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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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Comparison of variations in the carbon isotope composition of CO2 desorbed from the tree ring wood of the 300 year old larch with variation in Delta 13C of cellulose (Figure 4 from [11]. Figure 4 [11] was digitized before use).
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biosensors-05-00001-f003: Comparison of variations in the carbon isotope composition of CO2 desorbed from the tree ring wood of the 300 year old larch with variation in Delta 13C of cellulose (Figure 4 from [11]. Figure 4 [11] was digitized before use).

Mentions: We thought it would of interest to compare the results obtained for the isotope composition in the cell-respired CO2 with variations in the cellulose carbon isotope composition [11] and with those for the atmospheric air CO2 [12], Figure 3 and Figure 4. Although the comparison was performed at different scales and for different objects, the results show the same tendency towards annual enrichment in light 12C isotope both of atmospheric air and of the carbon isotope composition of cellulose and desorbed CO2. We wanted to use the illustrations to emphasize the very fact that the same tendency relating to variations in Delta13C was retained in totally different objects.


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

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

Comparison of variations in the carbon isotope composition of CO2 desorbed from the tree ring wood of the 300 year old larch with variation in Delta 13C of cellulose (Figure 4 from [11]. Figure 4 [11] was digitized before use).
© Copyright Policy
Related In: Results  -  Collection

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

biosensors-05-00001-f003: Comparison of variations in the carbon isotope composition of CO2 desorbed from the tree ring wood of the 300 year old larch with variation in Delta 13C of cellulose (Figure 4 from [11]. Figure 4 [11] was digitized before use).
Mentions: We thought it would of interest to compare the results obtained for the isotope composition in the cell-respired CO2 with variations in the cellulose carbon isotope composition [11] and with those for the atmospheric air CO2 [12], Figure 3 and Figure 4. Although the comparison was performed at different scales and for different objects, the results show the same tendency towards annual enrichment in light 12C isotope both of atmospheric air and of the carbon isotope composition of cellulose and desorbed CO2. We wanted to use the illustrations to emphasize the very fact that the same tendency relating to variations in Delta13C was retained in totally different objects.

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