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Effects of Climatic Factors and Ecosystem Responses on the Inter-Annual Variability of Evapotranspiration in a Coniferous Plantation in Subtropical China
Xu, MingJie(徐明洁); Wen, XF; Wang, HM; Zhang, WJ; Dai, XQ; Song, J; Wang, YD; Fu, XL; Liu, YF; Sun, XM; Yu, GR
2014
Source PublicationPLOS ONE
Volume9Issue:1Pages:-
Corresponding AuthorWang, HM
Abstract

Because evapotranspiration (ET) is the second largest component of the water cycle and a critical process in terrestrial ecosystems, understanding the inter-annual variability of ET is important in the context of global climate change. Eight years of continuous eddy covariance measurements (2003-2010) in a subtropical coniferous plantation were used to investigate the impacts of climatic factors and ecosystem responses on the inter-annual variability of ET. The mean and standard deviation of annual ET for 2003-2010 were 786.9 and 103.4 mm (with a coefficient of variation of 13.1%), respectively. The inter-annual variability of ET was largely created in three periods: March, May-June, and October, which are the transition periods between seasons. A set of look-up table approaches were used to separate the sources of inter-annual variability of ET. The annual ETs were calculated by assuming that (a) both the climate and ecosystem responses among years are variable (Vcli-eco), (b) the climate is variable but the ecosystem responses are constant (V-cli), and (c) the climate is constant but ecosystem responses are variable (V-eco). The ETs that were calculated under the above assumptions suggested that the inter-annual variability of ET was dominated by ecosystem responses and that there was a negative interaction between the effects of climate and ecosystem responses. These results suggested that for long-term predictions of water and energy balance in global climate change projections, the ecosystem responses must be taken into account to better constrain the uncertainties associated with estimation.

Indexed BySCI
Funding OrganizationNational Key Basic Research Special Foundation Project 2010CB833501;Major Program of National Natural Science Foundation of China 31290221;National Natural Science Foundation of China 31070559 31210103920;National Key Basic Research Program of China 2012CB416903
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/28694
Collection研究生部
生态系统网络观测与模拟院重点实验室_生态系统综合研究中心
Corresponding AuthorWang, HM
Recommended Citation
GB/T 7714
Xu, MingJie,Wen, XF,Wang, HM,et al. Effects of Climatic Factors and Ecosystem Responses on the Inter-Annual Variability of Evapotranspiration in a Coniferous Plantation in Subtropical China[J]. PLOS ONE,2014,9(1):-.
APA Xu, MingJie.,Wen, XF.,Wang, HM.,Zhang, WJ.,Dai, XQ.,...&Yu, GR.(2014).Effects of Climatic Factors and Ecosystem Responses on the Inter-Annual Variability of Evapotranspiration in a Coniferous Plantation in Subtropical China.PLOS ONE,9(1),-.
MLA Xu, MingJie,et al."Effects of Climatic Factors and Ecosystem Responses on the Inter-Annual Variability of Evapotranspiration in a Coniferous Plantation in Subtropical China".PLOS ONE 9.1(2014):-.
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