DOI: 10.1002/2016GL070049
论文题名: Overestimating climate warming-induced methane gas escape from the seafloor by neglecting multiphase flow dynamics
作者: Stranne C. ; O'Regan M. ; Jakobsson M.
刊名: Geophysical Research Letters
ISSN: 0094-8718
EISSN: 1944-8449
出版年: 2016
卷: 43, 期: 16 起始页码: 8703
结束页码: 8712
语种: 英语
英文关键词: clathrate
; hydrate
; hydrate dissociation
; methane
; methane release
; TOUGH + hydrate
Scopus关键词: Climate change
; Dissociation
; Hydrates
; Hydration
; Methane
; Multiphase flow
; Seepage
; Clathrate
; Dissociation rates
; Feedback mechanisms
; Hydrate dissociation
; Hydrate stabilities
; Methane release
; Multi-phase flow models
; Orders of magnitude
; Gas hydrates
英文摘要: Continental margins host large quantities of methane stored partly as hydrates in sediments. Release of methane through hydrate dissociation is implicated as a possible feedback mechanism to climate change. Large-scale estimates of future warming-induced methane release are commonly based on a hydrate stability approach that omits dynamic processes. Here we use the multiphase flow model TOUGH + hydrate (T + H) to quantitatively investigate how dynamic processes affect dissociation rates and methane release. The simulations involve shallow, 20–100 m thick hydrate deposits, forced by a bottom water temperature increase of 0.03°C yr−1 over 100 years. We show that on a centennial time scale, the hydrate stability approach can overestimate gas escape quantities by orders of magnitude. Our results indicate a time lag of > 40 years between the onset of warming and gas escape, meaning that recent climate warming may soon be manifested as widespread gas seepages along the world's continental margins. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84983753036&doi=10.1002%2f2016GL070049&partnerID=40&md5=63cb22e7d3a35540ff37d01cc0ecc3ae
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9681
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 Geological Sciences, Stockholm University, Stockholm, Sweden
Recommended Citation:
Stranne C.,O'Regan M.,Jakobsson M.. Overestimating climate warming-induced methane gas escape from the seafloor by neglecting multiphase flow dynamics[J]. Geophysical Research Letters,2016-01-01,43(16).