Characterization of the layered SIF distribution through hyperspectral observation and SCOPE modeling for a subtropical evergreen forest
文献类型：期刊论文
| 作者 | Zhu, Kai; Chen, Jinghua; Wang, Shaoqiang; Fang, Hongliang; Chen, Bin; Zhang, Leiming; Li, Yuelin; Zheng, Chen; Amir, Muhammad |
| 刊名 | ISPRS JOURNAL OF PHOTOGRAMMETRY AND REMOTE SENSING
 |
| 出版日期 | 2023-07-01 |
| 卷号 | 201页码:78-91 |
| 关键词 | Solar -induced chlorophyll fluorescence Subtropical evergreen forest Radiative transfer Vertical heterogeneity Understory |
| ISSN号 | 1872-8235 |
| DOI | 10.1016/j.isprsjprs.2023.05.014 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | Solar-induced chlorophyll fluorescence (SIF) has been widely used as a prospective proxy of plant photosynthesis to accurately detect the response of vegetation to climate change and study terrestrial ecosystem carbon cycle. However, the challenge of estimating vegetation gross primary product (GPP) based on SIF observations remains unresolved due to the confounding effects of leaf physiology and canopy structure, especially the vertical het-erogeneity of plant attributes. Radiative transfer models are ideally suited to investigate the variability in radiance signals including fluorescence, but previous studies lack vertically layered spectra to validate the model. In this study, we developed a vertically layered hyperspectral system and proposed an innovative framework for assessing vertical characteristics of SIF and improving the estimation of GPP based on SIF in a subtropical evergreen forest. The global sensitivity analysis on Soil-Canopy-Observation of Photosynthesis and Energy fluxes (SCOPE) model with vertical profiles showed that chlorophyll content (Cab), leaf inclination distribution (LIDFa), leaf area index (LAI), and senescent material (Cs) dominate the vertical variations in reflectance (Ref) and SIF. We found that the vertical characteristics of SIF were mainly impacted by these parameters of the adjacent vertical layer, except for the effects of LAI across the vertical layers on the observed understory SIFU, which were approximately equivalent. 7.8 & PLUSMN; 1.7% of the SIFU was transferred to the top of canopy, contributing up to 17% of the SIF observed on the top of canopy (SIFTOC) during the year. Furthermore, our findings suggest that substituting the observed SIFTOC with the total emitted SIF, particularly from the simulated overstory and understory SIF, could enhance the correlation between GPP and SIF with an increased R2 (& UDelta;R2 = 0.09). This study highlights the importance of accounting for the contribution of the layered SIF in the quantification of the total SIF emission and can benefit the GPP estimation based on SIF signals in subtropical evergreen forests with high canopy density. |
| 学科主题 | Physical Geography ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology |
| WOS关键词 | INDUCED CHLOROPHYLL FLUORESCENCE ; SENSITIVITY-ANALYSIS ; FIELD SPECTROSCOPY ; CANOPY ; PHOTOSYNTHESIS ; LEAF ; RETRIEVAL ; REFLECTANCE ; FLUXES ; LIGHT |
| WOS研究方向 | Physical Geography ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/193861]  |
| 专题 | 生态系统网络观测与模拟院重点实验室_外文论文 |
| 作者单位 | 1.University of Chinese Academy of Sciences, CAS 2.Chinese Academy of Sciences 3.Institute of Geographic Sciences & Natural Resources Research, CAS 4.China University of Geosciences 5.South China Botanical Garden, CAS |
| 推荐引用方式 GB/T 7714 | Zhu, Kai,Chen, Jinghua,Wang, Shaoqiang,et al. Characterization of the layered SIF distribution through hyperspectral observation and SCOPE modeling for a subtropical evergreen forest[J]. ISPRS JOURNAL OF PHOTOGRAMMETRY AND REMOTE SENSING,2023,201:78-91. |
| APA | Zhu, Kai.,Chen, Jinghua.,Wang, Shaoqiang.,Fang, Hongliang.,Chen, Bin.,...&Amir, Muhammad.(2023).Characterization of the layered SIF distribution through hyperspectral observation and SCOPE modeling for a subtropical evergreen forest.ISPRS JOURNAL OF PHOTOGRAMMETRY AND REMOTE SENSING,201,78-91. |
| MLA | Zhu, Kai,et al."Characterization of the layered SIF distribution through hyperspectral observation and SCOPE modeling for a subtropical evergreen forest".ISPRS JOURNAL OF PHOTOGRAMMETRY AND REMOTE SENSING 201(2023):78-91. |
入库方式： OAI收割
来源：地理科学与资源研究所
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