@article{3e9301f4408b4e2083ed6a8f2110befc,
title = "Estimating Methane Emissions From Underground Coal and Natural Gas Production in Southwestern Pennsylvania",
abstract = "Production of coal and natural gas is responsible for one third of anthropogenic methane (CH4) emissions in the United States. Here we examine CH4 emissions from coal and natural gas production in southwestern Pennsylvania. Using a top-down methodology combining measurements of CH4 and ethane, we conclude that while Environmental Protection Agency inventories appear to report emissions from coal accurately, emissions from unconventional natural gas are underreported in the region by a factor of 5 (±3). However, production-scaled CH4 emissions from unconventional gas production in the Marcellus remain small compared to other basins due to its large production per well. After normalizing emissions by energy produced, total greenhouse gas emissions from Pennsylvania unconventional natural gas production produce half the carbon footprint compared to regionally produced coal, with carbon dioxide emissions from combustion being the dominant source of greenhouse gas emissions for both sources.",
author = "Barkley, {Z. R.} and T. Lauvaux and Davis, {K. J.} and A. Deng and A. Fried and P. Weibring and D. Richter and Walega, {J. G.} and J. DiGangi and Ehrman, {S. H.} and X. Ren and Dickerson, {R. R.}",
note = "Funding Information: Observational work by the University of Maryland was supported by the National Science Foundation (NSF grant CBET-1438400) and the National Institute of Science and Technology (NIST Cooperative Agreement 70NANB14H333). The Atmospheric Carbon and Transport (ACT)-America project is a NASA Earth Venture Suborbital 2 project funded by NASA's Earth Science Division (grant NNX15AG76G to Penn State). UMD aircraft data can be found at the website (http://www.atmos.umd. edu/∼rammpp/ archives/ArchiveFlightData.html). ACT-America aircraft data can be found at the website (https:// daac.ornl.gov/cgi-bin/dataset_ lister.pl?p=37). NCEP Reanalysis data were provided by the NOAA/OAR/ESRL PSD, Boulder, Colorado, USA, from their Web site (https://www.esrl.noaa.gov/psd/). Funding Information: Observational work by the University of Maryland was supported by the National Science Foundation (NSF grant CBET-1438400) and the National Institute of Science and Technology (NIST Cooperative Agreement 70NANB14H333). The Atmospheric Carbon and Transport (ACT)-America project is a NASA Earth Venture Suborbital 2 project funded by NASA's Earth Science Division (grant NNX15AG76G to Penn State). UMD aircraft data can be found at the website (http://www.atmos.umd.edu/~rammpp/archives/ArchiveFlightData.html). ACT-America aircraft data can be found at the website (https://daac.ornl.gov/cgi-bin/dataset_lister.pl?p=37). NCEP Reanalysis data were provided by the NOAA/OAR/ESRL PSD, Boulder, Colorado, USA, from their Web site (https://www.esrl.noaa.gov/psd/). Publisher Copyright: {\textcopyright}2019. American Geophysical Union. All Rights Reserved.",
year = "2019",
month = apr,
day = "28",
doi = "10.1029/2019GL082131",
language = "English (US)",
volume = "46",
pages = "4531--4540",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "American Geophysical Union",
number = "8",
}