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Session Proposal: Targeting Methane Mitigation: Quantification of Anthropogenic Methane Sources at all Scales through Atmospheric Measurements (AGU25)

A093
Targeting Methane Mitigation: Quantification of Anthropogenic Methane Sources at all Scales through Atmospheric Measurements

Session ID#: 247459

Session Description:
Methane is the second most important greenhouse gas, responsible for approximately 25% of total radiative forcing, and atmospheric mixing ratios continue to rise. Urgent emissions reductions are required to lower peak warming. Globally, anthropogenic methane originates from a wide range of sources such as fossil fuel production, rice cultivation, ruminants, and waste. Each sector presents unique challenges to measure and mitigate. Measurements inform emissions estimates from all sectors, while bottom-up inventories currently serve as the basis for assessing mitigation progress. This session highlights studies using measurements at all scales (from chambers to satellites) to quantify anthropogenic methane emissions, emphasizing analyses that (1) advance technology and/or methods to provide accurate and repeatable emissions measurements, (2) allow attribution of emissions to specific sources, and/or (3) upscale measurement-derived estimates into inventories and budgets to inform stakeholders on mitigation and policy pathways.
Index Terms:

0345 Pollution: urban and regional [ATMOSPHERIC COMPOSITION AND STRUCTURE]
0394 Instruments and techniques [ATMOSPHERIC COMPOSITION AND STRUCTURE]
1610 Atmosphere [GLOBAL CHANGE]
1631 Land/atmosphere interactions [GLOBAL CHANGE]
Primary Convener:  James L France, Environmental Defense Fund & Royal Holloway University, London, United Kingdom
Conveners:  Mary Kang, McGill University, Department of Civil Engineering, Montreal, QC, Canada, Anna Karion, National Institute of Standards and Technology, Gaithersburg, United States and Alba Lorente, Environmental Defense Fund, Torremolinos, Malaga, SPAIN
Student/Early Career Convener:  James D. East, Harvard University, School of Engineering and Applied Sciences, Cambridge, MA, United States
 
Integrating MethaneAIR Aircraft and TROPOMI Satellite Observations in the Integrated Methane Inversion (IMI) to Optimize Methane Emissions (1846553)
Jack Bruno1, Daniel J. Jacob2, Ritesh Gautam3, Mark Omara3, Xiaolin Wang2, Daniel J. Varon2, Lucas Estrada2, Steven C Wofsy4 and Melissa Payer Sulprizio2, (1)Harvard University, Department of Earth and Planetary Sciences, Cambridge, United States, (2)Harvard University, School of Engineering and Applied Sciences, Cambridge, United States, (3)Environmental Defense Fund, New York, United States, (4)Harvard University, Harvard John A. Paulson School of Engineering and Applied Sciences, Cambridge, United States
 
Constructing a methane emissions inventory in the Cincinnati Metropolitan area (1851554)
Amy Townsend-Small, University of Cincinnati Main Campus, Cincinnati, United States and Ella Caudill, University of Cincinnati, Cincinnati, United States
 
Methane Emissions from Unplugged Abandoned Oil and Gas Wells in Louisiana, USA (1851590)
Kanchan Maiti1, Francis Driscoll1, Ipsita Gupta2, Kaitlyn Hall1 and Anandkumar Arumugam1, (1)Louisiana State University, Department of Oceanography and Coastal Sciences, Baton Rouge, United States, (2)Louisiana State University, Craft & Hawkins Department of Petroleum Engineering, Baton Rouge, LA, United States
 
Rapidly Identifying and Quantifying Discrete Methane Sources for MethaneSAT and MethaneAIR Using Processing Pipeline (1861325)
Dr. Zhan Zhang, PhD1, Maryann Sargent2, Raia Ottenheimer3, Jack Warren4, Luis Guanter5, James Williams6, Mark Omara1, Marcus Russi1, Sasha Ayvazov1, Nicholas LoFaso1, Sébastien Roche2, Christopher Chan Miller7, Ethan D. Kyzivat8, Marvin Knapp9, Joshua Simon Benmergui10, Jasna V. Pittman11, Eleanor Walker12, Ethan Manninen13, Apisada Chulakadabba11, Jacob Bushey11, Bingkun Luo14, David Miller1, Maya Nasr1, Kang Sun15, Ritesh Gautam1, Jonathan E Franklin2, Xiong Liu14, Steven C Wofsy11 and MethaneSAT Science and Engineering Team, (1)Environmental Defense Fund, New York, United States, (2)Harvard University, Cambridge, United States, (3)Harvard University, Toronto, United States, (4)Environmental Defense Fund, New York, NY, United States, (5)Research Institute of Water and Environmental Engineering (IIAMA), Universitat Politècnica de València, Valencia, Spain, (6)St. Francis Xavier University, Department of Earth Sciences, Antigonish, NS, Canada, (7)Environmental Defense Fund, Harvard University, Cambridge, United States, (8)Harvard University, Earth and Planetary Sciences, Cambridge, United States, (9)Heidelberg University, Institute of Environmental Physics, Heidelberg, Germany, (10)MethaneSAT, LLC, Austin, United States, (11)Harvard University, Harvard John A. Paulson School of Engineering and Applied Sciences, Cambridge, United States, (12)Stanford University, Earth Systems Science, Stanford, United States, (13)Harvard University, John A. Paulson School of Engineering and Applied Sciences, Cambridge, MA, United States, (14)Center for Astrophysics | Harvard & Smithsonian, Cambridge, United States, (15)Harvard-Smithsonian Center for Astrophysics, Cambridge, United States
 
GENERATING A BOTTOM-UP INVENTORY OF NON-OIL AND GAS METHANE EMISSIONS IN THE DENVER-JULESBURG BASIN (1867163)
Mercy Mbua1, Anna Lily Hodshire2, Elijah Kiplimo2, Stuart Riddick1 and Daniel Zimmerle2, (1)Colorado State University, Fort Collins, United States, (2)Colorado State University, Energy Institute, Fort Collins, United States
 
A First Measurement-Based Oil and Gas Sector Methane Inventory for Colombia (Invited) (1872647)
Matthew Johnson, Nikolai Calderón-Cangrejo, Simon Festa-Bianchet, Shona Wilde, Bradley Mark Conrad and David R Tyner, PhD, Carleton University, Energy & Emissions Research Lab (EERL), Ottawa, ON, Canada
 
Assessing the ability of in situ measurements to constrain local methane emissions and their trends in New York State (1879749)
Matthew Loman1, Lee T Murray2, Peter Ivatt3, Roisin Commane4, Joannes Maasakkers5, Eric M Leibensperger6, Andrew Hallward-Driemeier7 and Raghav Dhall4, (1)University of Rochester, Department of Earth and Environmental Sciences, Rochester, United States, (2)University of Rochester, Department of Earth and Environmental Sciences, Rochester, NY, United States, (3)University of Rochester, Rochester, United States, (4)Columbia University, New York, United States, (5)SRON Space Research Organization Netherlands, Leiden, Netherlands, (6)Ithaca College, Department of Physics and Astronomy, Ithaca, United States, (7)Lamont-Doherty Earth Observatory, Palisades, United States
 
Quantifying Total Methane Emissions on Basin-Scales Using MethaneSAT Satellite Data (1892404)
Marvin Knapp1,2, Joshua Simon Benmergui1,2, Ethan D. Kyzivat1, Apisada Chulakadabba1,3, Jacob Bushey1, Maryann R Sargent4, Dr. Zhan Zhang, PhD2, Sébastien Roche2,5, Christopher E Miller1,2, Marcus Russi2, Sasha Ayvazov2, James Williams2, Nicholas LoFaso2, Ritesh Gautam2 and Steven C Wofsy1, (1)Harvard University, Harvard John A. Paulson School of Engineering and Applied Sciences, Cambridge, United States, (2)Environmental Defense Fund, New York, United States, (3)Technical University of Munich, Munich, Germany, (4)Harvard University, Harvard John A. Paulson School of Engineering and Applied Sciences, Cambridge, MA, United States, (5)Harvard University, Cambridge, United States
 
Quantification of Methane Emissions from Dispersed Controlled Release Sources Utilizing Ground-based Hyperspectral Imaging (1897779)
Mu-An Tsai1, Avery Opalka1, Rafee Iftakhar Hossian2, Lindelwa Coyle3, David A Risk2 and Kyle Daun1, (1)University of Waterloo, Waterloo, Canada, (2)St. Francis Xavier University, Earth and Environmental Sciences, Antigonish, NS, Canada, (3)St. Francis Xavier University, Antigonish, Canada
 
Controlled Release Testing of Multiple Classes of Methane Measurement Technology at the TADI Facility (1898008)
Audrey McManemin, Stanford University, Energy Science and Engineering, Stanford, United States, Catherine Juéry, TotalEnergies, Air Quality Laboratory, Lyon, France, Vincent Blandin, TotalEnergies, Platform for Experimental Research (PERL), Lacq, France and Adam R Brandt, Stanford University, Department of Energy Science and Engineering, Stanford, CA, United States
 
Observation of Seasonal Wetland Methane Emissions Using Optical Techniques (1900686)
Avery Opalka, Mu-An Tsai, Emily Vesnaver, Tonya DelSontro and Kyle Daun, University of Waterloo, Waterloo, Canada
 
Using Mobile Measurements to Detect Fugitive Methane Emissions in New York City (1907954)
Thomas Moore1, Roisin Commane2, James R Hopkins3, Will Stephen Drysdale4, Raghav Dhall2, Andrew Hallward-Driemeier5, Yuwei Zhao2 and James D Lee6, (1)University of York, Chemistry, York, YO10, United Kingdom, (2)Columbia University, New York, United States, (3)University of York, Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry, York, United Kingdom, (4)Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry, University of York, York, United Kingdom, (5)Lamont-Doherty Earth Observatory, Palisades, United States, (6)University of York, Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry, York, YO10, United Kingdom
 
Landfill Sector Methane Emission Estimates with the GHGSat Constellation (Invited) (1923737)
Dylan Jervis1, Marianne Girard1, Jean-Philippe MacLean1, David J Marshall2, Jason McKeever1, Antoine Ramier1, Mathias Strupler1, Ewan Tarrant1 and David Young1, (1)GHGSat, Inc., Montréal, QC, Canada, (2)GHGSat, Inc., Montreal, QC, Canada
 
Regional Estimates of Methane Emissions from MethaneSAT Observations: Insights from the Permian Basin and the San Joaquin Valley (1926403)
James Williams1, Mark Omara1, Marvin Knapp1, Joshua Simon Benmergui2, Anthony Himmelberger2, Katlyn MacKay1, Jack Warren1, Maryann R Sargent3, Marcus Russi1, Sasha Ayvazov1, Ethan D. Kyzivat4, Jonathan E Franklin5, Tom Melendez6, Nicholas LoFaso1, Christopher Chan Miller7, Sébastien Roche1, Jacob Bushey8, David Miller5, Maya Nasr1, Bingkun Luo9, Daniel Zavala-Araiza10, Steven C Wofsy5, Steve Hamburg1, Zhan Zhang8 and Ritesh Gautam1, (1)Environmental Defense Fund, New York, United States, (2)MethaneSAT, LLC, Austin, United States, (3)Harvard University, Harvard John A. Paulson School of Engineering and Applied Sciences, Cambridge, MA, United States, (4)Harvard University, Earth and Planetary Sciences, Cambridge, United States, (5)Harvard University, Cambridge, United States, (6)Environmental Defense Fund, Washington, United States, (7)Environmental Defense Fund, Harvard University, Cambridge, United States, (8)Harvard University, Harvard John A. Paulson School of Engineering and Applied Sciences, Cambridge, United States, (9)Center for Astrophysics | Harvard & Smithsonian, Cambridge, United States, (10)Environmental Defense Fund, International Scientist, Climate and Energy Program, Austin, United States
 
Quantifying Monthly Methane Emissions in Colombia from 2019–2024 Using Satellite Observations and National Inventory Data (1927814)
Sarah Hancock1, Daniel J. Jacob1, Rodrigo Jimenez-Pizarro2, Andres V. Ardila3, Luis A. Morales-Rincon4, Nicholas Balasus1 and Lucas Estrada1, (1)Harvard University, School of Engineering and Applied Sciences, Cambridge, United States, (2)National University of Colombia, Chemical and Environmental Engineering, Air Quality Research Group, Bogotá, Colombia, (3)Universidad Nacional de Colombia, Department of Chemical and Environmental Engineering, Bogota, Colombia, (4)SLC Association, Floridablanca, Colombia
 
Marginal Wells, Major Emitters: A Call for Comprehensive Methane Emission Measurements in the U.S. and Globally (1931014)
Zhongju Li, Elisabeth Lemaitre, Foteini Stavropoulou, David Lyon and Daniel Zavala Araiza, Environmental Defense Fund DC, Washington, United States
 
Sectoral methane emission estimates by high-resolution inversion of GOSAT-2 retrievals during 2019-2022. (1933721)
Rajesh Janardanan Achari1, Shamil S Maksyutov2, Fenjuan Wang2, Lorna Raja Nayagam1, Yukio Yoshida1, Xin Lan3,4 and Tsuneo Matsunaga1, (1)National Institute for Environmental Studies, Tsukuba, Japan, (2)National Institute for Environmental Studies, Satellite Observation Center, Tsukuba, Japan, (3)NOAA, Global Monitoring Laboratory, Boulder, United States, (4)University of Colorado Boulder, Cooperative Institute for Research in Environmental Sciences, Boulder, United States
 
Toward Regional Methane Source Attribution and Inventory Refinement Using MethaneSAT Flux Product and Earth Observation Satellite Imagery (1935153)
Yuyan Cui, Environmental Defense Fund, Boston, United States, Kevin Chen, Environmental Defense Fund and Stanford University, Stanford, United States and Donglai Xie, Environmental Defense Fund, New York, United States
 
Validating and characterizing performance of satellite-based methane point source emission quantification with Tanager (1936081)
Daniel Cusworth1, Alana Ayasse2, Jinsol Kim1, Kelly O'Neill3, Katherine Howell1 and Riley Duren4, (1)Carbon Mapper, Pasadena, United States, (2)University of Arizona, Tucson, United States, (3)University of Utah, Geography, Salt Lake City, United States, (4)Jet Propulsion Laboratory, Pasadena, United States
 
Estimating Methane Emissions in the Tokyo Metropolitan Area from Ground-Based Column Measurements (1943448)
Hirofumi Ohyama1, Matthias M. Frey2, Isamu Morino1, Kei Shiomi3, Masahide Nishihashi4 and Frank Hase2, (1)National Institute for Environmental Studies (NIES), Tsukuba, Japan, (2)Karlsruhe Institute of Technology, Institute of Meteorology and Climate Research (IMK-ASF), Karlsruhe, Germany, (3)Japan Aerospace Exploration Agency, Tsukuba, Japan, (4)Meteorological Research Institute, Tsukuba, Japan
 
A High-Temporal-Resolution Methane Budget for California from Multiscale Assimilation of Satellite, In Situ, and Plume Observations (1944411)
Sudhanshu Pandey1, John R Worden1, Vineet Yadav1, Matthew D Thill1, George Chang1, Hannah Obermiller Nesser1, Daniel J. Varon2, Lucas Estrada3 and Kevin Bowman1, (1)Jet Propulsion Laboratory, California Institute of Technology, Pasadena, United States, (2)Massachusetts Institute of Technology, Department of Aeronautics and Astronautics; Institute for Data, Systems, and Society, Cambridge, United States, (3)Harvard University, School of Engineering and Applied Sciences, Cambridge, United States
 
Mobile Measurement and Modelling of Methane Emissions from Anaerobic Digestion Facilities in the UK. (1946069)
Victoria Rafflin1, David Lowry1, James France1,2, Rebecca Fisher1, Mathias Lanoisellé1 and Aliah AlShalan1, (1)Royal Holloway, University of London, Department of Earth Sciences, Egham, United Kingdom, (2)Environmental Defense Fund Europe, Brussels Office, Brussels, Belgium
 
Single-Blind Evaluation of Emerging Continuous Methane Monitoring Systems Across 400+ Controlled Releases (1946185)
Taylor Adams1, Kevin Galvin2, Frances Reuland2, Sahar El Abbadi3, Trung Le4, Adam R Brandt5 and Eric A Kort1, (1)University of Michigan Ann Arbor, Climate and Space Sciences and Engineering, Ann Arbor, MI, United States, (2)Stanford University, Department of Energy Science and Engineering, Stanford, United States, (3)Lawrence Berkeley National Laboratory, Berkeley, United States, (4)Brown & Caldwell, Raleigh, United States, (5)Stanford University, Department of Energy Science and Engineering, Stanford, CA, United States
 
Quantifying methane emission trends in the United States (2019-2024) through high resolution inversion of satellite observations (1948993)
Lucas Estrada1, Megan He1, James D. East2, Daniel J. Varon3, Sarah Hancock1, Nicholas Balasus1, Melissa Payer Sulprizio1, Kevin Bowman4 and Daniel J. Jacob1, (1)Harvard University, School of Engineering and Applied Sciences, Cambridge, United States, (2)Harvard University, School of Engineering and Applied Sciences, Cambridge, MA, United States, (3)Massachusetts Institute of Technology, Department of Aeronautics and Astronautics; Institute for Data, Systems, and Society, Cambridge, United States, (4)Jet Propulsion Laboratory, California Institute of Technology, Pasadena, United States
 
Methane Source Apportionment Using the Ethane-to-Methane Enhancement Ratio in Urban and Oil & Gas Production Regions (1949067)
Xinrong Ren1, Phillip Stratton2, Jiayang Sun3, Paul Kelley2, Hannah Daley4, Anna Karion5, Ilan Stein6 and Russell R. Dickerson4, (1)NOAA College Park, College Park, MD, United States, (2)NOAA Air Resources Laboratory; Department of Atmospheric and Oceanic Science, University of Maryland, College Park, United States, (3)University of Maryland College Park, Department of Geology, College Park, MD, United States, (4)University of Maryland, Department of Atmospheric and Oceanic Science, College Park, United States, (5)National Institute of Standards and Technology, Gaithersburg, United States, (6)University of Maryland, College Park, United States
 
UNEP’s International Methane Emissions Observatory (IMEO): Advancing Empirical Methane Emission Estimates from the Coal sector through Multi-platform Field Campaigns (1949605)
Kushal Tibrewal and Robert Field, UNEP's International Methane Emissions Observatory, Paris, France
 
Assessing Methane Emissions from Ammonia Production Plants Worldwide (1951027)
Valerie Fox-Coughlin, Environmental Defense Fund, West St Paul, Minnesota, UNITED STATES, Daniel Zavala Araiza, Environmental Defense Fund, Amsterdam, Netherlands, Irving Rettig, Environmental Defense Fund, New York, United States and Sofia Esquivel Elizondo, Environmental Defense Fund, Remote, Germany
 
Development of rapid assessment and quantification of UK methane sources by offsite mobile measurement (1954273)
David Lowry, James France, Victoria Rafflin, Aliah AlShalan, Mathias Lanoisellé, Rebecca Fisher and Mackenzie LeVernois, Royal Holloway, University of London, Department of Earth Sciences, Egham, United Kingdom
 
Direct observation of plume velocity for remote measurement of trace gas point sources (1960066)
David R Thompson1, Michael L Eastwood1, Robert O Green1, Jay Fahlen1, Taylor Adams2, Adam R Brandt3, Philip G Brodrick4, Adam Chlus5, Eric A Kort2, Frances Reuland6 and Andrew K Thorpe7, (1)Jet Propulsion Laboratory, California Institute of Technology, Pasadena, United States, (2)University of Michigan Ann Arbor, Climate and Space Sciences and Engineering, Ann Arbor, MI, United States, (3)Stanford University, Department of Energy Science and Engineering, Stanford, CA, United States, (4)NASA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States, (5)University of Wisconsin-Madison, Department of Forest and Wildlife Ecology, Madison, United States, (6)Stanford University, Department of Energy Science and Engineering, Stanford, United States, (7)Jet Propulsion Laboratory, Pasadena, United States
 
Preliminary Satellite-Derived Methane Inversions for Estimating Oil and Gas Emissions from the San Joaquin Valley and Denver-Julesburg Basins (1963043)
Betsy Maria Farris1, Daven K Henze2, Lucas Estrada3, Francesca Mia Hopkins4, Tiffany Larrabee5, Ethan Emerson6 and Abhilash Vijayan6, (1)University of Colorado at Boulder, Boulder, United States, (2)University of Colorado Boulder, Boulder, United States, (3)Harvard University, School of Engineering and Applied Sciences, Cambridge, United States, (4)University of California Riverside, Department of Environmental Sciences, Riverside, CA, United States, (5)University of California Riverside, Department of Environmental Sciences, Riverside, United States, (6)Sonoma Technology, Inc., Petaluma, United States
 
Toward a Low-Cost, Solar Powered Optical Sensor for Ecosystem-Scale Methane Emissions Measurements from Wetlands and Rice Paddies (1968825)
Cassandra Huff1, Alison Hoyt2, Aiden Wilkin3, Michael LoCascio4, Zhenglin Zhang2, Jack Lamb2, Newton Nguyen2, Catherine Gorle5, Arun Majumdar6, Scott E Fendorf7 and Leo Hollberg3, (1)Stanford University, Electrical Engineering, Stanford, CA, United States, (2)Stanford University, Earth System Science, Stanford, United States, (3)Stanford University, Physics, Stanford, United States, (4)Stanford University, Civil and Environmental Engineering, Stanford, United States, (5)Stanford University, Civil and Environmental Engineering, Stanford, CA, United States, (6)Stanford University, Mechanical Engineering & Energy Science and Engineering, Stanford, United States, (7)Stanford University, Department of Earth System Science, Stanford, United States
 
Cross-roads of tropical methane emissions: Constraining emissions from Nigeria using TROPOMI satellite observations (1976082)
Lauren Potyk1, Daniel J. Jacob1, Sarah Hancock1, Lucas Estrada1, Melissa Payer Sulprizio1 and Jack Bruno2, (1)Harvard University, School of Engineering and Applied Sciences, Cambridge, United States, (2)Harvard University, Department of Earth and Planetary Sciences, Cambridge, United States
 
Mobile Survey Campaigns Reveal Regional Variability and Trends in Methane Emissions from Alberta’s Active and Suspended Oil and Gas Infrastructure (1977796)
Robyn Latimer1,2, Khalil El Hachem2, Mackenzie LeVernois3, Evelise Bourlon2, Martin Lavoie2 and David A Risk2, (1)Memorial University of Newfoundland, Engineering and Applied Sciences, St John's, Canada, (2)St. Francis Xavier University, Earth and Environmental Sciences, Antigonish, NS, Canada, (3)Royal Holloway, University of London, Department of Earth Sciences, Egham, United Kingdom
 
Advancing Greenhouse Gas Mapping with JPL’s AVIRIS, EMIT, and Carbon-I Instruments (1979318)
Andrew K Thorpe1, Robert O Green2, Christian Frankenberg1, Anna Michalak3, David R Thompson4, Michael L Eastwood2, Philip G Brodrick4, Dana Chadwick2, Valerie Scott5, Yunjin Kim6 and William Frazier6, (1)NASA Jet Propulsion Laboratory, Pasadena, United States, (2)Jet Propulsion Laboratory, California Institute of Technology, Pasadena, United States, (3)Carnegie Institution for Science Stanford, Department of Global Ecology, Stanford, United States, (4)NASA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States, (5)NASA Jet Propulsion Laboratory, Pasadena, CA, United States, (6)Jet Propulsion Laboratory, Pasadena, United States
 
System level greenhouse gas emissions from metropolitan wastewater and sludge process chain (1983145)
Yunpo Li, Lars P Wendt, James McSpiritt, Ryan J Boyd, Vladislav I Sevostianov, Yunseo Choi, Dan Moore, Nathan Li, Hongming Yi and Mark A Zondlo, Princeton University, Department of Civil and Environmental Engineering, Princeton, United States
 
Characterizing methane emissions with onsite lidar camera-based continuous monitoring systems (1991427)
Alex Pinard1, Andrew Pomerantz2, Dishita Sharma1, Greg Ross3, Dorit Hammerling1, Philip Waggoner1, Manasi Doshi2 and Leonardo Peneula2, (1)Colorado School of Mines, Applied Mathematics and Statistics, Golden, United States, (2)SLB, Houston, United States, (3)Cheniere Energy Inc., Houston, United States
 
Methane and Health-Damaging Pollutant Emissions from Natural Gas Commercial Cooking Appliances (1992053)
Eric Lebel1, Drew Michanowicz1, Yannai Kashtan1, Nicole Lucha1, Gan Huang1, Tamara Sparks1, Colin Finnegan2, Robert B Jackson2 and Seth B.C. Shonkoff1, (1)PSE Healthy Energy, Oakland, United States, (2)Stanford University, Earth System Science, Stanford, United States
 
Evaluating the Global Ethane Decline From 1982-2009 Using Historical and Modern Surface Measurements (1998155)
Christopher L Butenhoff1, Alex Smith1, Aubrey Koskela2, Andrew L Rice3 and Aslam Khan Khalil4, (1)Portland State University, Physics, Portland, OR, United States, (2)Pacific University, Forest Grove, United States, (3)Portland State University, Physics, Portland, United States, (4)Portland State University, Portland, OR, United States
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