| DOI: | 10.5194/cp-11-1563-2015
|
| Scopus记录号: | 2-s2.0-84948453108
|
| 论文题名: | Transitivity of the climate-vegetation system in a warm climate |
| 作者: | Port U.; Claussen M.
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| 刊名: | Climate of the Past
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| ISSN: | 18149324
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| 出版年: | 2015
|
| 卷: | 11, 期:11 | | 起始页码: | 1563
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| 结束页码: | 1574
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| 语种: | 英语
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| Scopus关键词: | atmosphere-biosphere interaction
; circulation
; climate effect
; climate variation
; desert
; Eocene
; feedback mechanism
; Quaternary
; vegetation structure
; Asia
; Central America
; North America
; Sahel [Sub-Saharan Africa]
; South America
|
| 英文摘要: | To date, the transitivity of the global system has been analysed for late Quaternary (glacial, interglacial, and present-day) climate. Here, we extend this analysis to a warm, almost ice-free climate with a different configuration of continents. We use the Earth system model of the Max Planck Institute for Meteorology to analyse the stability of the climate system under early Eocene and pre-industrial conditions. We initialize the simulations by prescribing either dense forests or bare deserts on all continents. Starting with desert continents, an extended desert remains in central Asia in the early Eocene climate. Starting with dense forest coverage, the Asian desert is much smaller, while coastal deserts develop in the Americas which appear to be larger than in the simulations with initially bare continents. These differences can be attributed to differences in the large-scale tropical circulation. With initially forested continents, a stronger dipole in the 200 hPa velocity potential develops than in the simulation with initially bare continents. This difference prevails when vegetation is allowed to adjust to and interact with climate. Further simulations with initial surface conditions that differ in the region of the Asian desert only indicate that local feedback processes are less important in the development of multiple states. In the interglacial, pre-industrial climate, multiple states develop only in the Sahel region. There, local climate-vegetation interaction seems to dominate. © Author(s) 2015. |
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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/49095
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| Appears in Collections: | 气候变化与战略
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| Recommended Citation: | |
Port U.,Claussen M.. Transitivity of the climate-vegetation system in a warm climate[J]. Climate of the Past,2015-01-01,11(11)
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