Sentences with phrase «methane emissions measurement»

E.P.A. has not yet had the opportunity to fully review the PNAS study on methane emissions; however we are encouraged that more methane emissions measurement data are now available to the public.

Gavin, the methanetracker.org website says this: «All the methane emissions measurements come from the Infrared Atmospheric Sounding Interferometer (IASI) instrument, aboard of the MetOp series of polar orbiting satellites of the European Space Agency (ESA).

Not exact matches

Direct measurements of methane emissions are not available for all sources of methane..

Global annual emissions calculated from laboratory measurements could reach 1.5 x 1014 grams of methane and 5 x 1016 grams of carbon dioxide.

Field measurements of methane emissions from two termite nests in Guatemala corroborated the laboratory results.

The study team hopes its measurements of liquid unloadings and pneumatic devices will provide a clearer picture of methane emissions from natural gas well sites and about the relationship between well characteristics and emissions.

The study is the second phase of the team's 2013 study, which included some of the first measurements for methane emissions taken directly at hydraulically fractured well sites.

In late March, the Obama administration released guidance directing U.S. EPA to address methane emissions from the oil and gas industry, after a number of studies measuring emissions from the air, known as «top - down» measurements, showed that the agency's emissions estimates for the industry were too low (ClimateWire, March 31).

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 activities.

David Allen, a University of Texas researcher who conducted measurements from natural gas fields to measure methane emissions, called the study an «important contribution.»

Geochemical records from measurements of the foraminifera shells and fauna analyses will help us evaluate the changes in methane emissions, while studies of living and fossil species distribution and abundance of the benthic foraminifera community in methane seep areas will indicate the degree of methane release through time.

The best way to estimate the magnitude of fossil methane emissions is by using measurements of methane isotopes, such as carbon.

That meant, for example, traveling the globe to the various natural emissions sources — such as wetlands and land seeps — and conducting measurements and calculations of the methane emitted.

This work presents direct measurements of methane emissions from multiple sources at onshore natural gas production sites incorporating operational practices that have been adopted or become more prevalent since the 1990s.

We find (i) measurements at all scales show that official inventories consistently underestimate actual CH4 [methane] emissions, with the natural gas and oil sectors as important contributors; (ii) many independent experiments suggest that a small number of «super-emitters» could be responsible for a large fraction of leakage; (iii) recent regional atmospheric studies with very high emissions rates are unlikely to be representative of typical natural gas system leakage rates; and (iv) assessments using 100 - year impact indicators show system - wide leakage is unlikely to be large enough to negate climate benefits of coal - to - natural gas substitution.

As NOAA's Mauna Loa measurement of atmospheric methane concentrations are only currently increasing at a rate of approximately 0.25 % per year (or 12.5 % change in 50 - years); how could anyone be concerned that the change in atmospheric methane burden in 50 - years could be 300 % (as per Isaken et al (2011) case 4XCH4; which would require an additional 0.80 GtCH4 / yr of methane emissions on top of the current rate of methane emissions of 0.54 GtCH4 / yr)?

Almost all of the methane leakage calculated from the Texas research «could be affected by this measurement failure,» according to the paper; «their study appears to have systematically underestimated emissions.»

A major call from our April 2011 paper was for direct measurements of methane emissions by independent scientists.

Ditto with the rapid increase in methane emissions from the Arctic region as flask measurements indicate, as well as satellite measurements.

«In addition, we are currently developing a method that also allows for high - precision hydrogen isotopic measurements on methane in ice cores, which will further improve our emission flux constraints,» revealed Fischer.

Measurement of the 13C isotopic signature of methane emissions from Northern European wetlands.

The Trump administration has killed NASA's Carbon Monitoring System, which was responsible for compiling data from separate satellite and aircraft measurements of CO2 and methane emission across the Earth.

In the short - term, a key issue that needs resolving is the mismatch between global methane budgets from top - down (derived from atmospheric measurements) and bottom - up (derived from measurements of methane emissions at the land surface from different methane producing environments) approaches.

The paper is based on an analysis of global methane emissions examining almost 20,000 field data measurements collected from 70 sites across Arctic, temperate and tropical regions.

Using SCIAMACHY satellite data as well as ground - based measurements from 2003 to 2009, researchers found that the region where Arizona, New Mexico, Colorado, and Utah intersect had atmospheric methane concentrations equivalent to about 1.3 million pounds of emissions a year.

This report found that direct measurements of methane emissions from 190 onshore natural gas sites in the United States indicate that methane emissions from completed wells are are lower than commonly thought although the report also acknowledged that emissions from pneumatic controllers and other equipment associated with natural gas production facilities were higher than previously estimated.

Aircraft measurements confirm that methane emissions from northern European wetlands exhibit a uniform regional carbon isotopic signature, despite considerable ground - level heterogeneity.

Using measurements from the first years of SCIAMACHY it had already been demonstrated prior to the start of this project that regional methane emissions can be well constrained via inverse modelling approaches.

This parallels a recent NOAA study of atmospheric methane measurements that found that «methane emissions from natural gas as a fraction of production have declined from approximately 8 per cent to approximately 2 per cent over the past three decades» — with production soaring in recent years.

Schwietzke S., G. Pétron, S. Conley, C. Pickering,..., C. W. King, A. B. White, L. Bianco and R. C. Schnell (May 2017): Improved Mechanistic Understanding of Natural Gas Methane Emissions from Spatially Resolved Aircraft Measurements.

Present measurement and accounting of fugitive emissions of methane from unconventional gas extraction is inadequate.

Translating across discipline - specific vocabularies was essential to understanding mismatches in estimates of methane emissions from permafrost based on field measurements and on atmospheric data.

To do this, countries and their oil and gas industry partners need to significantly improve measurement and accounting of methane emissions from the sector.

What the NYT fails to mention is the fact that the National Academy of Sciences (NAS) report actually recommended regulators use a combination of facility - level (bottom - up), aircraft and tower measurements (top - down) and satellite measurements in order to improve accuracy of methane emission inventories.

It will be essential for countries to integrate better measurement and management of oil and gas methane emissions into the development, assessment and implementation of long - term GHG mitigation plans to maximize GHG reductions from those policies.

There aren't many long term measurements of seepage so we don't really know how methane emissions are changing (other than the slow rise shown at measuring stations).

This report summarizes the current state of understanding of methane emission sources and the measurement approaches and evaluates opportunities for methodological and inventory development improvements.

The most significant is that the UT Austin study looked only at the production stage of natural gas, while the Harvard study used atmospheric measurements to estimate methane emissions from all sources.

This work emphasizes the need for top - down identification and component level and event driven measurements of methane leaks to properly inventory the combined methane emissions of natural gas extraction and combustion to better define the impacts of our nation's increasing reliance on natural gas to meet our energy needs.

The results of the new measurement studies are distressing, but they are also frustrating — not just because natural gas comprises a growing share of U.S. energy, but because we know how to rein in methane emissions.

The Department of Energy can use its role as the research and development arm of the federal government to improve the effectiveness and reduce the costs of emissions measurement and control technologies, such as methane isotope analyzers, infrared cameras, and portable compressors.