DOI: 10.1002/2016GL069676
论文题名: Mechanistic insights into a hydrate contribution to the Paleocene-Eocene carbon cycle perturbation from coupled thermohydraulic simulations
作者: Minshull T.A. ; Marín-Moreno H. ; Armstrong McKay D.I. ; Wilson P.A.
刊名: Geophysical Research Letters
ISSN: 0094-8771
EISSN: 1944-8502
出版年: 2016
卷: 43, 期: 16 起始页码: 8637
结束页码: 8644
语种: 英语
英文关键词: hydrate
; methane
; PETM
Scopus关键词: Dissociation
; Hydrates
; Hydration
; Isotopes
; Methane
; Carbon isotope excursions
; Hydrate dissociation
; Isotopic mass balance
; Methane hydrate dissociation
; Paleocene-eocene thermal maximums
; PETM
; Thermo-hydraulic model
; Thermo-hydraulic simulations
; Gas hydrates
英文摘要: During the Paleocene-Eocene Thermal Maximum (PETM), the carbon isotopic signature (δ13C) of surface carbon-bearing phases decreased abruptly by at least 2.5 to 3.0‰. This carbon isotope excursion (CIE) has been attributed to widespread methane hydrate dissociation in response to rapid ocean warming. We ran a thermohydraulic modeling code to simulate hydrate dissociation due to ocean warming for various PETM scenarios. Our results show that hydrate dissociation in response to such warming can be rapid but suggest that methane release to the ocean is modest and delayed by hundreds to thousands of years after the onset of dissociation, limiting the potential for positive feedback from emission-induced warming. In all of our simulations at least half of the dissociated hydrate methane remains beneath the seabed, suggesting that the pre-PETM hydrate inventory needed to account for all of the CIE is at least double that required for isotopic mass balance. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84987720529&doi=10.1002%2f2016GL069676&partnerID=40&md5=e5fd645aedce2643dfc601983e5f8684
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9734
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: National Oceanography Centre Southampton, University of Southampton, Southampton, United Kingdom
Recommended Citation:
Minshull T.A.,Marín-Moreno H.,Armstrong McKay D.I.,et al. Mechanistic insights into a hydrate contribution to the Paleocene-Eocene carbon cycle perturbation from coupled thermohydraulic simulations[J]. Geophysical Research Letters,2016-01-01,43(16).