Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-019-04679-3 |
The middle Pleistocene transition by frequency locking and slow ramping of internal period | |
Nyman, Karl H. M.; Ditlevsen, Peter D. | |
2019-09-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2019 |
卷号 | 53页码:3023-3038 |
文章类型 | Article |
语种 | 英语 |
国家 | Denmark |
英文摘要 | The increase in glacial cycle length from approximately 41 to on average 100 thousand years around 1 million years ago, called the middle Pleistocene transition (MPT), lacks a conclusive explanation. We describe a dynamical mechanism which we call ramping with frequency locking (RFL), that explains the transition by an interaction between the internal period of a self-sustained oscillator and forcing that contains periodic components. This mechanism naturally explains the abrupt increase in cycle length from approximately 40 to 80 thousand years observed in proxy data, unlike some previously proposed mechanisms for the MPT. A rapid increase in durations can be produced by a rapid change in an external parameter, but this assumes rather than explains the abruptness. In contrast, models relying on frequency locking can produce a rapid change in durations assuming only a slow change in an external parameter. We propose a scheme for detecting RFL in complex, computationally expensive models, and motivate the search for climate variables that can gradually increase the internal period of the glacial cycles. |
英文关键词 | Glacial cycles Middle Pleistocene transition Frequency locking Internal period Abrupt transition |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000483626900032 |
WOS关键词 | GLACIAL CYCLES ; PHASE-LOCKING ; SIMPLE-MODEL ; ICE VOLUME ; CLIMATE ; OBLIQUITY ; VARIABILITY ; PRECESSION ; ATTRACTORS ; SHEET |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/186360 |
专题 | 气候变化 |
作者单位 | Univ Copenhagen, Ctr Ice & Climate, Niels Bohr Inst, Copenhagen, Denmark |
推荐引用方式 GB/T 7714 | Nyman, Karl H. M.,Ditlevsen, Peter D.. The middle Pleistocene transition by frequency locking and slow ramping of internal period[J]. CLIMATE DYNAMICS,2019,53:3023-3038. |
APA | Nyman, Karl H. M.,&Ditlevsen, Peter D..(2019).The middle Pleistocene transition by frequency locking and slow ramping of internal period.CLIMATE DYNAMICS,53,3023-3038. |
MLA | Nyman, Karl H. M.,et al."The middle Pleistocene transition by frequency locking and slow ramping of internal period".CLIMATE DYNAMICS 53(2019):3023-3038. |
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