Sentences with phrase «emissions estimates»

That is roughly 10 times the amount of all human - caused mercury emissions over the last 30 years, based on emissions estimates from 2016.
It is misleading to include the absolute biomass - related emission estimates in the totals.
Even though the hotspots only occur on about 1 percent of the area, they contribute 17 percent to the annual methane emission estimate of the study area.
Such a system of measurements can increase the reliability of national emissions estimates.
That study found emission estimates reported in a series of studies used to justify federal methane regulations may have been significantly exaggerated.
Comprehensive studies that account for both direct and indirect emissions estimate that over 50 % of global GHG emissions come from raising livestock.
A sensitivity analysis using recent emissions estimates and some more aggressive reductions would also be interesting.
The IMO's most recent study on international shipping emissions estimated they could grow between 50 % and 250 % by 2050, under current measures.
Only the growth rate in terms of coal energy content is relevant for calculating CO2 emissions, so the disagreement does not affect emission estimates.
The use of the aggregated national data means that the national emissions estimates are not broken - down at the geographic or facility level.
EIA's Emissions of Greenhouse Gases in the United States 1985 - 1990 (DOE / EIA -0573, September 1993) also assumed 99 percent combustion for carbon emission estimates.
Linda Y. Tseng, currently at Colgate University, Diego Rosso, and colleagues from the University of California, Irvine, note that when the Intergovernmental Panel on Climate Change (IPCC) estimated global carbon dioxide (CO2) emissions, the data available to the organization did not include CO2 emission estimates from wastewater, which may contain fossil sources of carbon such as petrochemicals.
Full - fuel - cycle GHG emissions estimates for reformulated gasoline pathways by LCA study.
The Arctic Monitoring and Assessment Program (AMAP) carbon assessment published in 2009 highlighted the disparity in methane emissions estimated by extrapolating data from wetlands, lakes, and coastal waters underlain by permafrost (32 to 112 Tg CH4 yr - 1) and estimates based on spatial and temporal variability of atmospheric methane concentrations (15 to 50 Tg CH4 yr - 1).
Greenhouse gas emissions estimates for electric cars will have to take into account the greenhouse gases emitted by power plants, he said.
Such heterogeneity — and ambiguity over the true estimate — confuses the consumer, undermining the credibility of emissions estimates in general.
Future emissions estimated based on OECD projections for economic growth and steady progress towards the upper (65 %) or lower (60 %) end of China's carbon intensity target for 2030.
The study applied «medium to high» future emissions estimates of heat - trapping gases, as assumed by the California state government, to models designed to assess what effect climate change would have on national parks like Yosemite, Death Valley, Redwood, Joshua Tree and Sequoia.
New shipboard direct sampling methods for air - sea CH4 exchange will enable researchers to better quantify marine fluxes and will help the community address disparities in marine CH4 emissions estimates among different regions [Thornton et al., 2016].
Global, present - day fossil fuel emission estimates range from 5.8 to 8.0 TgC yrâ $ «1 (Haywood and Boucher, 2000 and references therein).
In January, we published preliminary emissions estimates for 2017 and found that the pace of decline slowed last year.
Consequently, GHG emissions estimates do not currently appear on the front page of flight search - engine results.
Note that the IEA's emissions estimates differ somewhat from those used by the Global Carbon Project.
The global methane emissions estimates included in this report, while more detailed and robust than anything currently available, are limited by the lack of credible, up - to - date estimates for most countries.
While Miller et al.'s estimate is higher than EPA's current emissions estimate from the oil and gas sector it does suggest that the much higher emissions rates found in a couple of recent geographically specific studies are unlikely to represent mean national emissions rates, but rather important opportunities for mitigation.
Most studies have used EPA emission estimates from 1996, which were updated in November 2010 when it was determined that greenhouse gas emissions of various fuels are higher than previously believed.
From there we used government emissions estimates for subways, buses, cars, and air travel to determine that DISCOVER's staff puts out 5.4 tons of carbon dioxide getting around each month.
«If Howard's right, we'll need to review other emission estimates used in EPA inventories,» said Robert Jackson, an earth science professor at Stanford University who studies methane leaks.
All of these studies are reporting upstream emission estimates that are 10 - to 20-fold higher than those reported in this new paper by the Allen and colleagues.
(CDIAC have just published 2012 preliminary emissions estimates = 9.67 GtC.)
Therefore, these new emission estimates do not allow yet a quantification of the permafrost methane - climate feedback.
Furthermore, emissions estimates discussed here include only those from fossil fuels burned within a country's borders, meaning that the tallies do not account for international trade.
Also, the Greenland ice core data do agree pretty good with sulfate emissions estimates, but Greenland is located downwind of the US and Canada and does not represent global trends impacted by developing countries.
This is substantially larger than the ~ 25 teragrams CH4 per year emissions estimated for the region from inversion models based on atmospheric CH4 concentration data.
Voluntary reports submitted under the Partnership to provide SF6 emission estimates for the previous calendar year are due to EPA on March 31st annually.
The UK, US and Germany all published official carbon dioxide emissions estimates for 2014 at the end of March.
The research, based on a literature review and analysis of scientific methods used to derive emissions estimates, concludes that palm oil produced in peatland areas generates 86 metric tons of carbon dioxide per hectare per year over a 50 - year time period, well above the 50 ton estimate used previously.
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