Mark Omara

Scientist, Global Methane


Areas of expertise:
Methane emissions, global oil and natural gas, climate change impacts

Mark is a Scientist in EDF’s Office of the Chief Scientist. His current work focuses on the assessment and source attribution of methane emissions from global oil and gas operations.


Mark holds a PhD in Chemical Engineering from Clarkson University, Potsdam, NY. Prior to joining EDF, he worked as a Postdoctoral Research Fellow at Carnegie Mellon University’s Center for Atmospheric Particle Studies where he led the measurements and emissions characterization of methane from oil and natural gas production sites in the Marcellus Shale. He was also actively involved in several methane emissions measurement campaigns focusing on oil and gas upstream and midstream facilities across the country.


Phd, Chemial Engineering, Clarkson University, Potsdam, NY (2013)
MS, Chemical Engineering, Clarkson University, Potsdam, NY (2010)
BS, Industrial Chemistry, Makerere University, Kampala, Uganda (2008)


For a full list of journal publications, please click here.

“Methane emissions from US low production oil and natural gas oil well sites.” M. Omara, D. Zavala-Araiza, D. Lyon, B. Hmiel, K. Roberts, S. Hamburg. Nat. Comm. 13, 574 (2022).

“Reconstructing and quantifying methane emissions from the full duration of a 38-day natural gas well blowout using space-based observations.” J.D. Maasakkers, M. Omara, R. Gautam, A. Lorente, S. Pandey, P. Tol, T. Borsdorff, S. Houweling, I. Aben. Remote Sens. Environ. 270, 112755 (2021)  

“Closing the methane gap in US oil and natural gas production emissions inventories.” J.S. Rutherford, E.D. Sherwin, A.P. Ravikumar, G.A. Heath, J. Englander, D. Cooley, D. Lyon, M. Omara, Q. Langfitt, A.R. Brandt. Nat. Comm. 12, 4715 (2021).

“Unravelling a large methane emission discrepancy in Mexico using satellite observations.” L. Shen, D. Zavala-Araiza, R. Gautam, M Omara, T. Scarpelli, J. Sheng, M.P. Sulprizio, J. Zhuang, Y. Zhang, Z. Qu, X. Lu, S.P. Hamburg, D.J. Jacob. Remote Sens. Environ. 260, 112461 (2021)

“Concurrent variation in oil and gas methane emissions and oil price during the COVID-19 pandemic.” D.R. Lyon, B. Hmiel, R. Gautam, M. Omara, K.A. Roberts, Z.R. Barkley, K.J. Davis, N.L. Miles, V.C. Monteiro, S.J. Richardson, S. Conley, M.L. Smith, D.J. Jacob, L. Shen, D.J. Varon, A. Deng, X. Rudelis, N. Sharma, K.T. Story, A.R. Brandt, M. Kang, E.A. Kort, A.J. Marchese, S.P. Hamburg. Atm. Chem. Phys. 21, 6605-6626 (2021).