring, as well as atmospheric measurements of ethane, a gas which is released along with methane and easier to link more directly to oil and gas activities.

«Today atmospheric carbon dioxide emissions from burning fossil fuels are implicated in climate change, and carbon sequestered in forest biomass reduces carbon dioxide in the atmosphere.

Coupled with an emissions growth rate of 3.3 percent — triple the growth rate of the 1990s — the atmospheric burden is now rising by nearly two parts per million of CO2 a year, the fastest growth rate since 1850, the international team of researchers reports in Proceedings of the National Academy of Sciences USA.

However, as the atmospheric CO2 rises — due to the almost exponential increase in emissions from industrial sources — the influence of solar variability on the Earth's climate will most likely decrease, and its relative contribution will be far surpassed by «greenhouse» gases.

As emissions from human activities increase atmospheric carbon dioxide, they, in turn, are modifying the chemical structure of global waters, making them more acidic.

The analysis, led by Scot Miller, a doctoral student in atmospheric science at Harvard University, points to underestimates in emissions from livestock and fossil fuel activities as the primary reason for the disparity.

«If we want natural gas to be the cleanest fossil fuel source, methane emissions have to be reduced,» says Gabrielle Pétron, an atmospheric scientist at NOAA and at the University of Colorado in Boulder, and first author on the study, currently in press at the Journal of Geophysical Research.

A new analysis using changes in cloud cover over the tropical Indo - Pacific Ocean showed that a weakening of a major atmospheric circulation system over the last century is due, in part, to increased greenhouse gas emissions.

«We find that variations in the UV emissions of red - dwarf stars have a potentially large impact on atmospheric biosignatures in simulations of Earth - like exoplanets.

Although the emission remains a mystery, it may arise from the fluorescence of atmospheric methane, a phenomenon witnessed in our own solar system.

Air pollutant emission inventories are essential in measuring the impact of pollution on air quality and the climate, as they are fed into atmospheric and climate models to make projections for the future.

An international team led by atmospheric chemist Qiang Zhang of Tsinghua University in Beijing looked at emissions data across 13 global regions for 2007, the last year comprehensive information was available.

Professor Sybren said: «It can be excluded, however, that this hiatus period was solely caused by changes in atmospheric forcing, either due to volcanic eruptions, more aerosols emissions in Asia, or reduced greenhouse gas emissions.

«Changes in ocean conditions that affect fish stocks, such as temperature and oxygen concentration, are strongly related to atmospheric warming and carbon emissions,» said author Thomas Frölicher, principal investigator at the Nippon Foundation - Nereus Program and senior scientist at ETH Zürich.

In a study published today in Proceedings of the National Academy of Sciences, a team led by atmospheric scientists Logan Mitchell and John Lin report that suburban sprawl increases CO2 emissions more than similar population growth in a developed urban corIn a study published today in Proceedings of the National Academy of Sciences, a team led by atmospheric scientists Logan Mitchell and John Lin report that suburban sprawl increases CO2 emissions more than similar population growth in a developed urban corin Proceedings of the National Academy of Sciences, a team led by atmospheric scientists Logan Mitchell and John Lin report that suburban sprawl increases CO2 emissions more than similar population growth in a developed urban corin a developed urban core.

Just last month, the World Meteorological Organization reported that atmospheric CO2 concentrations are still rising at an unprecedented pace, despite the plateau in emissions over the last few years (Climatewire, Oct. 31).

A recent trend in GCMs is to extend them to become Earth system models, that include such things as submodels for atmospheric chemistry or a carbon cycle model to better predict changes in carbon dioxide concentrations resulting from changes in emissions.

Here we show how a factor of three uncertainty in climate sensitivity introduces even greater uncertainty in allowable increases in atmospheric CO2 concentration and allowable CO2 emissions.

The continued increase in the atmospheric concentration of carbon dioxide due to anthropogenic emissions is predicted to lead to significant changes in climate1.

It's correct that an extra methane molecule is something like 25 times more influential than an extra CO2 molecule, although that ratio is primarily determined by the background atmospheric concentration of either gas, and GWP typically assumes that forcing is linear in emission pulse, which is not valid for very large perturbations.

«If atmospheric CO2 emissions and air temperatures continue to rise, the male god may soon never cross the lake again to visit the female god as he has in Shinto legend for centuries.»

Hi Andrew, Paper you may have, but couldn't find on «The phase relation between atmospheric carbon dioxide and global temperature» CO2 lagging temp change, which really turns the entire AGW argument on its head: http://www.sciencedirect.com/science/article/pii/S0921818112001658 Highlights: ► Changes in global atmospheric CO2 are lagging 11 — 12 months behind changes in global sea surface temperature ► Changes in atmospheric CO2 are not tracking changes in human emissions.

The preliminary results of this study have been on our website since the time the flooding happened, but now we have looked not only at the rainfall, but also the influence of anthropogenic greenhouse gas emissions on the atmospheric circulation and how this propagates from rainfall, to river flow down to the direct impact of flooded houses in the river catchment zones.