| DOI: | 10.5194/cp-14-73-2018
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| Scopus记录号: | 2-s2.0-85040790050
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| 论文题名: | Hybrid insolation forcing of Pliocene monsoon dynamics in West Africa |
| 作者: | Kuechler R.R.; Dupont L.M.; Schefuß E.
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| 刊名: | Climate of the Past
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| ISSN: | 18149324
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| 出版年: | 2018
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| 卷: | 14, 期:1 | | 起始页码: | 73
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| 结束页码: | 84
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| 语种: | 英语
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| Scopus关键词: | climate variation
; eccentricity
; historical record
; hydrological change
; insolation
; Last Glacial
; latitudinal gradient
; monsoon
; Northern Hemisphere
; paleohydrology
; Pliocene
; radiative forcing
; tropical region
; vegetation dynamics
; West Africa
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| 英文摘要: | The Pliocene is regarded as a potential analogue for future climate with conditions generally warmer-than-today and higher-than-preindustrial atmospheric CO2 levels. Here we present the first orbitally resolved records of continental hydrology and vegetation changes from West Africa for two Pliocene time intervals (5.0-4.6Ma, 3.6-3.0Ma), which we compare with records from the last glacial cycle (Kuechler et al., 2013). Our results indicate that changes in local insolation alone are insufficient to explain the full degree of hydrologic variations. Generally two modes of interacting insolation forcings are observed: During eccentricity maxima, when precession was strong, the West African monsoon was driven by summer insolation; during eccentricity minima, when precession-driven variations in local insolation were minimal, obliquity-driven changes in the summer latitudinal insolation gradient became dominant. This hybrid monsoonal forcing concept explains orbitally controlled tropical climate changes, incorporating the forcing mechanism of latitudinal gradients for the Pliocene, which probably increased in importance during subsequent Northern Hemisphere glaciations. © Author(s) 2018. |
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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/109599
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| Appears in Collections: | 影响、适应和脆弱性
气候变化事实与影响
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作者单位: | MARUM - Center for Marine Environmental Sciences, University of Bremen, Leobener Str. 8, Bremen, 28359, Germany
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| Recommended Citation: | |
Kuechler R.R.,Dupont L.M.,Schefuß E.. Hybrid insolation forcing of Pliocene monsoon dynamics in West Africa[J]. Climate of the Past,2018-01-01,14(1)
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