| DOI: | 10.1002/2013GL058737
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| 论文题名: | Montane forest root growth and soil organic layer depth as potential factors stabilizing Cenozoic global change |
| 作者: | Doughty C.E.; Taylor L.L.; Girardin C.A.J.; Malhi Y.; Beerling D.J.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-10384
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| EISSN: | 1944-10115
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| 出版年: | 2014
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| 卷: | 41, 期:3 | | 起始页码: | 983
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| 结束页码: | 990
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| 语种: | 英语
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| 英文关键词: | Elevation transect
; Montane forests
; NPP
; Weathering
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| Scopus关键词: | Carbon dioxide
; Feedback
; Forestry
; Soils
; Tectonics
; Weathering
; Altitudinal transect
; Biological weathering
; Elevation transect
; Global temperatures
; Montane ecosystems
; Montane forests
; NPP
; Volcanic degassing
; Climate models
; carbon dioxide
; Cenozoic
; climate variation
; global change
; growth
; montane forest
; root
; soil organic matter
; temperature effect
; uplift
; weathering
; Carbon Dioxide
; Drawings
; Forests
; Soil
; Weathering
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| 英文摘要: | Tree roots and their symbiotic fungal partners are believed to play a major role in regulating long-term global climate, but feedbacks between global temperature and biotic weathering have not yet been explored in detail. In situ field data from a 3000 m altitudinal transect in Peru show fine root growth decreases and organic layer depth increases with the cooler temperatures that prevail at increased altitude. We hypothesize that this observation suggests a negative feedback: as global temperatures rise, the soil organic layer will shrink, and more roots will grow in the mineral layer, thereby accelerating weathering and reducing atmospheric CO2. We examine this mechanism with a process-based biological weathering model and demonstrate that this negative feedback could have contributed to moderating long-term global Cenozoic climate during major Cenozoic CO2 changes linked to volcanic degassing and tectonic uplift events. Key Points Weathering rates decrease at elevation partially due to a thick soil organic layer If global climate is perturbed, montane ecosystems may buffer perturbations We show two tectonic events when this may have occurred ©2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896784193&doi=10.1002%2f2013GL058737&partnerID=40&md5=a9b23c0652828cc9c6bd6c1befeda19f
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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/7648
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Environmental Change Institute, School of Geography and the Environment, University of Oxford, Oxford, United Kingdom
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| Recommended Citation: | |
Doughty C.E.,Taylor L.L.,Girardin C.A.J.,et al. Montane forest root growth and soil organic layer depth as potential factors stabilizing Cenozoic global change[J]. Geophysical Research Letters,2014-01-01,41(3).
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