Evident influence of water availability on the relationship between solar-induced chlorophyll fluorescence and gross primary productivity in the alpine grasslands of the Tibetan Plateau
文献类型：期刊论文
| 作者 | Zheng, Zhoutao4; Cong, Nan4; Zhao, Guang4; Zhao, Bo4; Zhu, Yixuan4; Zhang, Yangjian3,4; Zhu, Juntao4; Zhang, Tao2; Chen, Ning1; Gao, Jie4 |
| 刊名 | INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION
 |
| 出版日期 | 2024-05-01 |
| 卷号 | 129页码:103821 |
| 关键词 | Solar-induced chlorophyll fluorescence Gross primary productivity Vegetation index Water availability Alpine grasslands |
| DOI | 10.1016/j.jag.2024.103821 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | Solar-induced chlorophyll fluorescence (SIF) is strongly physiologically associated with vegetation photosynthesis, and has been broadly employed to monitor gross primary productivity (GPP). However, for some understudied ecosystems, such as the alpine grasslands of the Tibetan Plateau (TP), it is highly uncertain about how SIF performs in tracking GPP. Here, by collecting eddy covariance-derived GPP and climatic data at four grassland sites in the TP, the performances of remotely sensed SIF products (CSIF and GOSIF) in estimating GPP at different time scales (8-day, monthly and growing season) were evaluated and compared against reflectancebased greenness vegetation indices (GVIs) and photochemical reflectance indices (PRIs). Moreover, the SIF-GPP relationship was further examined under different water conditions. The results showed that SIF performed best in tracking GPP variations at all temporal scales compared with GVIs and PRIs. With temporal aggregation, the SIF-GPP relationship was markedly enhanced. We further found that both determination coefficient (R2) values and slopes of the SIF-GPP relationship tended to be lower with decreasing soil water content or increasing vapor pressure deficit. This indicates SIF and GPP will be decoupled with aggravating water stress and their relationship is not universal under different water conditions. Morever, integrating soil water content with SIF improved GPP estimation, underscoring the vital role of water availability in influencing the SIF-GPP relationship. This study can boost our understanding on the variant SIF-GPP relationship and suggests that the regulation effect of water availability need be considered to improve the SIF-derived GPP estimation. |
| WOS关键词 | PHOTOCHEMICAL REFLECTANCE INDEX ; CARBON-DIOXIDE ; PHOTOSYNTHESIS ; TEMPERATURE ; EFFICIENCY ; DATASET ; LIGHT |
| WOS研究方向 | Remote Sensing |
| WOS记录号 | WOS:001227324500001 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/205172]  |
| 专题 | 拉萨站高原生态系统研究中心_外文论文 |
| 通讯作者 | Zhang, Yangjian |
| 作者单位 | 1.Chinese Acad Sci, Inst Appl Ecol, CAS Key Lab Forest Ecol & Management, Shenyang 110016, Peoples R China 2.Shenyang Agr Univ, Coll Agron, Shenyang 110866, Peoples R China 3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Lhasa Plateau Ecosyst Res Stn, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zheng, Zhoutao,Cong, Nan,Zhao, Guang,et al. Evident influence of water availability on the relationship between solar-induced chlorophyll fluorescence and gross primary productivity in the alpine grasslands of the Tibetan Plateau[J]. INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION,2024,129:103821. |
| APA | Zheng, Zhoutao.,Cong, Nan.,Zhao, Guang.,Zhao, Bo.,Zhu, Yixuan.,...&Sun, Yihan.(2024).Evident influence of water availability on the relationship between solar-induced chlorophyll fluorescence and gross primary productivity in the alpine grasslands of the Tibetan Plateau.INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION,129,103821. |
| MLA | Zheng, Zhoutao,et al."Evident influence of water availability on the relationship between solar-induced chlorophyll fluorescence and gross primary productivity in the alpine grasslands of the Tibetan Plateau".INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION 129(2024):103821. |
入库方式： OAI收割
来源：地理科学与资源研究所
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