1982-2010 Trends of Light Use Efficiency and Inherent Water Use   Efficiency in African vegetation: Sensitivity to Climate and Atmospheric   CO2 Concentrations

doi:10.3390/rs6098923

CORC > 北京大学 > 城市与环境学院

	1982-2010 Trends of Light Use Efficiency and Inherent Water Use Efficiency in African vegetation: Sensitivity to Climate and Atmospheric CO2 Concentrations
	Traore, Abdoul Khadre ; Ciais, Philippe ; Vuichard, Nicolas ; MacBean, Natasha ; Dardel, Cecile ; Poulter, Benjamin ; Piao, Shilong ; Fisher, Joshua B. ; Viovy, Nicolas ; Jung, Martin ; Myneni, Ranga
刊名	remote sens basel
	2014
关键词	inherent water use efficiency light use efficiency Africa trend analysis atmospheric CO2 effect and climate effects on vegetation PHOTOSYNTHETICALLY ACTIVE RADIATION NET ECOSYSTEM EXCHANGE TREE-RING DELTA-C-13 CARBON-DIOXIDE DIFFUSE-RADIATION FAGUS-SYLVATICA ARID ECOSYSTEMS SOLAR-RADIATION PAST CENTURY RAIN-FOREST
DOI	10.3390/rs6098923
英文摘要	Light and water use by vegetation at the ecosystem level, are key components for understanding the carbon and water cycles particularly in regions with high climate variability and dry climates such as Africa. The objective of this study is to examine recent trends over the last 30 years in Light Use Efficiency (LUE) and inherent Water Use Efficiency (iWUE) for the major biomes of Africa, including their sensitivities to climate and CO2. LUE and iWUE trends are analyzed using a combination of NOAA-AVHRR NDVI3g and fAPAR3g, and a data-driven model of monthly evapotranspiration and Gross Primary Productivity (based on flux tower measurements and remote sensing fAPAR, yet with no flux tower data in Africa) and the ORCHIDEE (ORganizing Carbon and Hydrology In Dynamic EcosystEms) process-based land surface model driven by variable CO2 and two different gridded climate fields. The iWUE* data product increases by 10%-20% per decade during the 1982-2010 period over the northern savannas (due to positive trend of vegetation productivity) and the central African forest (due to positive trend of vapor pressure deficit). In contrast to the iWUE, the LUE trends are not statistically significant. The process-based model simulations only show a positive linear trend in iWUE and LUE over the central African forest. Additionally, factorial model simulations were conducted to attribute trends in iWUE and LUE to climate change and rising CO2 concentrations. We found that the increase of atmospheric CO2 by 52.8 ppm during the period of study explains 30%-50% of the increase in iWUE* and > 90% of the LUE trend over the central African forest. The modeled iWUE* trend exhibits a high sensitivity to the climate forcing and environmental conditions, whereas the LUE trend has a smaller sensitivity to the selected climate forcing.; Remote Sensing; SCI(E); EI; 0; ARTICLE; traore@lsce.ipsl.fr; philippe.ciais@lsce.ipsl.fr; nicolas.vuichard@lsce.ipsl.fr; Natasha.MacBean@lsce.ipsl.fr; cecile.dardel@gmail.com; benjamin.poulter@montana.edu; slpiao@pku.edu.cn; Joshua.B.Fisher@jpl.nasa.gov; nicolas.viovy@lsce.ipsl.fr; mjung@bgc-jena.mpg.de; ranga.myneni@gmail.com; 9; 8923-8944; 6
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/388274]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Traore, Abdoul Khadre,Ciais, Philippe,Vuichard, Nicolas,et al. 1982-2010 Trends of Light Use Efficiency and Inherent Water Use Efficiency in African vegetation: Sensitivity to Climate and Atmospheric CO2 Concentrations[J]. remote sens basel,2014.
APA	Traore, Abdoul Khadre.,Ciais, Philippe.,Vuichard, Nicolas.,MacBean, Natasha.,Dardel, Cecile.,...&Myneni, Ranga.(2014).1982-2010 Trends of Light Use Efficiency and Inherent Water Use Efficiency in African vegetation: Sensitivity to Climate and Atmospheric CO2 Concentrations.remote sens basel.
MLA	Traore, Abdoul Khadre,et al."1982-2010 Trends of Light Use Efficiency and Inherent Water Use Efficiency in African vegetation: Sensitivity to Climate and Atmospheric CO2 Concentrations".remote sens basel (2014).