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A laser photoacoustic analysis of residual CO₂ and H₂O in larch stems.

Ageev B, Ponomarev Y, Sapozhnikova V, Savchuk D - Biosensors (Basel) (2014)

Bottom Line: 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.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.

View Article: PubMed Central - PubMed

Affiliation: Zuev Institute of Atmospheric Optics, Siberian Branch of the Russian Academy of Sciences, 1 Academician Zuev Square, Tomsk 634021, Russia. ageev@asd.iao.ru.

ABSTRACT
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.

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Superposition of long-term cyclicity on short-term cycles of the annual CO2 distribution in the disc tree rings of the 300 year old larch.
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biosensors-05-00001-f008: Superposition of long-term cyclicity on short-term cycles of the annual CO2 distribution in the disc tree rings of the 300 year old larch.

Mentions: We have analyzed the measurement results for CO2 vacuum-desorbed from the tree rings since 1830 to find out whether the measurements showed the existence of cyclic CO2 variations. The results of Fourier analysis of the tree ring CO2 variations (1840–1935) with the use of the ORIGIN software are shown in Figure 7. Similar to the results obtained from investigations into the tree ring CO2 distribution in the Siberian stone pine [7,8], the tree ring CO2 stored in the larch disc exhibits 2-, 4-year, and higher-order cycles. To provide a more graphic illustration of the foregoing effect, we have used polynomials to approximate the tree ring CO2 distribution data collected in 1840–1935. The polynomial approximation of the CO2 tree ring distributions obtained since 1830 has emphasized ~50-year long-term cycles (Figure 8) and a tendency towards disc tree ring CO2 rise for the last years attributable to atmospheric CO2 rise [13]. These cycles (~50 year) are difficult to distinguish by the ORIGIN software.


A laser photoacoustic analysis of residual CO₂ and H₂O in larch stems.

Ageev B, Ponomarev Y, Sapozhnikova V, Savchuk D - Biosensors (Basel) (2014)

Superposition of long-term cyclicity on short-term cycles of the annual CO2 distribution in the disc tree rings of the 300 year old larch.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4384077&req=5

biosensors-05-00001-f008: Superposition of long-term cyclicity on short-term cycles of the annual CO2 distribution in the disc tree rings of the 300 year old larch.
Mentions: We have analyzed the measurement results for CO2 vacuum-desorbed from the tree rings since 1830 to find out whether the measurements showed the existence of cyclic CO2 variations. The results of Fourier analysis of the tree ring CO2 variations (1840–1935) with the use of the ORIGIN software are shown in Figure 7. Similar to the results obtained from investigations into the tree ring CO2 distribution in the Siberian stone pine [7,8], the tree ring CO2 stored in the larch disc exhibits 2-, 4-year, and higher-order cycles. To provide a more graphic illustration of the foregoing effect, we have used polynomials to approximate the tree ring CO2 distribution data collected in 1840–1935. The polynomial approximation of the CO2 tree ring distributions obtained since 1830 has emphasized ~50-year long-term cycles (Figure 8) and a tendency towards disc tree ring CO2 rise for the last years attributable to atmospheric CO2 rise [13]. These cycles (~50 year) are difficult to distinguish by the ORIGIN software.

Bottom Line: 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.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.

View Article: PubMed Central - PubMed

Affiliation: Zuev Institute of Atmospheric Optics, Siberian Branch of the Russian Academy of Sciences, 1 Academician Zuev Square, Tomsk 634021, Russia. ageev@asd.iao.ru.

ABSTRACT
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.

Show MeSH
Related in: MedlinePlus