A Laser Photoacoustic Analysis of Residual CO2 and H2O in Larch Stems

Biosensors

Boris Ageev²  Yurii Ponomarev²  Valeria Sapozhnikova²  Dmitry Savchuk¹ 

[1] Institute of Monitoring of Climatic and Ecological Systems, Siberian Branch of the Russian Academy of Sciences, 10/3 Academichesky Prospekt, Tomsk 634055, Russia; E-Mail:;V. E. Zuev Institute of Atmospheric Optics, Siberian Branch of the Russian Academy of Sciences, 1 Academician Zuev Square, Tomsk 634021, Russia; E-Mails:

关键词: annual tree rings;    larch;    CO₂;    H₂O;    climate response;   

DOI  :  10.3390/bios5010001

来源: mdpi

【 摘 要 】

Every so often, the results obtained from investigations into the effects of varying environmental conditions on the tree growth rate at the same sites and on the change in the carbon balance in plants, using traditional methods, are found to differ widely. We believe that the reason for the ambiguity of the data has to do with failure to account for the role of the residual CO₂ (and H₂O) in the tree wood exhibiting a climate response. In our earlier work, the results of a laser photoacoustic gas analysis of CO₂ and H₂O vacuum-desorbed from disc tree rings of evergreen conifer trees were presented. In this paper, laser photoacoustic measurements of tree ring gases in deciduous conifer trees and CO₂ carbon isotope composition determined by means of a mass spectrometer are given. Conclusions are made regarding the response of annual larch CO₂ disc tree ring distributions to climatic parameters (temperatures and precipitation). The data about the CO₂ disc content for different sites are compared.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.