Xin Lan

Research Scientist

Carbon Cycle Greenhouse Gases (CCGG) group

Mailing Address:
NOAA Global Monitoring Laboratory
325 Broadway R/GML
Boulder CO 80305-3328


Xin Lan

Dr. Lan is a carbon cycle scientist with the Cooperative Institute for Research in Environmental Sciences of University of Colorado Boulder and NOAA Global Monitoring Laboratory. Her research focus on the carbon cycle and greenhouse gases, with a particular focus on understanding the sources and sinks of CH4 and other long-lived greenhouse gases (LLGHGs).

Dr. Lan is the scientific PI of discrete atmospheric CO2, CH4, N2O and SF6 measurements at over 50 sites in NOAA’s Global Greenhouse Gas Reference Network (GGGRN). She leads the reporting of NOAA’s global CO2, CH4, N2O and SF6 trends. She also serves as a Subject-Matter Expert for communicating greenhouse gas measurements and research findings with a wide range of audience including students, journalists, and the public. Dr. Lan is a member of the World Meteorological Organization’s Science Advisory Group for Greenhouse Gases.

Selected peer-reviewed publications:

  • Nisbet, E. G., Manning, M. R.,Dlugokencky, E. J., Michel, S. E., Lan, X., Röckmann, T., et al. (2023). Atmospheric methane: Comparison between methane's record in 2006–2022 and during glacial terminations, Global Biogeochemical Cycles,
  • Basu, S., Lan, X., Dlugokencky, E., Michel, S., Schwietzke, S., Miller, J.B., et al. (2022). Estimating emissions of methane consistent with atmospheric measurements of methane and δ13C of methane. Atmos. Chem. Phys.,
  • Lan, X., Basu, S., Schwietzke, S., Bruhwiler, L., Dlugokencky, E.J., Michel, S.E., et al. (2021). Improved constraints on global methane emissions and sinks using δ13C-CH4, Global Biogeochemical Cycles,
  • Lan X, Nisbet E. G., Dlugokencky E. J., Michel S. E., (2021). What do we know about the global methane budget? Results from four decades of atmospheric CH4 observations and the way forward. Phil. Trans. R. Soc. A.
  • Lan, X., Tans, P., Sweeney, C., Andrews, A., Dlugokencky, E., Schwietzke, S., et al. (2019). Long‐term measurements show little evidence for large increases in total US methane emissions over the past decade. Geophys. Res. Lett.,
  • Lan, X., Tans, P., Sweeney, C., Andrews, A., Jacobson, A., Crotwell, M., et al. (2017). Gradients of column CO2 across North America from the NOAA global greenhouse gas reference network. Atmos. Chem. Phys.,