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DOI:	10.1371/journal.pone.0110988
论文题名:	Impacts of Diffuse Radiation on Light Use Efficiency across Terrestrial Ecosystems Based on Eddy Covariance Observation in China
作者:	Kun Huang; Shaoqiang Wang; Lei Zhou; Huimin Wang; Junhui Zhang; Junhua Yan; Liang Zhao; Yanfen Wang; Peili Shi
刊名:	PLOS ONE
ISSN:	1932-6203
出版年:	2014
发表日期:	2014-11-13
卷:	9, 期:11
语种:	英语
英文关键词:	Ecosystems ; Photosynthesis ; Forest ecology ; Forests ; Solar radiation ; Grasslands ; Seasons ; Temperate forests
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≤R2≤0.85), especially at the Changbaishan temperate forest ecosystem (R2 = 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.
URL:	http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0110988&type=printable
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资源类型:	期刊论文
标识符:	http://119.78.100.158/handle/2HF3EXSE/19010
Appears in Collections:	过去全球变化的重建影响、适应和脆弱性科学计划与规划气候变化与战略全球变化的国际研究计划气候减缓与适应气候变化事实与影响

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作者单位:

Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;University of Chinese Academy of Sciences, Beijing 100049, China;Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China;Northwest Plateau Institute of Biology, Chinese Academy of Sciences, Xining 810001, China;University of Chinese Academy of Sciences, Beijing 100049, China;Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China

Recommended Citation:

Kun Huang,Shaoqiang Wang,Lei Zhou,et al. Impacts of Diffuse Radiation on Light Use Efficiency across Terrestrial Ecosystems Based on Eddy Covariance Observation in China[J]. PLOS ONE,2014-01-01,9(11)

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