Impacts of Diffuse Radiation on Light Use Efficiency across Terrestrial Ecosystems Based on Eddy Covariance Observation in China

	Impacts of Diffuse Radiation on Light Use Efficiency across Terrestrial Ecosystems Based on Eddy Covariance Observation in China
	Huang, Kun ; Wang, Shaoqiang ; Zhou, Lei ; Wang, Huimin ; Zhang, Junhui ; Yan, Junhua ; Zhao, Liang ; Wang, Yanfen ; Shi, Peili ; Wang, SQ (reprint author), Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China.
刊名	PLOS ONE
	2014-11-13
英文摘要	Ecosystem light use efficiency (LUE) is a key factor of production models for gross primary production (GPP) predictions. Previous studies revealed that ecosystem LUE could be significantly enhanced by an increase on diffuse radiation. Under large spatial heterogeneity and increasing annual diffuse radiation in China, eddy covariance flux data at 6 sites across different ecosystems from 2003 to 2007 were used to investigate the impacts of diffuse radiation indicated by the cloudiness index (CI) on ecosystem LUE in grassland and forest ecosystems. Our results showed that the ecosystem LUE at the six sites was significantly correlated with the cloudiness variation (0.24 <= R-2 <= 0.85), especially at the Changbaishan temperate forest ecosystem (R-2 = 0.85). Meanwhile, the CI values appeared more frequently between 0.8 and 1.0 in two subtropical forest ecosystems (Qianyanzhou and Dinghushan) and were much larger than those in temperate ecosystems. Besides, cloudiness thresholds which were favorable for enhancing ecosystem carbon sequestration existed at the three forest sites, respectively. Our research confirmed that the ecosystem LUE at the six sites in China was positively responsive to the diffuse radiation, and the cloudiness index could be used as an environmental regulator for LUE modeling in regional GPP prediction.
内容类型	期刊论文
源URL	[http://210.75.249.4/handle/363003/6594]
专题	西北高原生物研究所_中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Huang, Kun,Wang, Shaoqiang,Zhou, Lei,et al. Impacts of Diffuse Radiation on Light Use Efficiency across Terrestrial Ecosystems Based on Eddy Covariance Observation in China[J]. PLOS ONE,2014.
APA	Huang, Kun.,Wang, Shaoqiang.,Zhou, Lei.,Wang, Huimin.,Zhang, Junhui.,...&Wang, SQ .(2014).Impacts of Diffuse Radiation on Light Use Efficiency across Terrestrial Ecosystems Based on Eddy Covariance Observation in China.PLOS ONE.
MLA	Huang, Kun,et al."Impacts of Diffuse Radiation on Light Use Efficiency across Terrestrial Ecosystems Based on Eddy Covariance Observation in China".PLOS ONE (2014).