| DOI: | 10.1007/s00382-013-1746-4
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| Scopus记录号: | 2-s2.0-84891624782
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| 论文题名: | The simulated atmospheric response to expansion of the Arctic boreal forest biome |
| 作者: | Snyder P.K.; Liess S.
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| 刊名: | Climate Dynamics
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| ISSN: | 9307575
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| 出版年: | 2014
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| 卷: | 42, 期:2017-01-02 | | 起始页码: | 487
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| 结束页码: | 503
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| 语种: | 英语
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| 英文关键词: | Arctic
; Boreal forest
; Climate change
; Global climate model
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| 英文摘要: | Over the last century, the Arctic has warmed at twice the rate of the planet as a whole. Observational evidence indicates that this rapid warming is affecting the tundra and boreal forest biomes by changing their structure and geographic distribution. A global climate model (GCM) was used to explore the atmospheric response to boreal forest expansion by applying a one-grid cell shift of the forest into tundra. This subtle shift is meant to represent the expansion that would occur this century rather than more extreme scenarios predicted by dynamic vegetation models. Results show that this shift causes an average annual warming of 0.3 °C over the region because of a reduction in the surface albedo and an increase in net radiation. A warming of ~1.0 °C occurs in spring when the forest masks the higher albedo snow-covered surface and results in snowmelt and a reduction in cloud cover. Results fail to show a larger-scale dynamical response although some warming of the lower and mid troposphere occurs in July. No changes were found in the position or strength of the Arctic frontal zone as some studies have indicated will occur with a shift in the boreal forest-tundra boundary. These findings suggest that coupled model simulations that predict larger changes in vegetation distribution are likely overemphasizing the amount of Arctic warming that will occur this century. These findings also indicate that a realistic dynamical response to subtle land cover change might not be correctly simulated by GCMs run at coarse spatial resolutions. © 2013 Springer-Verlag Berlin Heidelberg. |
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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/54449
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| Appears in Collections: | 过去全球变化的重建
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作者单位: | Department of Soil, Water, and Climate, University of Minnesota, 439 Borlaug Hall, 1991 Upper Buford Circle, Saint Paul, MN, 55108, United States
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| Recommended Citation: | |
Snyder P.K.,Liess S.. The simulated atmospheric response to expansion of the Arctic boreal forest biome[J]. Climate Dynamics,2014-01-01,42(2017-01-02)
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