| DOI: | 10.5194/cp-11-1335-2015
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| Scopus记录号: | 2-s2.0-84929470211
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| 论文题名: | Obliquity forcing of low-latitude climate |
| 作者: | Bosmans J.H.C.; Hilgen F.J.; Tuenter E.; Lourens L.J.
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| 刊名: | Climate of the Past
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| ISSN: | 18149324
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| 出版年: | 2015
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| 卷: | 11, 期:10 | | 起始页码: | 1335
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| 结束页码: | 1346
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| 语种: | 英语
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| Scopus关键词: | atmosphere-ocean coupling
; climate modeling
; Earth rotation
; ice sheet
; insolation
; latitude
; obliquity
; paleoclimate
; solar radiation
; tilt
; tropical environment
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| 英文摘要: | The influence of obliquity, the tilt of the Earth's rotational axis, on incoming solar radiation at low latitudes is small, yet many tropical and subtropical palaeoclimate records reveal a clear obliquity signal. Several mechanisms have been proposed to explain this signal, such as the remote influence of high-latitude glacials, the remote effect of insolation changes at mid- to high latitudes independent of glacial cyclicity, shifts in the latitudinal extent of the tropics, and changes in latitudinal insolation gradients. Using a sophisticated coupled ocean-atmosphere global climate model, EC-Earth, without dynamical ice sheets, we performed two idealized experiments of obliquity extremes. Our results show that obliquity-induced changes in tropical climate can occur without high-latitude ice sheet fluctuations. Furthermore, the tropical circulation changes are consistent with obliquity-induced changes in the cross-equatorial insolation gradient, suggesting that this gradient may be used to explain obliquity signals in low-latitude palaeoclimate records instead of the classical 65° N summer insolation curve. © Author(s) 2015. |
| 资助项目: | UU, Utrecht University
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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/49108
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| Appears in Collections: | 气候变化与战略
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| Recommended Citation: | |
Bosmans J.H.C.,Hilgen F.J.,Tuenter E.,et al. Obliquity forcing of low-latitude climate[J]. Climate of the Past,2015-01-01,11(10)
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