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	Climate control of terrestrial carbon exchange across biomes and continents
	Li R.
	2010
关键词	NEE climate control terrestrial carbon sequestration temperature dryness eddy flux biomes photosynthesis respiration global carbon cycle eddy-covariance measurements long-term interannual variability spatial variability soil respiration deciduous forest water-vapor fluxes dioxide uncertainty
英文摘要	Understanding the relationships between climate and carbon exchange by terrestrial ecosystems is critical to predict future levels of atmospheric carbon dioxide because of the potential accelerating effects of positive climate-carbon cycle feedbacks. However, directly observed relationships between climate and terrestrial CO(2) exchange with the atmosphere across biomes and continents are lacking. Here we present data describing the relationships between net ecosystem exchange of carbon (NEE) and climate factors as measured using the eddy covariance method at 125 unique sites in various ecosystems over six continents with a total of 559 site-years. We find that NEE observed at eddy covariance sites is (1) a strong function of mean annual temperature at mid-and high-latitudes, (2) a strong function of dryness at mid-and low-latitudes, and (3) a function of both temperature and dryness around the mid-latitudinal belt (45 degrees N). The sensitivity of NEE to mean annual temperature breaks down at similar to 16 degrees C (a threshold value of mean annual temperature), above which no further increase of CO(2) uptake with temperature was observed and dryness influence overrules temperature influence.
出处	Environmental Research Letters
卷	5
期	3
收录类别	SCI
语种	英语
ISSN号	1748-9326
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/22540]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Li R.. Climate control of terrestrial carbon exchange across biomes and continents. 2010.

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