| DOI: | 10.1007/s00382-015-2716-9
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| Scopus记录号: | 2-s2.0-84935041797
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| 论文题名: | Influence of topography on tropical African vegetation coverage |
| 作者: | Jung G.; Prange M.; Schulz M.
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| 刊名: | Climate Dynamics
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| ISSN: | 9307575
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| 出版年: | 2016
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| 卷: | 46, 期:2017-07-08 | | 起始页码: | 2535
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| 结束页码: | 2549
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| 语种: | 英语
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| 英文关键词: | African vegetation
; Global climate modelling
; Late miocene
; Paleoclimate
; Topography
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| 英文摘要: | Hominid evolution in the late Miocene has long been hypothesized to be linked to the retreat of the tropical rainforest in Africa. One cause for the climatic and vegetation change often considered was uplift of Africa, but also uplift of the Himalaya and the Tibetan Plateau was suggested to have impacted rainfall distribution over Africa. Recent proxy data suggest that in East Africa open grassland habitats were available to the common ancestors of hominins and apes long before their divergence and do not find evidence for a closed rainforest in the late Miocene. We used the coupled global general circulation model CCSM3 including an interactively coupled dynamic vegetation module to investigate the impact of topography on African hydro-climate and vegetation. We performed sensitivity experiments altering elevations of the Himalaya and the Tibetan Plateau as well as of East and Southern Africa. The simulations confirm the dominant impact of African topography for climate and vegetation development of the African tropics. Only a weak influence of prescribed Asian uplift on African climate could be detected. The model simulations show that rainforest coverage of Central Africa is strongly determined by the presence of elevated African topography. In East Africa, despite wetter conditions with lowered African topography, the conditions were not favorable enough to maintain a closed rainforest. A discussion of the results with respect to other model studies indicates a minor importance of vegetation-atmosphere or ocean-atmosphere feedbacks and a large dependence of the simulated vegetation response on the land surface/vegetation model. © Springer-Verlag Berlin Heidelberg 2015. |
| 资助项目: | DFG, Deutsche Forschungsgemeinschaft
; NCAR, National Center for Atmospheric Research
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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/53624
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| Appears in Collections: | 过去全球变化的重建
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作者单位: | MARUM, Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany; Faculty of Geosciences, University of Bremen, Bremen, Germany
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| Recommended Citation: | |
Jung G.,Prange M.,Schulz M.. Influence of topography on tropical African vegetation coverage[J]. Climate Dynamics,2016-01-01,46(2017-07-08)
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