A growing season climatic index to simulate gross primary productivity and carbon budget in a Tibetan alpine meadow
文献类型：期刊论文
| 作者 | Chai, X; Shi, PL; Zong, N; He, YT; Zhang, XZ; Xu, MJ; Zhang, J |
| 刊名 | ECOLOGICAL INDICATORS
 |
| 出版日期 | 2017 |
| 卷号 | 81页码:285-294 |
| 关键词 | Gross primary production Growing season index Eddy covariance Alpine meadow Tibetan Plateau |
| ISSN号 | 1470-160X |
| 英文摘要 | Accurate estimation of gross primary production (GPP) of ecosystem is needed to evaluate terrestrial carbon cycle at various spatial and temporal scales. Eddy covariance (EC) technique provides continuous measurements of net ecosystem CO2 exchange (NEE) and can be used to separate GPP from NEE in real time series. However, seasonal and inter-annual variation and consequently ecosystem carbon budget is still very difficult to simulate from climatic and environment. To address this limitation, we develop a growing season indicator (GSI) based on low temperature and soil water stress to model and predict intra and inter-annual dynamic of gross primary productivity (GPP). Validation of this new index was conducted using continuous six-year consective EC measurement from 2004 to 2009 at a Tibetan alpine meadow. Simulated GPP agreed well with the observed GPP in terms of seasonal and inter-annual variation. The six-year correlation coefficients on seasonal scale between GSI and scalar GPP derived from EC reached more than 0.85 no matter in dry years or wet years. In addition, the temporal GPP estimation derived from GSI model was quite similar to those from observed values by EC measurement. Moreover, accumulated GSI values can predict annual variability of net ecosystem production (NEP). Higher yearly accumulated GSI corresponded to more annual NEP. When cumulative GSI arrived up to 92, the target ecosystem was a carbon sink. This is probably a threshold which Tibetan alpine meadow changes from carbon source to carbon sink. It is indicated that the GSI model is a simple, alternative approach to estimating GPP and has the potential to simulate spatial GPP in a larger scale. However, the performance of GSI model in other vegetation types or regions still needs a further verification. |
| 学科主题 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000417229100029 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/43995]  |
| 专题 | 生态系统网络观测与模拟院重点实验室_生态网络实验室 |
| 推荐引用方式 GB/T 7714 | Chai, X,Shi, PL,Zong, N,et al. A growing season climatic index to simulate gross primary productivity and carbon budget in a Tibetan alpine meadow[J]. ECOLOGICAL INDICATORS,2017,81:285-294. |
| APA | Chai, X.,Shi, PL.,Zong, N.,He, YT.,Zhang, XZ.,...&Zhang, J.(2017).A growing season climatic index to simulate gross primary productivity and carbon budget in a Tibetan alpine meadow.ECOLOGICAL INDICATORS,81,285-294. |
| MLA | Chai, X,et al."A growing season climatic index to simulate gross primary productivity and carbon budget in a Tibetan alpine meadow".ECOLOGICAL INDICATORS 81(2017):285-294. |
入库方式： OAI收割
来源：地理科学与资源研究所
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