The contribution of an overlooked transport process to a wetland's methane emissions
Abstract Wetland methane transport processes affect what portion of methane produced in wetlands reaches the atmosphere. We model what has been perceived to be the least important of these transport processes: hydrodynamic transport of methane through wetland surface water and show that its contribu...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2016-06-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1002/2016GL068782 |
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| author | Cristina M. Poindexter Dennis D. Baldocchi Jaclyn Hatala Matthes Sara Helen Knox Evan A. Variano |
| author_facet | Cristina M. Poindexter Dennis D. Baldocchi Jaclyn Hatala Matthes Sara Helen Knox Evan A. Variano |
| author_sort | Cristina M. Poindexter |
| collection | DOAJ |
| description | Abstract Wetland methane transport processes affect what portion of methane produced in wetlands reaches the atmosphere. We model what has been perceived to be the least important of these transport processes: hydrodynamic transport of methane through wetland surface water and show that its contribution to total methane emissions from a temperate freshwater marsh is surprisingly large. In our 1 year study, hydrodynamic transport comprised more than half of nighttime methane fluxes and was driven primarily by water column thermal convection occurring overnight as the water surface cooled. Overall, hydrodynamic transport was responsible for 32% of annual methane emissions. Many methane models have overlooked this process, but our results show that wetland methane fluxes cannot always be accurately described using only other transport processes (plant‐mediated transport and ebullition). Modifying models to include hydrodynamic transport and the mechanisms that drive it, particularly convection, could help improve predictions of future wetland methane emissions. |
| format | Article |
| id | doaj-art-a6edf22a746147a5bd4219bb953584b9 |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2016-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-a6edf22a746147a5bd4219bb953584b92025-08-20T02:31:39ZengWileyGeophysical Research Letters0094-82761944-80072016-06-0143126276628410.1002/2016GL068782The contribution of an overlooked transport process to a wetland's methane emissionsCristina M. Poindexter0Dennis D. Baldocchi1Jaclyn Hatala Matthes2Sara Helen Knox3Evan A. Variano4Department of Civil Engineering California State University Sacramento California USAEcosystem Science Division, Department of Environmental Science, Policy, and Management University of California Berkeley California USADepartment of Geography Dartmouth College Hanover New Hampshire USAEcosystem Science Division, Department of Environmental Science, Policy, and Management University of California Berkeley California USADepartment of Civil and Environmental Engineering University of California Berkeley California USAAbstract Wetland methane transport processes affect what portion of methane produced in wetlands reaches the atmosphere. We model what has been perceived to be the least important of these transport processes: hydrodynamic transport of methane through wetland surface water and show that its contribution to total methane emissions from a temperate freshwater marsh is surprisingly large. In our 1 year study, hydrodynamic transport comprised more than half of nighttime methane fluxes and was driven primarily by water column thermal convection occurring overnight as the water surface cooled. Overall, hydrodynamic transport was responsible for 32% of annual methane emissions. Many methane models have overlooked this process, but our results show that wetland methane fluxes cannot always be accurately described using only other transport processes (plant‐mediated transport and ebullition). Modifying models to include hydrodynamic transport and the mechanisms that drive it, particularly convection, could help improve predictions of future wetland methane emissions.https://doi.org/10.1002/2016GL068782methanewetlandstransport |
| spellingShingle | Cristina M. Poindexter Dennis D. Baldocchi Jaclyn Hatala Matthes Sara Helen Knox Evan A. Variano The contribution of an overlooked transport process to a wetland's methane emissions Geophysical Research Letters methane wetlands transport |
| title | The contribution of an overlooked transport process to a wetland's methane emissions |
| title_full | The contribution of an overlooked transport process to a wetland's methane emissions |
| title_fullStr | The contribution of an overlooked transport process to a wetland's methane emissions |
| title_full_unstemmed | The contribution of an overlooked transport process to a wetland's methane emissions |
| title_short | The contribution of an overlooked transport process to a wetland's methane emissions |
| title_sort | contribution of an overlooked transport process to a wetland s methane emissions |
| topic | methane wetlands transport |
| url | https://doi.org/10.1002/2016GL068782 |
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