DOI: 10.1038/s41561-017-0003-6
论文题名: Potential links between continental rifting, CO2 degassing and climate change through time
作者: Brune S. ; Williams S.E. ; Müller R.D.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2017
卷: 10, 期: 12 起始页码: 941
结束页码: 946
语种: 英语
Scopus关键词: carbon cycle
; carbon dioxide
; carbon emission
; carbon flux
; Cenozoic
; climate change
; concentration (composition)
; degassing
; Mesozoic
; rifting
; spatiotemporal analysis
英文摘要: The concentration of CO2 in the atmosphere is a key influence on Earth's climate. Today, significant quantities of CO2 are emitted at continental rifts, suggesting that the spatial and temporal extent of rift systems may have influenced deep carbon fluxes and thus climate change throughout geological time. Here we test this hypothesis by conducting a worldwide census of continental rift lengths over the last 200 million years. We estimate tectonic CO2 release rates through time and show that along the extensive Mesozoic and Cenozoic rift systems, rift-related CO2 degassing rates reached more than 300% of present-day values. Using a numerical carbon cycle model, we find that two prominent periods of enhanced rifting 160 to 100 million years ago and after 55 million years ago coincided with greenhouse climate episodes, during which atmospheric CO2 concentrations were more than three times higher than today. We therefore propose that continental fragmentation and long-term climate change could plausibly be linked via massive CO2 degassing in rift systems. © 2017 The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/105662
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: GFZ German Research Centre for Geosciences, Potsdam, Germany; Institute of Earth and Environmental Science, University of Potsdam, Potsdam-Golm, Germany; EarthByte Group, School of Geosciences, University of Sydney, Sydney, NSW, Australia; Sydney Informatics Hub, University of Sydney, Sydney, NSW, Australia
Recommended Citation:
Brune S.,Williams S.E.,Müller R.D.. Potential links between continental rifting, CO2 degassing and climate change through time[J]. Nature Geoscience,2017-01-01,10(12)