Assessment of the soil CO<inf>2</inf> gradient method for soil CO<inf>2</inf> efflux measurements: Comparison of six models in the calculation of the relative gas diffusion coefficient

This paper uses a refined soil gradient method to estimate soil CO2 efflux. Six different models are used to determine the relative gas diffusion coefficient (ξ). A weighted harmonic averaging is used to estimate the soil CO2 diffusion coefficient, yielding a better estimate of soil CO2 efflux. The...

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Main Authors: Natchaya Pingintha, Monique Y. Leclerc, John P. Beasley, Gengsheng Zhang, Chuckree Senthong
Format: Journal
Published: 2018
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/50747
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-507472018-09-04T04:45:02Z Assessment of the soil CO<inf>2</inf> gradient method for soil CO<inf>2</inf> efflux measurements: Comparison of six models in the calculation of the relative gas diffusion coefficient Natchaya Pingintha Monique Y. Leclerc John P. Beasley Gengsheng Zhang Chuckree Senthong Earth and Planetary Sciences This paper uses a refined soil gradient method to estimate soil CO2 efflux. Six different models are used to determine the relative gas diffusion coefficient (ξ). A weighted harmonic averaging is used to estimate the soil CO2 diffusion coefficient, yielding a better estimate of soil CO2 efflux. The resulting soil CO2 efflux results are then compared to the soil CO2 efflux measured with a soil chamber. Depending on the choice of ξ model used, the estimated soil CO2 efflux using the gradient method reasonably approximates the efflux obtained using the soil chamber method. In addition, the estimated soil CO2 efflux obtained by this improved method is well described by an exponential function of soil temperature at a depth of 0.05 m with the temperature sensitivity (Q10) of 1.81 and a linear function of soil moisture at a depth of 0.12 m, in general agreement with previous findings. These results suggest that the gradient method is a practical cost-effective means to measure soil CO2 emissions. Results from the present study suggest that the gradient method can be used successfully to measure soil CO2 efflux provided that proper attention is paid to the judicious use of the proper diffusion coefficient. © 2009 The University of Georgia Journal compilation © 2010 Blackwell Munksgaard. 2018-09-04T04:45:02Z 2018-09-04T04:45:02Z 2010-02-01 Journal 16000889 02806509 2-s2.0-77950466586 10.1111/j.1600-0889.2009.00445.x https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=77950466586&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/50747
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Earth and Planetary Sciences
spellingShingle Earth and Planetary Sciences
Natchaya Pingintha
Monique Y. Leclerc
John P. Beasley
Gengsheng Zhang
Chuckree Senthong
Assessment of the soil CO<inf>2</inf> gradient method for soil CO<inf>2</inf> efflux measurements: Comparison of six models in the calculation of the relative gas diffusion coefficient
description This paper uses a refined soil gradient method to estimate soil CO2 efflux. Six different models are used to determine the relative gas diffusion coefficient (ξ). A weighted harmonic averaging is used to estimate the soil CO2 diffusion coefficient, yielding a better estimate of soil CO2 efflux. The resulting soil CO2 efflux results are then compared to the soil CO2 efflux measured with a soil chamber. Depending on the choice of ξ model used, the estimated soil CO2 efflux using the gradient method reasonably approximates the efflux obtained using the soil chamber method. In addition, the estimated soil CO2 efflux obtained by this improved method is well described by an exponential function of soil temperature at a depth of 0.05 m with the temperature sensitivity (Q10) of 1.81 and a linear function of soil moisture at a depth of 0.12 m, in general agreement with previous findings. These results suggest that the gradient method is a practical cost-effective means to measure soil CO2 emissions. Results from the present study suggest that the gradient method can be used successfully to measure soil CO2 efflux provided that proper attention is paid to the judicious use of the proper diffusion coefficient. © 2009 The University of Georgia Journal compilation © 2010 Blackwell Munksgaard.
format Journal
author Natchaya Pingintha
Monique Y. Leclerc
John P. Beasley
Gengsheng Zhang
Chuckree Senthong
author_facet Natchaya Pingintha
Monique Y. Leclerc
John P. Beasley
Gengsheng Zhang
Chuckree Senthong
author_sort Natchaya Pingintha
title Assessment of the soil CO<inf>2</inf> gradient method for soil CO<inf>2</inf> efflux measurements: Comparison of six models in the calculation of the relative gas diffusion coefficient
title_short Assessment of the soil CO<inf>2</inf> gradient method for soil CO<inf>2</inf> efflux measurements: Comparison of six models in the calculation of the relative gas diffusion coefficient
title_full Assessment of the soil CO<inf>2</inf> gradient method for soil CO<inf>2</inf> efflux measurements: Comparison of six models in the calculation of the relative gas diffusion coefficient
title_fullStr Assessment of the soil CO<inf>2</inf> gradient method for soil CO<inf>2</inf> efflux measurements: Comparison of six models in the calculation of the relative gas diffusion coefficient
title_full_unstemmed Assessment of the soil CO<inf>2</inf> gradient method for soil CO<inf>2</inf> efflux measurements: Comparison of six models in the calculation of the relative gas diffusion coefficient
title_sort assessment of the soil co<inf>2</inf> gradient method for soil co<inf>2</inf> efflux measurements: comparison of six models in the calculation of the relative gas diffusion coefficient
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=77950466586&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/50747
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