Title: Controls on Stable Methane Isotope Values in Northern Peatlands and Potential Shifts in Values Under Permafrost Thaw Scenarios
Citation: Kuhn, M.A., Varner, R.K., McCalley, C.K., Perryman, C.R., Aurela, M., Burke, S.A., Chanton, J., Crill, P., DelGreco, J., Deng, J., Heffernan, L., Herrick, C., Hodgkins, S.B., Jones, C.P., Juutinen, S., Kane, E., Lamit, L.J., Larmola, T., Lilleskov, E., Olefeldt, D., Palace, M.W., Rich, V.I., Schulze, C., Shorter, J.H., Sullivan, F., Sonnentag, O., Turetsky, M., and Waldrop, M., 2024, Controls on stable methane isotope signatures in northern peatlands and potential shifts in signatures under permafrost thaw scenarios: EMERGE: https://emerge-db.asc.ohio-state.edu/datasources/0154_A2A_Summary_Files
Study Site: Smith Creek, Northwest Territories and Lutose, Alberta
Purpose: Northern peatlands are a globally significant source of methane (CH4), and emissions are projected to increase due to warming and permafrost loss. Understanding the microbial mechanisms behind patterns in CH4 production in peatlands will be key to predicting annual emissions changes, with stable carbon isotopes (δ13C-CH4) being a powerful tool for characterizing these drivers. Given that δ13C-CH4 is used in top-down atmospheric inversion models to partition sources, our ability to model CH4 production pathways and associated δ13C-CH4 values is critical. We sought to characterize the role of environmental conditions, including hydrologic and vegetation patterns associated with permafrost thaw, on δ13C-CH4 values from high-latitude peatlands.
Abstract: Data summaries from the five peatland complexes sampled by the A2A project (APEX, Lutose, Smith Creek, Kaamanen, Stordalen Mire). Data includes: CH4 fluxes and δ13C values, porewater CH4 and CO2 concentrations and δ13C and δD values, vegetation cover (by species and functional type), environmental data (pH, water table depth, and soil temperatures), and BAWLD landcover classifications (Olefeldt et al. 2021 ESSD) for each sampled site.
Supplemental Information Summary:
Research:
Further Info: Kuhn, M.A., Varner, R.K., McCalley, C.K., Perryman, C.R., Aurela, M., Burke, S.A., Chanton, J., Crill, P., DelGreco, J., Deng, J., Heffernan, L., Herrick, C., Hodgkins, S.B., Jones, C.P., Juutinen, S., Kane, E., Lamit, L.J., Larmola, T., Lilleskov, E., Olefeldt, D., Palace, M.W., Rich, V.I., Schulze, C., Shorter, J.H., Sullivan, F., Sonnentag, O., Turetsky, M., and Waldrop, M., 2024, Controls on stable methane isotope signatures in northern peatlands and potential shifts in signatures under permafrost thaw scenarios: Journal of Geophysical Research: Biogeosciences, v. 129, no. 7, e2023JG007837, 17 p., https://doi.org/10.1029/2023JG007837.
Status: Complete
Keywords:
methane,
meteorology,
vegetation,
carbon dioxide,
isotopes,
Geographical coordinates: North: 63.15, South: 59.50 East: -117.18 West: -123.28
Bounding Temporal Extent: Start Date: , End
Date:
