BMS 3122
Biomolecular Sciences Building
8314 Paint Branch Drive
College Park, MD 20742

jiayangs [at] umd [dot] edu

Stable Isotope Laboratory

James Farquhar

LinkedIn Google Scholar Curriculum Vitae

I focus on studying methane emissions through methane clumped isotopologue measurements (at UMD) and mobile/aircraft greenhouse gas monitoring surveys (at NOAA).

Dottin III, J.W., Farquhar, J., Kim, S.T., Shearer, C., Wing, B., Sun, J., Ni, P. (2022) Isotopic evidence of sulfur photochemistry during lunar regolith formation. Geochemical Perspectives Letters. 23 38-42. DOI: 10.7185/geochemlet.2235

Haghnegahdar, M.A., Sun, J., Hultquist, N., Hamovit, N.D., Kitchen, N., Eiler, J., Ono, S., Yarwood, S.A., Kaufman, A.J., Dickerson, R.R., Bouyon, A., Magen, C., Farquhar, J. (2023) Tracing sources of atmospheric methane using clumped isotopes. Proceedings of the National Academy of Sciences. 120(47) e2305574120. DOI: 10.1073/pnas.230557412

Sun, J., Farquhar, J. (2024) Fully resolved high-precision measurement of ³⁶S for sulfur reference materials. Rapid Communications in Mass Spectrometry. 38(14) e9768. DOI: 10.1002/rcm.9768

Sun, J., Haghnegahdar, M.A., Fernandez, J.M., Magen, C., Farquhar, J. (2025) Controls on concentrations and clumped isotopologues of vehicle exhaust methane. PLoS ONE. 20(2) e0315304. DOI: 10.1371/journal.pone.0315304