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Methane Emissions - Astrophysics Data System

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Last Updated: 08 June 2022

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Methane emissions from Alaska in 2012 from CARVE airborne observations

"Alaska registered 2. 1 0. 5 Tg CH 4 during the 2012 growing season, unprecedented amount in the region despite widespread permafrost thaw and other signs of climate change. " Emissions from boreal regions were much higher than those from North Slope tundra. This is the first national survey of methane emissions from Arctic and boreal regions over a growing season, according to our findings.

Source link: https://ui.adsabs.harvard.edu/abs/2014PNAS..11116694C/abstract


Identification and characterization of high methane-emitting abandoned oil and gas wells

"Millions of abandoned oil and gas wells exist throughout the United States and around the world. " As estimated in coal areas, methane leaks from abandoned wells persist for several years and likely decades, high emitters seem to be unplugged gas wells and plugged/vented gas wells, as suggested in coal areas, and the number of abandoned wells in Pennsylvania alone could be as high as 750,000.

Source link: https://ui.adsabs.harvard.edu/abs/2016PNAS..11313636K/abstract


Emerging role of wetland methane emissions in driving 21st century climate change

"Our findings indicate that global wetland CH 4 emissions have increased as a result of processes mainly related to methane emissions' sensitivity to temperature and changing global wetland area. " We emphasize that climate change and wetland CH 4 responses to radiative forcing are a significant component of climate change, and they should be included in policies aiming to reduce global warming below 2°C.

Source link: https://ui.adsabs.harvard.edu/abs/2017PNAS..114.9647Z/abstract


Global health benefits of mitigating ozone pollution with methane emission controls

"Reducing methane emissions therefore minimizes surface ozone everywhere, even as decreasing global temperature change," the author states, although methane mitigation has been considered for climate change. " According to the average daily maximum 8-hour surface ozone, which is reduced by 20% beginning in 2010 will decrease the average daily maximum 8-h surface ozone by u22481 part per billion by volume globally. This ozone reduction is expected to reduce ozone depletion globally in 2030 and 2090 million between 2010 and 2030, according to epidemiologic ozone-mortality relationships. These estimated air pollution ancillary savings of climate-motivated methane emission reductions are comparable to those estimated previously for CO 2. Methane mitigation provides a unique opportunity to improve air quality around the world and can also be a cost-effective component of international ozone management, providing numerous benefits for air quality, public health, agriculture, climate, and energy. ".

Source link: https://ui.adsabs.harvard.edu/abs/2006PNAS..103.3988W/abstract


Direct measurements of methane emissions from abandoned oil and gas wells in Pennsylvania

"Recent reports show that greenhouse gas emission inventories are most likely lacking methane emission sources. " We measured methane leaks from our direct measurements of abandoned wells in Pennsylvania, resulting in 4-7% of total anthropogenic methane emissions in Pennsylvania. Additional measurements of methane emissions from abandoned wells and their incorporation in greenhouse gas inventories will assist in designing and implementing effective greenhouse gas emission reduction policies. ".

Source link: https://ui.adsabs.harvard.edu/abs/2014PNAS..11118173K/abstract


Reconciling divergent estimates of oil and gas methane emissions

"Past studies" that report conflicting estimates regarding natural gas's full footprint contradicts arguments about misthane emissions from the natural gas supply chain's divergent estimates of methane emissions. " We reconcile top-down and bottom-up methane emissions estimates in one of the country's key natural gas production basins using quickly replicable measurement and data integration techniques. ".

Source link: https://ui.adsabs.harvard.edu/abs/2015PNAS..11215597Z/abstract


Measurements of methane emissions at natural gas production sites in the United States

"This research reports direct measurements of methane emissions at 190 onshore natural gas sites in the United States. " Estimates of total emissions are similar to the most recent EPA national inventory of methane emissions from natural gas production.

Source link: https://ui.adsabs.harvard.edu/abs/2013PNAS..11017768A/abstract


Termite mounds mitigate half of termite methane emissions

"Using field data, we find that termite mounds oxidize, on average, half of the CH 4 produced by termites before release. " This "hidden" biofilter system is mediated by methanotrophic bacteria living in the mound walls or soil below, for which internal termite-mound structures can facilitate CH4 transport. In addition, we estimate undisturbed termite biomass by CH 4 emissions. ".

Source link: https://ui.adsabs.harvard.edu/abs/2018PNAS..11513306N/abstract


Toward a better understanding and quantification of methane emissions from shale gas development

"We detected a significant regional flux of methane over a wide region of shale gas wells in southwestern Pennsylvania during the Marcellus period, and then discovered several pads with high methane emissions. ".

Source link: https://ui.adsabs.harvard.edu/abs/2014PNAS..111.6237C/abstract


Quantification of methane emissions from hotspots and during COVID-19 using a global atmospheric inversion

"The biggest national difference discovered between previous and subsequent CH 4 emissions is from China, mainly due to the energy sector. " According to our estimates, global anthropogenic CH 4 emissions for the first six months of 2020 were, on average, 470 Gg per month higher than those for 2019, largely due to the energy and agricultural sectors. During the onset of the global slowdown energy sector's CH4 emissions from China, the numbers indicate that during the first year's consistent year-on-year positive trend in emissions, emissions increased above target levels; however, in later months, emissions fell below target levels. The cumulative effect of the COVID-19 downturn in CH 4 emissions from March-June 2020 could be small relative to the long-term positive trend in emissions," COVID-19's findings for the first 6 months of 2019/20 indicate that the cumulative effect of the COVID-19 decline in CH 4 emissions from March-June 2020's first 6 months of emissions might be small relative to the long-term positive trend in emissions. ".

Source link: https://ui.adsabs.harvard.edu/abs/2022ACP....22.5961M/abstract

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions