Variations of gas components and total pressure in stem and root disc wood of conifer species
B.G. Ageev1, A.N. Gruzdev2, V.A. Sapozhnikova1
1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634021, Russia
2A.M. Obukhov Institute of Atmospheric Physics Russian Academy of Sciences, Pyzhevsky per., 3, 119017, Moscow, Russia
Keywords: хвойные деревья, цикличность, СО, поздняя древесина, корень сосны, conifers, cyclicity, latewood, pine root
Abstract
The content of CO2 and H2O in vacuum-extracted tree-ring wood of stem and root discs of certain conifer species was measured. Annual distributions of these gas components were found to exhibit cyclic behavior. Moreover, distinct cyclicity was also revealed in interannual variations of the total pressure of the vacuum-extracted tree-ring gas samples. It may be safely suggested that diffusion of stem CO2 into the atmosphere will show the same periodic variability. Two hypotheses about the origin of the cyclicity in the tree-ring CO2 distributions are examined.
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