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	Greening of the Earth and its drivers
	Zhu Z. C.; Piao, S. L.; Myneni, R. B.; Huang, M. T.; Zeng, Z. Z.; Canadell, J. G.; Ciais, P.; Sitch, S.; Friedlingstein, P.; Arneth, A.
	2016
关键词	terrestrial carbon-cycle photosynthetic capacity nitrogen deposition forests co2 deforestation productivity temperature models trends
英文摘要	Global environmental change is rapidly altering the dynamics of terrestrial vegetation, with consequences for the functioning of the Earth system and provision of ecosystem services(1,2). Yet how global vegetation is responding to the changing environment is not well established. Here we use three long-term satellite leaf area index (LAI) records and ten global ecosystem models to investigate four key drivers of LAI trends during 1982-2009. We show a persistent and widespread increase of growing season integrated LAI (greening) over 25% to 50% of the global vegetated area, whereas less than 4% of the globe shows decreasing LAI (browning). Factorial simulations with multiple global ecosystem models suggest that CO2 fertilization effects explain 70% of the observed greening trend, followed by nitrogen deposition (9%), climate change (8%) and land cover change (LCC) (4%). CO2 fertilization effects explain most of the greening trends in the tropics, whereas climate change resulted in greening of the high latitudes and the Tibetan Plateau. LCC contributed most to the regional greening observed in southeast China and the eastern United States. The regional effects of unexplained factors suggest that the next generation of ecosystem models will need to explore the impacts of forest demography, differences in regional management intensities for cropland and pastures, and other emerging productivity constraints such as phosphorus availability.
出处	Nature Climate Change
卷	6
期	8
页	791-+
收录类别	SCI
语种	英语
ISSN号	1758-678X
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/43968]
专题	地理科学与资源研究所_生态系统研究网络观测与模拟重点实验室_CERN水分分中心
推荐引用方式 GB/T 7714	Zhu Z. C.,Piao, S. L.,Myneni, R. B.,et al. Greening of the Earth and its drivers. 2016.

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