DOI: 10.1002/2014GB005011
Scopus记录号: 2-s2.0-85027928355
论文题名: Modeling the fate of methane hydrates under global warming
作者: Kretschmer K ; , Biastoch A ; , Rüpke L ; , Burwicz E
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2015
卷: 29, 期: 5 起始页码: 610
结束页码: 625
语种: 英语
英文关键词: climate change
; gas hydrates
; global estimates
; methane
Scopus关键词: climate modeling
; gas hydrate
; global climate
; global warming
; oceanic circulation
; transfer function
; water temperature
; South Carolina
; United States
英文摘要: Large amounts of methane hydrate locked up within marine sediments are vulnerable to climate change. Changes in bottom water temperatures may lead to their destabilization and the release of methane into the water column or even the atmosphere. In a multimodel approach, the possible impact of destabilizing methane hydrates onto global climate within the next century is evaluated. The focus is set on changing bottom water temperatures to infer the response of the global methane hydrate inventory to future climate change. Present and future bottom water temperatures are evaluated by the combined use of hindcast high-resolution ocean circulation simulations and climate modeling for the next century. The changing global hydrate inventory is computed using the parameterized transfer function recently proposed by Wallmann et al. (2012). We find that the present-day world's total marine methane hydrate inventory is estimated to be 1146 Gt of methane carbon. Within the next 100 years this global inventory may be reduced by ∼0.03% (releasing ∼473 Mt methane from the seafloor). Compared to the present-day annual emissions of anthropogenic methane, the amount of methane released from melting hydrates by 2100 is small and will not have a major impact on the global climate. On a regional scale, ocean bottom warming over the next 100 years will result in a relatively large decrease in the methane hydrate deposits, with the Arctic and Blake Ridge region, offshore South Carolina, being most affected. ©2015. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77981
Appears in Collections: 气候变化事实与影响
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作者单位: GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany; MARUM - Center for Marine Environmental Sciences, Faculty of Geosciences, University of Bremen, Bremen, Germany
Recommended Citation:
Kretschmer K,, Biastoch A,, Rüpke L,et al. Modeling the fate of methane hydrates under global warming[J]. Global Biogeochemical Cycles,2015-01-01,29(5)