DOI: 10.1002/grl.50563
论文题名: Impact of CO2 fertilization on maximum foliage cover across the globe's warm, arid environments
作者: Donohue R.J. ; Roderick M.L. ; McVicar T.R. ; Farquhar G.D.
刊名: Geophysical Research Letters
ISSN: 0094-8883
EISSN: 1944-8614
出版年: 2013
卷: 40, 期: 12 起始页码: 3031
结束页码: 3035
语种: 英语
英文关键词: AVHRR
; CO2 fertilisation
; cover
Scopus关键词: Arid environments
; AVHRR
; cover
; Fertilisation
; Land-surface process
; Quantitative links
; Satellite observations
; Vegetation growth
; Vegetation
; Carbon dioxide
; anthropogenic effect
; arid region
; AVHRR
; carbon cycle
; carbon dioxide
; carbon dioxide enrichment
; foliage
; gas exchange
; growth rate
; photosynthesis
; satellite imagery
; vegetation cover
英文摘要: Satellite observations reveal a greening of the globe over recent decades. The role in this greening of the "CO2 fertilization" effect-the enhancement of photosynthesis due to rising CO2 levels-is yet to be established. The direct CO2 effect on vegetation should be most clearly expressed in warm, arid environments where water is the dominant limit to vegetation growth. Using gas exchange theory, we predict that the 14% increase in atmospheric CO2 (1982-2010) led to a 5 to 10% increase in green foliage cover in warm, arid environments. Satellite observations, analyzed to remove the effect of variations in precipitation, show that cover across these environments has increased by 11%. Our results confirm that the anticipated CO2 fertilization effect is occurring alongside ongoing anthropogenic perturbations to the carbon cycle and that the fertilization effect is now a significant land surface process. Key Points We examine, for a set rainfall, the maximum foliage cover observable by satellite In warm, dry places, such maximum cover has risen by 11% globally (1982-2010) We show a physical and quantitative link between this rise and CO2 fertilization ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880561223&doi=10.1002%2fgrl.50563&partnerID=40&md5=e055e5c220b9cf6ff342200c69e2fdc8
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6147
Appears in Collections: 气候减缓与适应
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作者单位: CSIRO Land and Water, GPO Box 1666, Canberra, ACT 2601, Australia
Recommended Citation:
Donohue R.J.,Roderick M.L.,McVicar T.R.,et al. Impact of CO2 fertilization on maximum foliage cover across the globe's warm, arid environments[J]. Geophysical Research Letters,2013-01-01,40(12).