| DOI: | 10.1002/2016GL068912
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| 论文题名: | Analysis of a Precambrian resonance-stabilized day length |
| 作者: | Bartlett B.C.; Stevenson D.J.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8989
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| EISSN: | 1944-8720
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| 出版年: | 2016
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| 卷: | 43, 期:11 | | 起始页码: | 5716
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| 结束页码: | 5724
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| 语种: | 英语
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| 英文关键词: | length of day
; snowball Earth
; tides
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| Scopus关键词: | Glacial geology
; Tides
; Computational model
; Deglaciations
; Length of days
; Most likely
; Precambrian
; Resonant effect
; Snowball Earth
; Thermal tide
; Resonance
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| 英文摘要: | During the Precambrian era, Earth's decelerating rotation would have passed a 21 h period that would have been resonant with the semidiurnal atmospheric thermal tide. Near this point, the atmospheric torque would have been maximized, being comparable in magnitude but opposite in direction to the lunar torque, halting Earth's rotational deceleration, maintaining a constant day length, as detailed by Zahnle and Walker (1987). We develop a computational model to determine necessary conditions for formation and breakage of this resonant effect. Our simulations show the resonance to be resilient to atmospheric thermal noise but suggest a sudden atmospheric temperature increase like the deglaciation period following a possible “snowball Earth” near the end of the Precambrian would break this resonance; the Marinoan and Sturtian glaciations seem the most likely candidates for this event. Our model provides a simulated day length over time that resembles existing paleorotational data, though further data are needed to verify this hypothesis. ©2016. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84976876662&doi=10.1002%2f2016GL068912&partnerID=40&md5=06a61c86ec261d1c143ea29f6a21d7c0
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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/9952
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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: | California Institute of Technology, Pasadena, CA, United States
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| Recommended Citation: | |
Bartlett B.C.,Stevenson D.J.. Analysis of a Precambrian resonance-stabilized day length[J]. Geophysical Research Letters,2016-01-01,43(11).
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