Evaluation of Clumping Effects on the Estimation of Global Terrestrial Evapotranspiration
文献类型：期刊论文
| 作者 | Chen, Bin9; Lu, Xuehe1; Wang, Shaoqiang2,9,10; Chen, Jing M.3,4; Liu, Yang5; Fang, Hongliang5,10; Liu, Zhenhai2; Jiang, Fei6; Arain, Muhammad Altaf7,8; Chen, Jinghua9 |
| 刊名 | REMOTE SENSING
 |
| 出版日期 | 2021-10-01 |
| 卷号 | 13期号:20页码:24 |
| 关键词 | canopy structural parameters canopy radiation transfer two-leaf model evapotranspiration clumping index leaf area index |
| DOI | 10.3390/rs13204075 |
| 通讯作者 | Wang, Shaoqiang(sqwang@igsnrr.ac.cn) |
| 英文摘要 | In terrestrial ecosystems, leaves are aggregated into different spatial structures and their spatial distribution is non-random. Clumping index (CI) is a key canopy structural parameter, characterizing the extent to which leaf deviates from the random distribution. To assess leaf clumping effects on global terrestrial ET, we used a global leaf area index (LAI) map and the latest version of global CI product derived from MODIS BRDF data as well as the Boreal Ecosystem Productivity Simulator (BEPS) to estimate global terrestrial ET. The results show that global terrestrial ET in 2015 was 511.9 & PLUSMN; 70.1 mm yr(-1) for Case I, where the true LAI and CI are used. Compared to this baseline case, (1) global terrestrial ET is overestimated by 4.7% for Case II where true LAI is used ignoring clumping; (2) global terrestrial ET is underestimated by 13.0% for Case III where effective LAI is used ignoring clumping. Among all plant functional types (PFTs), evergreen needleleaf forests were most affected by foliage clumping for ET estimation in Case II, because they are most clumped with the lowest CI. Deciduous broadleaf forests are affected by leaf clumping most in Case III because they have both high LAI and low CI compared to other PFTs. The leaf clumping effects on ET estimation in both Case II and Case III is robust to the errors in major input parameters. Thus, it is necessary to consider clumping effects in the simulation of global terrestrial ET, which has considerable implications for global water cycle research. |
| WOS关键词 | LEAF-AREA INDEX ; NET PRIMARY PRODUCTIVITY ; CANOPY PHOTOSYNTHESIS ; PLANT CANOPIES ; WATER ; MODEL ; MODIS ; SATELLITE ; FLUXES ; ENERGY |
| 资助项目 | Research and Development Project of Scientific Instruments and Equipment of the Chinese Academy of Sciences ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; National Key Research and Development Program from Ministry of Science and Technology, China ; National Natural Science Foundation of China |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology |
| 语种 | 英语 |
| WOS记录号 | WOS:000716389500001 |
| 出版者 | MDPI |
| 资助机构 | Research and Development Project of Scientific Instruments and Equipment of the Chinese Academy of Sciences ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; National Key Research and Development Program from Ministry of Science and Technology, China ; National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/167663]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Wang, Shaoqiang |
| 作者单位 | 1.Suzhou Univ Sci & Technol, Sch Geog Sci & Geomat Engn, Suzhou 215009, Peoples R China 2.China Univ Geosci, Coll Geog & Informat Engn, Wuhan 430074, Peoples R China 3.Fujian Normal Univ, Sch Geog Sci, Fuzhou 350117, Peoples R China 4.Univ Toronto, Dept Geog & Program Planning, Toronto, ON M5S 3G3, Canada 5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing 100101, Peoples R China 6.Nanjing Univ, Int Inst Earth Syst Sci, Nanjing 210023, Peoples R China 7.McMaster Univ, Sch Earth Environm & Soc, Hamilton, ON L8S 4K1, Canada 8.McMaster Univ, McMaster Ctr Climate Change, Hamilton, ON L8S 4K1, Canada 9.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 10.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Bin,Lu, Xuehe,Wang, Shaoqiang,et al. Evaluation of Clumping Effects on the Estimation of Global Terrestrial Evapotranspiration[J]. REMOTE SENSING,2021,13(20):24. |
| APA | Chen, Bin.,Lu, Xuehe.,Wang, Shaoqiang.,Chen, Jing M..,Liu, Yang.,...&Wang, Xiaobo.(2021).Evaluation of Clumping Effects on the Estimation of Global Terrestrial Evapotranspiration.REMOTE SENSING,13(20),24. |
| MLA | Chen, Bin,et al."Evaluation of Clumping Effects on the Estimation of Global Terrestrial Evapotranspiration".REMOTE SENSING 13.20(2021):24. |
入库方式： OAI收割
来源：地理科学与资源研究所
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