Impacts of leaks and gas accumulation on closed chamber methods for measuring methane and carbon dioxide fluxes from tree stems.
Accurate measurements of methane (CH4) and carbon dioxide (CO2) fluxes from tree stems are important for understanding greenhouse gas emissions. Closed chamber methods are commonly employed for this purpose; however, leaks between the chamber and the atmosphere as well as gas accumulation, known as...
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ftanid:oai:repositorio.anid.cl:10533/70044 2024-06-23T07:47:04+00:00 Impacts of leaks and gas accumulation on closed chamber methods for measuring methane and carbon dioxide fluxes from tree stems. SCIENCE OF THE TOTAL ENVIRONMENT Salas-Rabaza, Julio A. Andrade, Jose Luis Us-Santamaria, Roberth Morales-Rico, Pablo Mayora, Gisela Aguirre, Francisco Javier Fecci-Machuca, Vicente Gade-Palma, Eugenia M. Thalasso, Frederic 2023-12-15 application/pdf https://hdl.handle.net/10533/70044 unknown 10.1016/j.scitotenv.2023.166358 https://www.sciencedirect.com/science/article/pii/S0048969723049835?via%3Dihub FB210018 https://hdl.handle.net/10533/70044 Attribution-NonCommercial-NoDerivs 3.0 Spain http://creativecommons.org/licenses/by-nc-nd/3.0/es/ Articulo 2023 ftanid 2024-06-12T23:30:16Z Accurate measurements of methane (CH4) and carbon dioxide (CO2) fluxes from tree stems are important for understanding greenhouse gas emissions. Closed chamber methods are commonly employed for this purpose; however, leaks between the chamber and the atmosphere as well as gas accumulation, known as the concen tration buildup effect, can impact flux measurements significantly. In this study, we investigated the impacts of concentration buildup and leaks on semi-rigid closed chamber methods. Field measurements were conducted on six tree species, including three species from a Mexican mangrove ecosystem and three species from a Magellanic sub-Antarctic forest. Systematic observations revealed significant leak flow rates, ranging from 0.00 to 465 L h− 1, with a median value of 1.25 ± 75.67 L h− 1. We tested the efficacy of using cement to reduce leaks, achieving a leak flow rate reduction of 46–98 % without complete elimination. Our study also demonstrates a clear and substantial impact of concentration buildup on CH4 flux measurements, while CO2 flux measurements were relatively less affected across all tree species studied. Our results show that the combined effects of leaks and concentration buildup can lead to an underestimation of CH4 emissions by an average of 40 ± 20 % and CO2 emissions by 22 ± 22 %, depending on the bark roughness. Based on these findings, we recall a straightforward yet effective method to minimize experimental errors associated with these phenomena, previously established, and reiterated in the current context, for calculating emissions that considers effects of leaks and concentration buildup, while eliminating the need for separate determinations of these phenomena. Overall, the results, combined with a literature review, suggest that our current estimates of GHG flux from tree stems are currently underestimated. Si We thank the “Consejo Nacional de Ciencia y Tecnología (CONACYT)” for the financial support received (project A3-S-75824), as well as for the support to Julio A. ... Article in Journal/Newspaper Antarc* Antarctic Repositorio ANID (Agencia Nacional de Investigación y Desarrollo) Antarctic |
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Repositorio ANID (Agencia Nacional de Investigación y Desarrollo) |
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Accurate measurements of methane (CH4) and carbon dioxide (CO2) fluxes from tree stems are important for understanding greenhouse gas emissions. Closed chamber methods are commonly employed for this purpose; however, leaks between the chamber and the atmosphere as well as gas accumulation, known as the concen tration buildup effect, can impact flux measurements significantly. In this study, we investigated the impacts of concentration buildup and leaks on semi-rigid closed chamber methods. Field measurements were conducted on six tree species, including three species from a Mexican mangrove ecosystem and three species from a Magellanic sub-Antarctic forest. Systematic observations revealed significant leak flow rates, ranging from 0.00 to 465 L h− 1, with a median value of 1.25 ± 75.67 L h− 1. We tested the efficacy of using cement to reduce leaks, achieving a leak flow rate reduction of 46–98 % without complete elimination. Our study also demonstrates a clear and substantial impact of concentration buildup on CH4 flux measurements, while CO2 flux measurements were relatively less affected across all tree species studied. Our results show that the combined effects of leaks and concentration buildup can lead to an underestimation of CH4 emissions by an average of 40 ± 20 % and CO2 emissions by 22 ± 22 %, depending on the bark roughness. Based on these findings, we recall a straightforward yet effective method to minimize experimental errors associated with these phenomena, previously established, and reiterated in the current context, for calculating emissions that considers effects of leaks and concentration buildup, while eliminating the need for separate determinations of these phenomena. Overall, the results, combined with a literature review, suggest that our current estimates of GHG flux from tree stems are currently underestimated. Si We thank the “Consejo Nacional de Ciencia y Tecnología (CONACYT)” for the financial support received (project A3-S-75824), as well as for the support to Julio A. ... |
format |
Article in Journal/Newspaper |
author |
Salas-Rabaza, Julio A. Andrade, Jose Luis Us-Santamaria, Roberth Morales-Rico, Pablo Mayora, Gisela Aguirre, Francisco Javier Fecci-Machuca, Vicente Gade-Palma, Eugenia M. Thalasso, Frederic |
spellingShingle |
Salas-Rabaza, Julio A. Andrade, Jose Luis Us-Santamaria, Roberth Morales-Rico, Pablo Mayora, Gisela Aguirre, Francisco Javier Fecci-Machuca, Vicente Gade-Palma, Eugenia M. Thalasso, Frederic Impacts of leaks and gas accumulation on closed chamber methods for measuring methane and carbon dioxide fluxes from tree stems. |
author_facet |
Salas-Rabaza, Julio A. Andrade, Jose Luis Us-Santamaria, Roberth Morales-Rico, Pablo Mayora, Gisela Aguirre, Francisco Javier Fecci-Machuca, Vicente Gade-Palma, Eugenia M. Thalasso, Frederic |
author_sort |
Salas-Rabaza, Julio A. |
title |
Impacts of leaks and gas accumulation on closed chamber methods for measuring methane and carbon dioxide fluxes from tree stems. |
title_short |
Impacts of leaks and gas accumulation on closed chamber methods for measuring methane and carbon dioxide fluxes from tree stems. |
title_full |
Impacts of leaks and gas accumulation on closed chamber methods for measuring methane and carbon dioxide fluxes from tree stems. |
title_fullStr |
Impacts of leaks and gas accumulation on closed chamber methods for measuring methane and carbon dioxide fluxes from tree stems. |
title_full_unstemmed |
Impacts of leaks and gas accumulation on closed chamber methods for measuring methane and carbon dioxide fluxes from tree stems. |
title_sort |
impacts of leaks and gas accumulation on closed chamber methods for measuring methane and carbon dioxide fluxes from tree stems. |
publishDate |
2023 |
url |
https://hdl.handle.net/10533/70044 |
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Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
10.1016/j.scitotenv.2023.166358 https://www.sciencedirect.com/science/article/pii/S0048969723049835?via%3Dihub FB210018 https://hdl.handle.net/10533/70044 |
op_rights |
Attribution-NonCommercial-NoDerivs 3.0 Spain http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
_version_ |
1802650593749106688 |