Sentences with phrase «emissions sources over»

The geographical shifts of emissions sources over the past 30 years, with reductions in N.America & Europe and increases in Africa & South Asia, mean that we actually do expect the zonal aerosol forcing pattern described.

Modeled carbon isotope curves (CIEs) for 3 different emissions sources over 4 different emission timeframes.

Not exact matches

Since coal is the largest source of US emissions, the move to clamp down on the industry will go a long way toward reducing America's carbon footprint over the next two decades.

«This paper is the perfect demonstration of how new and improved satellite datasets, coupled with new and improved data analysis techniques, allow us to identify even smaller pollutant sources and to quantify these emissions over the globe.»

Methane is a greenhouse gas up to 35 times as potent as carbon dioxide as a driver of climate change over the span of a century, and landfills are the United States» third largest source of methane emissions, according to the EPA.

The jist of this is that we must NOT suddenly switch off carbon / sulphur producing industries over the planet but instead we must first dramatically reduce CO2 emissions from every conceivable source, then gradually tackle coal / fossil fuel sources to smoothly remove the soot from the air to prevent a sudden leap in average global temps which if it is indeed 2.75 C as the UNEP predicts will permanently destroy the climates ability to regulate itself and lead to catastrophic changes on the land and sea.

Household travel accounts for the vast majority (over 80 percent) of miles traveled on our nation's roadways and three - quarters of the CO2 emissions from «on - road» sources.

• The methanetrack.org website has shown significant increases in atmospheric methane concentrations over Antarctica this austral winter (which I believe are due to increases in methane emissions from the Southern Ocean seafloor due to increases in the temperature of bottom water temperatures), and if this trend continues, then the Southern Hemisphere could be a significant source of additional atmospheric methane (this century).

Of the sources of carbon dioxide emissions from the residential building sector, heating, cooling and water heating account for almost 60 percent; of commercial buildings, over 30 percent.

In addition, in Table 1 of the referenced source, only about 50 % of the estimated emissions from fossil fuels over the nearly 200 year period from 1800 to 1994 (given in petragrams Pg) is taken up by the oceans, disregarding estimated and highly uncertain source emissions from land use.

Hence, we get a strong idea of total methane emissions over all source sectors but get much less information about individual sectors.

Assuming the source was all the desertification of the Sahara (a very brave leap of faith given the HN cooling over the period), that would make the total desertification of the Sahara, a plot of land of not inconsiderable size, worth 14 years of our emissions.

Efforts to solve global warming by GHG emissions reductions strategies, rather than GHG replacement strategies, can not realistically succeed over the short - term or the long - term or any term, ever - unless the mandated reductions are so drastic that in effect they would require carbon - free alternatives for nearly all GHG sources.

None of this deals with passenger air travel which looms larger in the culture wars over energy policy that its objective significance as a source of emissions justifies.

Mr. Gates may be absolutely correct that when the arctic is warmed there results some (serious) additional warming: however, if that warming is not caused overwhelmingly by anthropogenic sources, then — at the very least — we can halt the alarmist cry over CO2 emissions and start the important work of science.

Tubman co-authored a recent C2ES report called «Leveraging Natural Gas to Reduce Greenhouse Gas Emissions,» which recognized natural gas as a short - term climate solution but called for more aggressive policies and investments to promote zero - carbon sources like renewables over the long haul.

The lawsuit claims that Allegheny undertook many construction projects over the years to extend the operational lifespan of these plants without complying with federal standards that require implementation of best available control technology standards to reduce sulfur dioxide and nitrogen oxide emissions when new sources of power are constructed.

Rice cultivation is the third largest source of methane emissions in the sector, and the top two rice producing states, Arkansas and California, are responsible for over half of U.S. emissions from rice production.

Over the long run, determining the «additionality» and global price impacts of oil recovered through EOR will be critical for determining whether CO2 EOR provides a net negative source of emissions.

The transportation sector has eclipsed power plants as the biggest source of US carbon emissions, and EPA calculated in 2010 that the tougher fuel - efficiency standards would prevent more than one year's worth of total US carbon emissions over the lifetime of new vehicles sold from 2012 through 2025.

As well as a strong deal in Paris, it needed citizens to choose public transport over cars and insulate their homes, and industry to tackle sources of greenhouse gas emissions such as power stations, transport, cement, farming and fertilisers.

Even more, according to the Environmental Projection Agency, the Meramec Coal Plant accounts for over 95 % of the fixed source greenhouse gas emissions for St. Louis County.

Coal - fired power plants would be required to curb their greenhouse gas emissions and over the long term, and utility companies that operate them would have to transition away from coal to wind, solar and other renewable energy sources.

Top - down and bottom - up estimates that use only one of these data sources often arrive at very different CH4 totals, and they extrapolate emissions over time and space in ways that are difficult to compare.

He shows, how the emission originates over a wide range of altitudes with a significant contribution from altitudes 8 - 15 km, where the amount of water is small and CO2 is the main source of emission and where the temperature is falling with altitude (Figure 2).

Shannon Fisk, an attorney for the National Resources Defense, which has joined EPA in the federal lawsuit against DTE over violating the New Source Review provisions when it upgraded its Unit 2, pointed out the MDNRE issued DTE's permit just 8 days after the end of the public comment period regarding greenhouse gas emissions.

After set - asides have been calculated, EPA proposes to allocate the remaining allowances in the state's emission budget to existing sources based on their performance over the 2010 - 2012 period.

Nuclear generation was relatively flat over the past decade but remains the single largest source of generation without CO2 emissions.

And as said before, the ice cores measurements at one side and the emissions estimates for the period 1900 - 1960 indicates that nature was a net sink over that period, be it that in some years nature might have been a source, in other years a sink.

If the propaganda and articles generated by the industry are any indication there is serious concern by fossil fuel users over any attempts to impose limits on mercury emissions from coal burning sources.

FE in # 145: «What we know quite exactly is the difference between natural sources and sinks at the end of the year: a net sink over the past 50 years at about half the height of human emissions.

In this analysis we look into how the more ambitious RES (renewable energy sources) target for 2030 will imply a more rapid phase - out of coal, how this will affect power sector emissions over the next decade, and how this could impact carbon prices.

It may tell them something about how the Earth behaves climatically over long periods, which would be great (although if you take a long enough view we're all going to bake or sink anyway), but it certainly doesn't mean we don't need to cut emissions, carbon or otherwise, combat overfarming, deforestation and salination, come up with alternative energy sources good and fast and start in on the synthetic food.

Given that the effect of human emission (positive flux) and remediation (negative flux) is distributed over the entire planet and multiple years, small differences in spacial location or time within the year will make no more difference than differences in the larger natural sources and sinks.

The new rule aims to cut carbon dioxide emissions from power plants — the nation's largest source of carbon pollution — 32 percent from 2005 levels over the next 15 years.

Thousands of years ago, during the height of the ancient Greek and Roman empires, lead emissions from sources such as the mining and smelting of lead - silver ores in Europe drifted with the winds over the ocean to Greenland — a distance of more than 2800 miles (4600 km)- and settled onto the ice.

The red line with yellow range represents the warming to come over the next 90 years in one of the more moderate IPCC business - as - usual emissions scenarios (A1B - rapid global economic growth with a balanced emphasis on all energy sources).

The company expects energy demand to grow at an average of about 1 % annually over the next three decades — faster than population but much slower than the global economy — with increasing efficiency and a gradual shift toward lower - emission energy sources: Gas increases faster than oil and by more BTUs in total, while coal grows for a while longer but then shrinks back to current levels.

The reason is that after clicking on links from that page, I came across your «source», except that it didn't show OLR over the entire thermal IR spectrum of Earth's emissions, but only in a window region.

We have been working in partnership with The Co-operative for over twelve years, developing and sourcing projects which reduce carbon emissions and support sustainable development.

When all sources of black carbon emissions from diesel fuel combustion are considered, including farming and construction equipment, trains and ships, the reduction in carbon dioxide emissions can be as high as 50 million metric tons per year over the past 20 years.

The results confirm that wetlands are the primary source of summer methane emissions over Fennoscandia.

Do these models also predict the current nine years of cooling or when the 2ppmv annual increase in CO2 concentrarion will once again cause catastropic global warming as predicted by the models in the IPCC 2001TAR which predicted the non existant warming from human sourced CO2 emissions over the past ten years that never happened?

about Comprehensive study of emission source contributions for tropospheric ozone formation over East Asia

While fossil fuels will account for most of the increased energy supply, renewable sources of energy will also gain importance, as a result of concerns over high fossil fuel prices, increasing greenhouse gas emissions and energy import dependence.

While fossil fuels will remain an important source of energy, renewable energies will also gain importance, as a result of concerns over high fossil fuel prices, increasing greenhouse gas emissions and energy import dependence.

Over the summer and fall of 2006, Vessels monitored the existing air shaft and wells from the old mine to confirm that the mine was a net source of methane emissions to the atmosphere.

Reversal of degradation has the potential to not only reverse the 25 % of greenhouse gas emissions from this source — but to return another 25 % of current emissions to soil and vegetation over 40 years.

Emissions from all fuel sources have grown in the African region over time with liquid and solid fuels now each accounting for approximately 35 per cent and gas fuels accounting for 17 per cent of the regional total.

First, wind blowing over uncovered coal stockpiles results in fugitive coal dust emissions that are a source of PM2.5.