Next Article in Journal
A FDR Sensor for Measuring Complex Soil Dielectric Permittivity in the 10–500 MHz Frequency Range
Next Article in Special Issue
Structures and Encapsulation Motifs of Functional Molecules Probed by Laser Spectroscopic and Theoretical Methods
Previous Article in Journal
GFZ Wireless Seismic Array (GFZ-WISE), a Wireless Mesh Network of Seismic Sensors: New Perspectives for Seismic Noise Array Investigations and Site Monitoring
Previous Article in Special Issue
Discriminant Analysis of Raman Spectra for Body Fluid Identification for Forensic Purposes
Sensors 2010, 10(4), 3305-3313; doi:10.3390/s100403305
Communication

Laser Photoacoustic Detection of CO2 in Old Disc Tree-Rings

,
 and *
Received: 29 December 2009; in revised form: 16 February 2010 / Accepted: 6 March 2010 / Published: 4 April 2010
(This article belongs to the Special Issue Laser Spectroscopy and Sensing)
View Full-Text   |   Download PDF [315 KB, uploaded 21 June 2014]   |   Browse Figures
Abstract: A homemade CO2–laser photoacoustic spectrometer has been used for monitoring CO2 in gas samples extracted under vacuum from the wood of old spruce disc tree-rings for a ~60 year series. The experimental results show that (1) the CO2 concentration exhibits annual trends correlated with an increase in atmospheric CO2 in a number of cases; (2) at the time when the annual CO2 trend changes from positive to negative, the annual tree-ring stable carbon isotope ratios (δ13C) of CO2 change as well; (3) the disc tree-ring widths are observed to decrease in most cases where the annual CO2 increased; (4) simultaneously with the annual CO2 variation, annual H2O distribution was detected in gas samples of the wood tree-rings of one spruce disc. The observed patterns of the annual CO2 distribution in the disc tree-rings are assumed to be the evidence of the impact of the atmospheric CO2 increase. In other words, a change in the concentration gradient between the stem and the atmospheric CO2 may lead to a gradual CO2 accumulation in the stem because of a decrease in the diffusion rate and to a change in the tree parameters.
Keywords: laser photoacoustic gas analysis; carbon dioxide; tree-rings; H2O laser photoacoustic gas analysis; carbon dioxide; tree-rings; H2O
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Export to BibTeX |
EndNote


MDPI and ACS Style

Ageev, B.; Ponomarev, Y.; Sapozhnikova, V. Laser Photoacoustic Detection of CO2 in Old Disc Tree-Rings. Sensors 2010, 10, 3305-3313.

AMA Style

Ageev B, Ponomarev Y, Sapozhnikova V. Laser Photoacoustic Detection of CO2 in Old Disc Tree-Rings. Sensors. 2010; 10(4):3305-3313.

Chicago/Turabian Style

Ageev, Boris; Ponomarev, Yurii; Sapozhnikova, Valeria. 2010. "Laser Photoacoustic Detection of CO2 in Old Disc Tree-Rings." Sensors 10, no. 4: 3305-3313.


Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert