Estimates of grassland biomass and turnover time on the Tibetan Plateau
文献类型：期刊论文
| 作者 | Xia, Jiangzhou1,2; Ma, Minna3; Liang, Tiangang4; Wu, Chaoyang5; Yang, Yuanhe6; Zhang, Li7 ; Zhang, Yangjian5; Yuan, Wenping1,2
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| 刊名 | ENVIRONMENTAL RESEARCH LETTERS
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| 出版日期 | 2018 |
| 卷号 | 13期号:1页码:12 |
| 关键词 | biomass turnover time vegetation index Tibetan Plateau random forest |
| ISSN号 | 1748-9326 |
| DOI | 10.1088/1748-9326/aa9997 |
| 通讯作者 | Yuan, Wenping(yuanwpcn@126.com) |
| 英文摘要 | The grassland of the Tibetan Plateau forms a globally significant biome, which represents 6% of the world's grasslands and 44% of China's grasslands. However, large uncertainties remain concerning the vegetation carbon storage and turnover time in this biome. In this study, we quantified the pool size of both the aboveground and belowground biomass and turnover time of belowground biomass across the Tibetan Plateau by combining systematic measurements taken from a substantial number of surveys (i.e. 1689 sites for aboveground biomass, 174 sites for belowground biomass) with a machine learning technique (i.e. random forest, RF). Our study demonstrated that the RF model is effective tool for upscaling local biomass observations to the regional scale, and for producing continuous biomass estimates of the Tibetan Plateau. On average, the models estimated 46.57 Tg (1 Tg = 10(12)g) C of aboveground biomass and 363.71 Tg C of belowground biomass in the Tibetan grasslands covering an area of 1.32 X 10(6) km(2). The turnover time of belowground biomass demonstrated large spatial heterogeneity, with a median turnover time of 4.25 years. Our results also demonstrated large differences in the biomass simulations among the major ecosystem models used for the Tibetan Plateau, largely because of inadequate model parameterization and validation. This study provides a spatially continuous measure of vegetation carbon storage and turnover time, and provides useful information for advancing ecosystem models and improving their performance. |
| WOS关键词 | GROSS PRIMARY PRODUCTION ; TERRESTRIAL ECOSYSTEMS ; CARBON STORAGE ; CHINA GRASSLANDS ; CO2 ENRICHMENT ; ROOT ; VEGETATION ; FORESTS ; MODEL ; CLIMATE |
| 资助项目 | National Key Project[2016YFA0602701] ; General Program of National Natural Science Foundation of China[31570468] ; One Hundred Person Project of Chinese Academy of Sciences[Y329k71002] ; Youth Changjiang Scholars Programme of China[Q2016161] ; National Youth Top-notch Talent Support Program |
| WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000422903600003 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | National Key Project ; General Program of National Natural Science Foundation of China ; One Hundred Person Project of Chinese Academy of Sciences ; Youth Changjiang Scholars Programme of China ; National Youth Top-notch Talent Support Program |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/56834]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Yuan, Wenping |
| 作者单位 | 1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China 2.Beijing Normal Univ, Fac Geog Sci, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China 3.Sun Yat Sen Univ, Sch Atmospher Sci, Zhuhai 519082, Guangdong, Peoples R China 4.Lanzhou Univ, Coll Pastoral Agr Sci & Technol, State Key Lab Grassland Agroecosyst, Lanzhou 730020, Gansu, Peoples R China 5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 6.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 7.Chinese Acad Sci, Inst Remote Sensing & Digital Earth, Key Lab Digital Earth Sci, Beijing 100094, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xia, Jiangzhou,Ma, Minna,Liang, Tiangang,et al. Estimates of grassland biomass and turnover time on the Tibetan Plateau[J]. ENVIRONMENTAL RESEARCH LETTERS,2018,13(1):12. |
| APA | Xia, Jiangzhou.,Ma, Minna.,Liang, Tiangang.,Wu, Chaoyang.,Yang, Yuanhe.,...&Yuan, Wenping.(2018).Estimates of grassland biomass and turnover time on the Tibetan Plateau.ENVIRONMENTAL RESEARCH LETTERS,13(1),12. |
| MLA | Xia, Jiangzhou,et al."Estimates of grassland biomass and turnover time on the Tibetan Plateau".ENVIRONMENTAL RESEARCH LETTERS 13.1(2018):12. |
入库方式： OAI收割
来源：地理科学与资源研究所
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