Modeled production, oxidation, and transport processes of wetland methane emissions in temperate, boreal, and Arctic regions
Wetlands are the largest natural source of methane (CH4) to the atmosphere. The eddy covariance method provides robust measurements of net ecosystem exchange of CH4, but interpreting its spatiotemporal variations is challenging due to the co-occurrence of CH4 production, oxidation, and transport dyn...
Published in: | Global Change Biology |
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John Wiley & Sons Ltd
2024
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Online Access: | https://erepo.uef.fi/handle/123456789/31213 |
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ftuniveasternfin:oai:erepo.uef.fi:123456789/31213 2024-02-11T10:01:10+01:00 Modeled production, oxidation, and transport processes of wetland methane emissions in temperate, boreal, and Arctic regions Ueyama, Masahito Knox, Sara H Delwiche, Kyle B Bansal, Sheel Riley, William J Baldocchi, Dennis Hirano, Takashi McNicol, Gavin Schafer, Karina Windham‐Myers, Lisamarie Poulter, Benjamin Jackson, Robert B Chang, Kuang‐Yu Chen, Jiquen Chu, Housen Desai, Ankur R Gogo, Sébastien Iwata, Hiroki Kang, Minseok Mammarella, Ivan Peichl, Matthias Sonnentag, Oliver Tuittila, Eeva‐Stiina Ryu, Youngryel Euskirchen, Eugénie S. Göckede, Mathias Jacotot, Adrien Nilsson, Mats B. Sachs, Torsten Metsätieteiden osasto 2024-01-16T10:48:23Z 2313-2334 https://erepo.uef.fi/handle/123456789/31213 eng eng John Wiley & Sons Ltd Global change biology https://doi.org/10.1111/gcb.16594 10.1111/gcb.16594 1354-1013 8 29 https://erepo.uef.fi/handle/123456789/31213 In copyright 1.0 openAccess © 2023 John Wiley & Sons Ltd https://rightsstatements.org/page/InC/1.0/ Bayesian optimization data-model fusion Eddy covariance methane emissions methane model multi-site synthesis A1 Artikkeli Article 2024 ftuniveasternfin https://doi.org/10.1111/gcb.16594 2024-01-18T00:02:26Z Wetlands are the largest natural source of methane (CH4) to the atmosphere. The eddy covariance method provides robust measurements of net ecosystem exchange of CH4, but interpreting its spatiotemporal variations is challenging due to the co-occurrence of CH4 production, oxidation, and transport dynamics. Here, we estimate these three processes using a data-model fusion approach across 25 wetlands in temperate, boreal, and Arctic regions. Our data-constrained model—iPEACE—reasonably reproduced CH4 emissions at 19 of the 25 sites with normalized root mean square error of 0.59, correlation coefficient of 0.82, and normalized standard deviation of 0.87. Among the three processes, CH4 production appeared to be the most important process, followed by oxidation in explaining inter-site variations in CH4 emissions. Based on a sensitivity analysis, CH4 emissions were generally more sensitive to decreased water table than to increased gross primary productivity or soil temperature. For periods with leaf area index (LAI) of ≥20% of its annual peak, plant-mediated transport appeared to be the major pathway for CH4 transport. Contributions from ebullition and diffusion were relatively high during low LAI (<20%) periods. The lag time between CH4 production and CH4 emissions tended to be short in fen sites (3 ± 2 days) and long in bog sites (13 ± 10 days). Based on a principal component analysis, we found that parameters for CH4 production, plant-mediated transport, and diffusion through water explained 77% of the variance in the parameters across the 19 sites, highlighting the importance of these parameters for predicting wetland CH4 emissions across biomes. These processes and associated parameters for CH4 emissions among and within the wetlands provide useful insights for interpreting observed net CH4 fluxes, estimating sensitivities to biophysical variables, and modeling global CH4 fluxes. final draft peerReviewed Article in Journal/Newspaper Arctic UEF eRepository (University of Eastern Finland) Arctic Global Change Biology 29 8 2313 2334 |
institution |
Open Polar |
collection |
UEF eRepository (University of Eastern Finland) |
op_collection_id |
ftuniveasternfin |
language |
English |
topic |
Bayesian optimization data-model fusion Eddy covariance methane emissions methane model multi-site synthesis |
spellingShingle |
Bayesian optimization data-model fusion Eddy covariance methane emissions methane model multi-site synthesis Ueyama, Masahito Knox, Sara H Delwiche, Kyle B Bansal, Sheel Riley, William J Baldocchi, Dennis Hirano, Takashi McNicol, Gavin Schafer, Karina Windham‐Myers, Lisamarie Poulter, Benjamin Jackson, Robert B Chang, Kuang‐Yu Chen, Jiquen Chu, Housen Desai, Ankur R Gogo, Sébastien Iwata, Hiroki Kang, Minseok Mammarella, Ivan Peichl, Matthias Sonnentag, Oliver Tuittila, Eeva‐Stiina Ryu, Youngryel Euskirchen, Eugénie S. Göckede, Mathias Jacotot, Adrien Nilsson, Mats B. Sachs, Torsten Modeled production, oxidation, and transport processes of wetland methane emissions in temperate, boreal, and Arctic regions |
topic_facet |
Bayesian optimization data-model fusion Eddy covariance methane emissions methane model multi-site synthesis |
description |
Wetlands are the largest natural source of methane (CH4) to the atmosphere. The eddy covariance method provides robust measurements of net ecosystem exchange of CH4, but interpreting its spatiotemporal variations is challenging due to the co-occurrence of CH4 production, oxidation, and transport dynamics. Here, we estimate these three processes using a data-model fusion approach across 25 wetlands in temperate, boreal, and Arctic regions. Our data-constrained model—iPEACE—reasonably reproduced CH4 emissions at 19 of the 25 sites with normalized root mean square error of 0.59, correlation coefficient of 0.82, and normalized standard deviation of 0.87. Among the three processes, CH4 production appeared to be the most important process, followed by oxidation in explaining inter-site variations in CH4 emissions. Based on a sensitivity analysis, CH4 emissions were generally more sensitive to decreased water table than to increased gross primary productivity or soil temperature. For periods with leaf area index (LAI) of ≥20% of its annual peak, plant-mediated transport appeared to be the major pathway for CH4 transport. Contributions from ebullition and diffusion were relatively high during low LAI (<20%) periods. The lag time between CH4 production and CH4 emissions tended to be short in fen sites (3 ± 2 days) and long in bog sites (13 ± 10 days). Based on a principal component analysis, we found that parameters for CH4 production, plant-mediated transport, and diffusion through water explained 77% of the variance in the parameters across the 19 sites, highlighting the importance of these parameters for predicting wetland CH4 emissions across biomes. These processes and associated parameters for CH4 emissions among and within the wetlands provide useful insights for interpreting observed net CH4 fluxes, estimating sensitivities to biophysical variables, and modeling global CH4 fluxes. final draft peerReviewed |
author2 |
Metsätieteiden osasto |
format |
Article in Journal/Newspaper |
author |
Ueyama, Masahito Knox, Sara H Delwiche, Kyle B Bansal, Sheel Riley, William J Baldocchi, Dennis Hirano, Takashi McNicol, Gavin Schafer, Karina Windham‐Myers, Lisamarie Poulter, Benjamin Jackson, Robert B Chang, Kuang‐Yu Chen, Jiquen Chu, Housen Desai, Ankur R Gogo, Sébastien Iwata, Hiroki Kang, Minseok Mammarella, Ivan Peichl, Matthias Sonnentag, Oliver Tuittila, Eeva‐Stiina Ryu, Youngryel Euskirchen, Eugénie S. Göckede, Mathias Jacotot, Adrien Nilsson, Mats B. Sachs, Torsten |
author_facet |
Ueyama, Masahito Knox, Sara H Delwiche, Kyle B Bansal, Sheel Riley, William J Baldocchi, Dennis Hirano, Takashi McNicol, Gavin Schafer, Karina Windham‐Myers, Lisamarie Poulter, Benjamin Jackson, Robert B Chang, Kuang‐Yu Chen, Jiquen Chu, Housen Desai, Ankur R Gogo, Sébastien Iwata, Hiroki Kang, Minseok Mammarella, Ivan Peichl, Matthias Sonnentag, Oliver Tuittila, Eeva‐Stiina Ryu, Youngryel Euskirchen, Eugénie S. Göckede, Mathias Jacotot, Adrien Nilsson, Mats B. Sachs, Torsten |
author_sort |
Ueyama, Masahito |
title |
Modeled production, oxidation, and transport processes of wetland methane emissions in temperate, boreal, and Arctic regions |
title_short |
Modeled production, oxidation, and transport processes of wetland methane emissions in temperate, boreal, and Arctic regions |
title_full |
Modeled production, oxidation, and transport processes of wetland methane emissions in temperate, boreal, and Arctic regions |
title_fullStr |
Modeled production, oxidation, and transport processes of wetland methane emissions in temperate, boreal, and Arctic regions |
title_full_unstemmed |
Modeled production, oxidation, and transport processes of wetland methane emissions in temperate, boreal, and Arctic regions |
title_sort |
modeled production, oxidation, and transport processes of wetland methane emissions in temperate, boreal, and arctic regions |
publisher |
John Wiley & Sons Ltd |
publishDate |
2024 |
url |
https://erepo.uef.fi/handle/123456789/31213 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
Global change biology https://doi.org/10.1111/gcb.16594 10.1111/gcb.16594 1354-1013 8 29 https://erepo.uef.fi/handle/123456789/31213 |
op_rights |
In copyright 1.0 openAccess © 2023 John Wiley & Sons Ltd https://rightsstatements.org/page/InC/1.0/ |
op_doi |
https://doi.org/10.1111/gcb.16594 |
container_title |
Global Change Biology |
container_volume |
29 |
container_issue |
8 |
container_start_page |
2313 |
op_container_end_page |
2334 |
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1790596927192039424 |