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| Large-scale estimation and uncertainty analysis of gross primary production in Tibetan alpine grasslands | |
He, Honglin; Liu, Min1; Xiao, Xiangming2; Ren, Xiaoli3; Zhang, Li; Sun, Xiaomin; Yang, Yuanhe4 ; Li, Yingnian5; Zhao, Liang5; Shi, Peili; Du, Mingyuan6; Ma, Yaoming7; Ma, Mingguo8; Zhang, Yu8; Yu, Guirui
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| 2014 | |
| 发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
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| ISSN | 2169-8953 |
| 卷号 | 119期号:3页码:466-486 |
| 摘要 | Gross primary production (GPP) is an important parameter for carbon cycle and climate change research. Previous estimations of GPP on the Tibetan Plateau were usually reported without quantitative uncertainty analyses. This study sought to quantify the uncertainty and its partitioning in GPP estimation across Tibetan alpine grasslands during 2003-2008 with the modified Vegetation Photosynthesis Model (VPM). Monte Carlo analysis was used to provide a quantitative assessment of the uncertainty in model simulations, and Sobol' variance decomposition method was applied to determine the relative contribution of each source of uncertainty to the total uncertainty. The results showed that the modified VPM successfully reproduced the seasonal dynamics and magnitude of GPP of 10 flux tower sites on the plateau (R-2=0.77-0.95, p < 0.001). The 6 year mean GPP in Tibetan alpine grasslands was estimated at 223.3 Tg C yr(-1) (312.3g C m(-2)yr(-1)). The mean annual GPP increased from western to eastern plateau, with the increase of annual temperature and precipitation and the decrease of elevation, while the decrease of GPP from southern to northern plateau was primarily driven by air temperature. Furthermore, the mean relative uncertainty of the annual GPP was 18.30%, with larger uncertainty occurring in regions with lower GPP. Photosynthetic active radiation, enhanced vegetation index, and the maximum light use efficiency (LUE) are the primary sources of uncertainty in GPP estimation, contributing 36.84%, 26.86%, and 21.99%, respectively. This emphasizes the importance of uncertainty in driving variables as well as that of maximum LUE in LUE model simulation. |
| 关键词 | Tibetan alpine grasslands Vegetation Photosynthesis Model (VPM) Eddy Covariance Uncertainty analysis |
| 学科领域 | Environmental Sciences ; Geosciences, Multidisciplinary |
| DOI | 10.1002/2013JG002449 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS关键词 | LIGHT-USE-EFFICIENCY ; NET ECOSYSTEM EXCHANGE ; TERRESTRIAL ECOSYSTEMS ; SENSITIVITY-ANALYSIS ; DATA ASSIMILATION ; FLUX MEASUREMENTS ; COMBINING MODIS ; CO2 EXCHANGE ; TIME-SERIES ; MODEL |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology |
| WOS记录号 | WOS:000334534500020 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 文献子类 | Article |
| 出版地 | WASHINGTON |
| EISSN | 2169-8961 |
| 资助机构 | National Natural Science Foundation of China [41071251] ; Science and technology projects of China on Certified carbon budget affected by climate change and related issues [XDA05050600] ; National Basic Research Program of China [2010CB833504] ; NASA [NNX09AE93G] |
| 作者邮箱 | yugr@igsnrr.ac.cn |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ibcas.ac.cn/handle/2S10CLM1/27227 |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing, Peoples R China 2.E China Normal Univ, Shanghai Key Lab Urban Ecol Proc & Ecorestorat, Shanghai 200062, Peoples R China 3.Univ Oklahoma, Dept Bot & Microbiol, Norman, OK 73019 USA 4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China 5.Chinese Acad Sci, State Key Lab Vegetat & Environm Change, Inst Bot, Beijing, Peoples R China 6.Chinese Acad Sci, Northwest Plateau Inst Biol, Xining, Qinghai, Peoples R China 7.Natl Inst Agroenvironm Sci, Tsukuba, Ibaraki 305, Japan 8.Chinese Acad Sci, Key Lab Tibetan Environm Changes & Land Surface P, Inst Tibetan Plateau Res, Beijing, Peoples R China 9.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou, Gansu, Peoples R China |
| 推荐引用方式 GB/T 7714 | He, Honglin,Liu, Min,Xiao, Xiangming,et al. Large-scale estimation and uncertainty analysis of gross primary production in Tibetan alpine grasslands[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2014,119(3):466-486. |
| APA | He, Honglin.,Liu, Min.,Xiao, Xiangming.,Ren, Xiaoli.,Zhang, Li.,...&Yu, Guirui.(2014).Large-scale estimation and uncertainty analysis of gross primary production in Tibetan alpine grasslands.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,119(3),466-486. |
| MLA | He, Honglin,et al."Large-scale estimation and uncertainty analysis of gross primary production in Tibetan alpine grasslands".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 119.3(2014):466-486. |
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