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	High carbon dioxide uptake by subtropical forest ecosystems in the East Asian monsoon region
	Yu G. R. ; Chen Z. ; Piao S. L. ; Peng C. H. ; Ciais P. ; Wang Q. F. ; Li X. R. ; Zhu X. J.
	2014
关键词	soil respiration nitrogen deposition tropical forests tibetan plateau atmospheric co2 pine forests climate exchange fluxes sequestration
英文摘要	Temperate- and high-latitude forests have been shown to contribute a carbon sink in the Northern Hemisphere, but fewer studies have addressed the carbon balance of the subtropical forests. In the present study, we integrated eddy covariance observations established in the 1990s and 2000s to show that East Asian monsoon subtropical forests between 20 degrees N and 40 degrees N represent an average net ecosystem productivity (NEP) of 362 +/- 39 g C m(-2) yr(-1) (mean +/- 1 SE). This average forest NEP value is higher than that of Asian tropical and temperate forests and is also higher than that of forests at the same latitudes in Europe-Africa and North America. East Asian monsoon subtropical forests have comparable NEP to that of subtropical forests of the southeastern United States and intensively managed Western European forests. The total NEP of East Asian monsoon subtropical forests was estimated to be 0.72 +/- 0.08 Pg C yr(-1), which accounts for 8% of the global forest NEP. This result indicates that the role of subtropical forests in the current global carbon cycle cannot be ignored and that the regional distributions of the Northern Hemisphere's terrestrial carbon sinks are needed to be reevaluated. The young stand ages and high nitrogen deposition, coupled with sufficient and synchronous water and heat availability, may be the primary reasons for the high NEP of this region, and further studies are needed to quantify the contribution of each underlying factor.
出处	Proceedings of the National Academy of Sciences of the United States of America
卷	111
期	13
页	4910-4915
收录类别	SCI
语种	英语
ISSN号	0027-8424
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/29441]
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	Yu G. R.,Chen Z.,Piao S. L.,et al. High carbon dioxide uptake by subtropical forest ecosystems in the East Asian monsoon region. 2014.

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