DOI: 10.1002/2013GL058994
论文题名: The impact of climate-vegetation interactions on the onset of the Antarctic ice sheet
作者: Liakka J. ; Colleoni F. ; Ahrens B. ; Hickler T.
刊名: Geophysical Research Letters
ISSN: 0094-10356
EISSN: 1944-10087
出版年: 2014
卷: 41, 期: 4 起始页码: 1269
结束页码: 1276
语种: 英语
英文关键词: Antarctica
; Cenozoic
; climate/vegetation interactions
; coupled climate/vegetation models
; Eocene/Oligocene boundary
; ice sheet inception
Scopus关键词: Atmospheric temperature
; Carbon dioxide
; Clouds
; Feedback
; Glacial geology
; Glaciers
; Snow
; Vegetation
; Antarctic ice sheets
; Antarctica
; Atmospheric meridional heat transport
; Cenozoic
; Eocene/Oligocene boundary
; Ice sheet
; Snow-albedo feedbacks
; Vegetation feedbacks
; Climate models
; albedo
; carbon dioxide
; Cenozoic
; climate change
; ecological modeling
; Eocene
; glaciation
; heat balance
; ice sheet
; Oligocene
; snow cover
; threshold
; vegetation structure
; Antarctica
英文摘要: A global coupled atmosphere/vegetation model and a dynamic ice sheet model were employed to study the impact of climate-vegetation interactions on the onset of the Antarctic ice sheet during the Eocene-Oligocene transition. We found that the CO2 threshold for Antarctic glaciation is highly sensitive to the prevailing vegetation. In our experiments, the CO2 threshold is less than 280 ppm if the Antarctic vegetation is dominated by forests and between 560 and 1120 ppm for tundra and bare ground conditions. The large impact of vegetation on inception is attributed to the ability of canopies to shade the snow-covered ground, which leads to a weaker snow albedo feedback and higher summer temperatures. However, the overall effect of canopy shading on the Antarctic climate also depends on features like local cloudiness and atmospheric meridional heat transport. Our results suggest that vegetation feedbacks on climate are crucial for the timing of the Antarctic glaciation. Key Points The CO2 threshold for Antarctic glaciation is highly sensitive to vegetation Vegetation increases the surface temperature by shading the snow-covered ground The vegetation effect on the local climate is sensitive to the local cloudiness ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84894256417&doi=10.1002%2f2013GL058994&partnerID=40&md5=49a2e24a62092cdacb0f41520da6019d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7620
Appears in Collections: 气候减缓与适应
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作者单位: Biodiversity and Climate Research Centre (LOEWE BiK-F), Frankfurt, Germany
Recommended Citation:
Liakka J.,Colleoni F.,Ahrens B.,et al. The impact of climate-vegetation interactions on the onset of the Antarctic ice sheet[J]. Geophysical Research Letters,2014-01-01,41(4).