Greenhouse gas (GHG) fluxes from tree stems is a relatively new area of research that is gaining recognition as a potentially important source of GHG emissions. Understanding temporal dynamics of tree stem fluxes is particularly important because the magnitude and patterns of these fluxes are poorly understood (especially methane) and the production sources and transport mechanisms of GHG’s in tree stems are still largely unknown. As a result not enough is known about tree stem emissions to determine their contribution to whole ecosystem GHG budgets (Vargas & Barba, 2019). Most studies measuring tree stem GHG fluxes are performed with manual chamber measurements, with a typical frequency of 2-3 weeks which does not provide the resolution required to fully understand the temporal dynamics of these emissions. In this case study, Dr. Barba used the eosAC soil gas flux chambers to investigate the temporal dynamics of fluxes from the stems of oak trees in order to better understand
these underlying dynamics.



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