Home Instruments & Equipments Isotope-Chemistry (IC) unit Analyzers for measuring CO2 isotopes by laser spectrometry

Analyzers for measuring CO2 isotopes by laser spectrometry

Equipment dedicated to the analysis of δ13C and δ18O of CO2 in natural or enriched abundance

  • Isotopic laser spectrometer allowing for the measurement of target isotopologues (13C16O16O, 12C16O16O, 12C18O16O) at medium frequency and continuously. The results are normalized and standardized.
  • 2 laser spectrometers, one allowing the measurement of isotopologues 13C16O16O, 12C16O16O, and the second to measure the 3 isotopologues (13C16O16O, 12C16O16O, 12C18O16O).

They can be deployed in the field or in the laboratory to continuously measure the isotopic composition and average frequency of gas exchanges from the plant soil in the soil-plant-atmosphere continuum.

Applications:

  • modeling of biogeochemical cycles (soil-tree-atmosphere continuum)
  • water use efficiency carbon
  • allocation in the tree carbon
  • allocation in the ecosyste

 

Contact:

See also

  • M. Dannoura, P. Maillard, C. Fresneau, C. Plain, D. Berveiller, D. Gerant, C. Chipeaux, A. Bosc, J. Ngao, C. Damesin, D. Loustau, D. Epron. 2011. In situ assessment of the velocity of carbon transfer by tracing 13C in trunk CO2 efflux after pulse labelling: variations among tree species and seasons. New Phytologist. 190 : 181–192.
  • D.Derrien, C.Plain, P.-E.Courty, L.Gelhaye, T.C.W.Moerdijk-Poortvliet, F.Thomas, A.Versini, B.Zeller, L.-S Koutika, H.T.S. Boschker, D.Epron 2014. Does the addition of labile substrate destabilise old soil organic matter? 2014. Soil Biology and biochemistry. 76:149-160.
  • C. Douthe, E. Dreyer, D. Epron, C.R. Warren. 2011. Mesophyll conductance to CO2, assessed from online TDL-AS records of (CO2)-C-13 discrimination, displays small but significant short-term responses to CO2 and irradiance in Eucalyptus seedlings. Journal of Experimental Botany
  • D. Epron, J. Ngao, M. Dannoura, MR. Bakker, B. Zeller, S. Bazot, A. Bosc, C. Plain, JC. Lata, P. Priault, L. Barthes, D. Loustau, 2011.Seasonal variations of belowground carbon transfer assessed by in situ 13CO2 pulse labelling of trees. Biogeosciences. 8 : 1153-1168
  • D. Epron, M. Bahn, D. Derrien, FA Lattanzi, J. Pumpanen, A. Gessler, P. Hogberg P, P. Maillard P, M. Dannoura, D. Gerant, , N. Buchmann 2012. Pulse-labelling trees to study carbon allocation dynamics: a review of methods, current knowledge and future prospects. Tree Physiology 32(6): 776-798.
  • S. Goffin, M. Aubinet, M. Maier, C. Plain, H. Schack-Kirchner, B. Longdoz. 2014. Characterization of the soil CO2 production and its carbon isotope composition in forest soil layers using the flux-gradient approach. Agricultural and Forest Meteorology 188 45-57
  • N. Marron, C. Plain, B. Longdoz and D. Epron. 2009. Seasonal and daily time course of the 13C composition of soil CO2 efflux recorded with a tunable diode laser spectrophotometer (TDLS). Plant and Soil. 318 : 137-151
  • F. Parent, C.Plain, D. Epron, M. Maier, B. Longdoz. 2013. A new method for continuously measuring the δ13C of soil CO2 concentrations at different depths by laser spectrometry. European Journal of Soil Science. 64 : 516-525
  • C. Plain, D. Gérant, P. Maillard M. Dannoura, Y. Dong, B. Zeller, P. Priault, F. Parent, D. Epron. 2009. Tracing of recently assimilated carbon in respiration at high temporal resolution in the field with tuneable diode laser absorption spectrometer after in situ 13CO2 pulse labelling of 20 year-old beech trees. Tree Physiology. 29 : 1433-1445.

By: CM Publication date: 17 January 2022 Modification date: 26 August 2025