Understanding the role of phenology and summer physiology in controlling net ecosystem production: a multiscale comparison of satellite, PhenoCam and eddy covariance data
文献类型：期刊论文
| 作者 | Liu, Ying1,2; Wu, Chaoyang1,2 |
| 刊名 | ENVIRONMENTAL RESEARCH LETTERS
 |
| 出版日期 | 2020-10-01 |
| 卷号 | 15期号:10页码:15 |
| 关键词 | physiology phenology NEP remote sensing PhenoCam flux |
| ISSN号 | 1748-9326 |
| DOI | 10.1088/1748-9326/abb32f |
| 通讯作者 | Wu, Chaoyang(wucy@igsnrr.ac.cn) |
| 英文摘要 | Understanding the temporal and spatial variability (SV) of net ecosystem productivity (NEP) is critical for coupling ecosystem carbon (C) cycle and climate system. Previous studies have shown responses of NEP to changes of plant phenology, but impacts of summer physiological status on annual NEP and how this may vary across different ecosystems and spatial scales were largely unknown. Combining large regional satellite derived indices (MODIS), 676 site-year local data (FLUXDATA) covering seven vegetation types, and 57 site-year regional data (PhenoCam), we found that phenological metrics and summer physiological indicators were significantly correlated with their respective gross primary production-based estimates. The interannual variability of NEP was mostly explained by summer physiology than phenology for most ecosystems, while phenology showed a better performance than summer physiology only for grassland sites. In comparison, inconsistent results were derived from three scales when explaining the SV of NEP. Summer physiology showed more potential in interpreting the SV of NEP at large regional scale, but both physiology and the length of growing season exhibited similar performances at local scale. Observations from regional scale were not able to explain NEP, given that the green chromatic coordinate signal cannot track photosynthesis in summer with a high canopy closure. The finding highlights the important role of summer physiology in controlling the C accumulation of terrestrial ecosystems and understanding the responses of summer physiology to environmental drivers is of great significance for improving the simulation accuracy of C sequestration under the global climate change. |
| WOS关键词 | GROWING-SEASON LENGTH ; DIGITAL REPEAT PHOTOGRAPHY ; GROSS PRIMARY PRODUCTIVITY ; LAND-SURFACE PHENOLOGY ; INTERANNUAL VARIABILITY ; CLIMATE-CHANGE ; VEGETATION PHENOLOGY ; SPRING PHENOLOGY ; SEMIARID ECOSYSTEMS ; DECIDUOUS FOREST |
| 资助项目 | National Key R& D program of China[2018YFA0606101] ; National Natural Science Foundation of China[41871255] ; key Research Program of Frontier Sciences, CAS[QYZDB-SSW-DQC011] |
| WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000578327100001 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | National Key R& D program of China ; National Natural Science Foundation of China ; key Research Program of Frontier Sciences, CAS |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/157127]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Wu, Chaoyang |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Ying,Wu, Chaoyang. Understanding the role of phenology and summer physiology in controlling net ecosystem production: a multiscale comparison of satellite, PhenoCam and eddy covariance data[J]. ENVIRONMENTAL RESEARCH LETTERS,2020,15(10):15. |
| APA | Liu, Ying,&Wu, Chaoyang.(2020).Understanding the role of phenology and summer physiology in controlling net ecosystem production: a multiscale comparison of satellite, PhenoCam and eddy covariance data.ENVIRONMENTAL RESEARCH LETTERS,15(10),15. |
| MLA | Liu, Ying,et al."Understanding the role of phenology and summer physiology in controlling net ecosystem production: a multiscale comparison of satellite, PhenoCam and eddy covariance data".ENVIRONMENTAL RESEARCH LETTERS 15.10(2020):15. |
入库方式： OAI收割
来源：地理科学与资源研究所
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