Seasonal variation of canopy vertical structural profiles measured at two temperate forests: intercomparison of tower, mast, crane, and UAV measurements
文献类型：期刊论文
| 作者 | Fang, Hongliang1,2; Wu, Yunjia1,2; Zhang, Yinghui1,2; Wang, Yao1,2; Li, Sijia1,2; Ma, Tian1,2; Li, Yu1,2; Guo, Keruo1,2 |
| 刊名 | TREES-STRUCTURE AND FUNCTION
 |
| 出版日期 | 2025-02-01 |
| 卷号 | 39期号:1页码:9 |
| 关键词 | Canopy gap fraction Leaf area index (LAI) Clumping index (CI) Digital hemispherical photography (DHP) Uncrewed aerial vehicle (UAV) Vertical profiles |
| ISSN号 | 0931-1890 |
| DOI | 10.1007/s00468-024-02589-4 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | The vertical distribution of canopy structural parameters, such as canopy gap fraction, leaf area index (LAI) and clumping index (CI), is important for understanding the forest structural and functional properties. However, vertically distributed canopy structural data are rare, and current methods are either inefficient or costly for obtaining sufficient amounts of such data. This study conducted a series of field campaigns to obtain forest vertical structural measurements at two temperate forest sites in northern China from 2020 to 2023. Four different measurement systems were compared: (1) flux towers with accessible platforms at different heights, (2) a portable and extensible sampling mast with a digital hemispherical photography (DHP) camera attached on top, (3) a tower crane with a DHP camera fixed on the crane hook, and (4) an uncrewed aerial vehicle (UAV) with a DHP camera attached on top. The measured effective plant area index (PAI(eff)) shows clearly seasonal variations at different heights. The CI remains relatively consistent at different heights, and the leaf-off value is approximately 0.1-0.2 higher than the leaf-on one. The flux tower method can be used for vertical profile measurement at a fixed location, whereas the portable mast is suitable for lower-level (< 15 m) measurement. Crane measurement requires an established facility and is useful for local measurement around the crane. UAV with an attached DHP provides a promising method for monitoring vertical structural parameters. The vertical structural profiles obtained in this study can be used in various modeling and validation studies. |
| URL标识 | 查看原文 |
| WOS关键词 | LEAF-AREA INDEX ; DIGITAL HEMISPHERICAL PHOTOGRAPHY ; SIZE ANALYSIS THEORY ; CLUMPING INDEX ; FOLIAGE PROFILE ; ENERGY FLUXES ; PINE FORESTS ; LAI ; COVER ; MODEL |
| WOS研究方向 | Forestry |
| 语种 | 英语 |
| WOS记录号 | WOS:001378241900001 |
| 出版者 | SPRINGER HEIDELBERG |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/211326]  |
| 专题 | 资源与环境信息系统国家重点实验室_外文论文 |
| 通讯作者 | Fang, Hongliang |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Resources & Environm, Beiing 100049, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, LREIS, Beijing 100101, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Fang, Hongliang,Wu, Yunjia,Zhang, Yinghui,et al. Seasonal variation of canopy vertical structural profiles measured at two temperate forests: intercomparison of tower, mast, crane, and UAV measurements[J]. TREES-STRUCTURE AND FUNCTION,2025,39(1):9. |
| APA | Fang, Hongliang.,Wu, Yunjia.,Zhang, Yinghui.,Wang, Yao.,Li, Sijia.,...&Guo, Keruo.(2025).Seasonal variation of canopy vertical structural profiles measured at two temperate forests: intercomparison of tower, mast, crane, and UAV measurements.TREES-STRUCTURE AND FUNCTION,39(1),9. |
| MLA | Fang, Hongliang,et al."Seasonal variation of canopy vertical structural profiles measured at two temperate forests: intercomparison of tower, mast, crane, and UAV measurements".TREES-STRUCTURE AND FUNCTION 39.1(2025):9. |
入库方式： OAI收割
来源：地理科学与资源研究所
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