| DOI: | 10.5194/cp-8-565-2012
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| Scopus记录号: | 2-s2.0-84863343614
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| 论文题名: | Vegetation-climate interactions in the warm mid-Cretaceous |
| 作者: | Zhou J.; Poulsen C.J.; Rosenbloom N.; Shields C.; Briegleb B.
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| 刊名: | Climate of the Past
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| ISSN: | 18149324
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| 出版年: | 2012
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| 卷: | 8, 期:2 | | 起始页码: | 565
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| 结束页码: | 576
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| 语种: | 英语
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| Scopus关键词: | albedo
; atmosphere-biosphere interaction
; bare soil
; carbon dioxide
; Cretaceous
; forest
; fossil
; general circulation model
; heat transfer
; meridional circulation
; overturn
; paleoclimate
; paleoecology
; polar region
; precipitation (climatology)
; vegetation dynamics
; warming
|
| 英文摘要: | Vegetation-climate interactions are thought to have amplified polar warmth during past warm periods. Here, we explore the vegetation-climate interactions in the mid-Cretaceous using a fully coupled ocean-atmosphere general circulation model with a dynamic vegetation component. We run simulations with 1x, 10x and 16x pre-industrial atmospheric CO 2. Results show that forests expand from mid-latitudes to high latitudes as CO 2 increases from 1x to 10x and 16x, mainly due to the CO 2-induced warming. This expansion of mid-to-high latitude forests are largely supported by the distribution of mid-Cretaceous fossil woods and coal deposits. Globally, the presence of vegetation increases mean annual temperature and precipitation by 0.9 °C and 0.11 mm day -1 relative to bare ground. High-latitude warming induced by the presence of vegetation (∼1.9 °C) is less than half of that reported in previous studies. The weaker warming here is mainly due to less pronounced albedo feedbacks, and to a less extent, reduced poleward heat transport via weakening of the meridional overturning circulation. Our results suggest that other mechanisms in addition to high atmospheric CO 2 and high-latitude vegetation are required to maintain the polar warmth. © Author(s) 2012. |
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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/49616
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| Appears in Collections: | 气候变化与战略
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| Recommended Citation: | |
Zhou J.,Poulsen C.J.,Rosenbloom N.,et al. Vegetation-climate interactions in the warm mid-Cretaceous[J]. Climate of the Past,2012-01-01,8(2)
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