| DOI: | 10.1002/2015GL064480
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| 论文题名: | The continental drift convection cell |
| 作者: | Whitehead J.A.; Behn M.D.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9498
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| EISSN: | 1944-9229
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| 出版年: | 2015
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| 卷: | 42, 期:11 | | 起始页码: | 4301
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| 结束页码: | 4308
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| 语种: | 英语
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| 英文关键词: | cellular convection
; continental drift
; oscillation
; subduction
; Wilson cycle
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| Scopus关键词: | Numerical models
; Structural geology
; Continental drift
; Core-mantle boundary
; Infinite Prandtl number
; Mantle temperatures
; oscillation
; Stress-free surfaces
; subduction
; Wilson cycle
; Prandtl number
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| 英文摘要: | Continents on Earth periodically assemble to form supercontinents and then break up again into smaller continental blocks (the Wilson cycle). Previous highly developed numerical models incorporate fixed continents while others indicate that continent movement modulates flow. Our simplified numerical model suggests that continental drift is fundamental. A thermally insulating continent is anchored at its center to mantle flow on an otherwise stress-free surface for infinite Prandtl number cellular convection with constant material properties. Rayleigh numbers exceed 107, while continent widths and chamber lengths approach Earth's values. The Wilson cycle is reproduced by a unique, rugged monopolar "continental drift convection cell." Subduction occurs at the cell's upstream end with cold slabs dipping at an angle beneath the moving continent (as found in many continent/subduction regions on Earth). Drift enhances vertical heat transport up to 30%, especially at the core-mantle boundary, and greatly decreases lateral mantle temperature differences. ©2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84934326270&doi=10.1002%2f2015GL064480&partnerID=40&md5=fca774cf6f3eaa193ccde236fc2cec88
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/9113
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| 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 Physical Oceanography, Woods Hole Oceanographic Institution, Woods Hole, MA, United States
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| Recommended Citation: | |
Whitehead J.A.,Behn M.D.. The continental drift convection cell[J]. Geophysical Research Letters,2015-01-01,42(11).
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