DOI: 10.1002/2016GL068782
论文题名: The contribution of an overlooked transport process to a wetland's methane emissions
作者: Poindexter C.M. ; Baldocchi D.D. ; Matthes J.H. ; Knox S.H. ; Variano E.A.
刊名: Geophysical Research Letters
ISSN: 0094-9669
EISSN: 1944-9400
出版年: 2016
卷: 43, 期: 12 起始页码: 6276
结束页码: 6284
语种: 英语
英文关键词: methane
; transport
; wetlands
Scopus关键词: Fluid dynamics
; Heat convection
; Hydrodynamics
; Surface waters
; Wetlands
; Freshwater marshes
; Hydrodynamic transport
; Methane emissions
; Thermal convections
; Transport
; Transport process
; Wetland methane flux
; Wetland surface
; Methane
英文摘要: 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. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84976863747&doi=10.1002%2f2016GL068782&partnerID=40&md5=102db78b26ff7b8fbab25e10b534ba14
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10632
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Civil Engineering, California State University, Sacramento, CA, United States
Recommended Citation:
Poindexter C.M.,Baldocchi D.D.,Matthes J.H.,et al. The contribution of an overlooked transport process to a wetland's methane emissions[J]. Geophysical Research Letters,2016-01-01,43(12).