Variations in ring width and gas components in wood of larch trees injured by the fire of 1908
B.G. Ageev1, V.A. Sapozhnikova1, A.N. Gruzdev2, D.A. Savchuk3
1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
2A.M. Obukhov Institute of Atmospheric Physics Russian Academy of Sciences, Moscow, Russia
3Institute of Monitoring of Climatic and Ecological Systems of the Siberian Branch of the Russian Academy of Sciences, Tomsk, Russia
Keywords: larch disc, fire injury, tree ring width, Tunguska space body, СО2, (CO2+Н2О), solar activity
Abstract
The CO2 content in tree wood and the radial increment of trees can change under the impact of ground fires. The larch discs under study survived the fire of 1908 after the explosion of the space body in the Podkamennaya Tunguska revealed a number of features in the behavior of absorbed CO2 and (CO2 + H2O) in larch wood. The photoacoustic analysis of samples vacuum-desorbed from tree rings has shown a long-term annual accumulation of CO2 and (CO2 + H2O) in tree stems after 1908. A change in CO2 release cycling in the post-catastrophic period is ascertained. A change in variation cycling is also noted in the tree ring chronologies. According to the analysis of the correlation coefficients, the specific behavior of the larch ring width chronologies in this region is most likely due to variations in the solar activity.
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