气候变化领域集成服务门户(CCPortal): Terrestrial laser scanning intensity captures diurnal variation in leaf water potential

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DOI	10.1016/j.rse.2020.112274
	Terrestrial laser scanning intensity captures diurnal variation in leaf water potential
	Junttila S.; Hölttä T.; Puttonen E.; Katoh M.; Vastaranta M.; Kaartinen H.; Holopainen M.; Hyyppä H.
发表日期	2021
ISSN	00344257
卷号	255
英文摘要	During the past decades, extreme events have become more prevalent and last longer, and as a result drought-induced plant mortality has increased globally. Timely information on plant water dynamics is essential for understanding and anticipating drought-induced plant mortality. Leaf water potential (ΨL), which is usually measured destructively, is the most common metric that has been used for decades for measuring water stress. Remote sensing methods have been developed to obtain information on water dynamics from trees and forested landscapes. However, the spatial and temporal resolutions of the existing methods have limited our understanding of the water dynamics and diurnal variation of ΨL within single trees. Thus, we investigated the capability of terrestrial laser scanning (TLS) intensity in observing diurnal variation in ΨL during a 50-h monitoring period. We aimed to improve the understanding on how large a part of the diurnal variation in ΨL can be captured using TLS intensity observations. We found that TLS intensity at the 905 nm wavelength measured from a static position was able to explain 77% of the variation in ΨL for three trees of two tree species with a root mean square error of 0.141 MPa. Based on our experiment with three trees, a time series of TLS intensity measurements can be used in detecting changes in ΨL, and thus it is worthwhile to expand the investigations to cover a wider range of tree species and forests and further increase our understanding of plant water dynamics at wider spatial and temporal scales. © 2020 The Author(s)
英文关键词	Diurnal variation; Drought; Leaf water content; Leaf water potential; Lidar intensity; Plant water dynamics; Terrestrial laser scanning; Tree health
语种	英语
scopus关键词	Drought; Dynamics; Forestry; Laser applications; Mean square error; Plants (botany); Remote sensing; Steel beams and girders; Forested landscapes; Intensity measurements; Leaf water potential; Monitoring periods; Root mean square errors; Spatial and temporal resolutions; Spatial and temporal scale; Terrestrial laser scanning; Surveying instruments
来源期刊	Remote Sensing of Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178969
作者单位	School of Forest Sciences, University of Eastern Finland, Yliopistokatu 7, Joensuu, 80101, Finland; Department of Forest Sciences, University of Helsinki, Helsinki, 00014, Finland; Department of Remote Sensing and Photogrammetry, Finnish Geospatial Research Institute, National Land Survey of Finland (NLS), Masala, 02431, Finland; Institute of Mountain Science, Shinshu University, 8304, Minamiminowa-Village, Kamiina-County, Nagano, 399-4598, Japan; Department of Geography and Geology, University of Turku, Turku, 20500, Finland; Department of Built Environment, School of Engineering, Aalto University, Espoo, 02150, Finland
推荐引用方式 GB/T 7714	Junttila S.,Hölttä T.,Puttonen E.,et al. Terrestrial laser scanning intensity captures diurnal variation in leaf water potential[J],2021,255.
APA	Junttila S..,Hölttä T..,Puttonen E..,Katoh M..,Vastaranta M..,...&Hyyppä H..(2021).Terrestrial laser scanning intensity captures diurnal variation in leaf water potential.Remote Sensing of Environment,255.
MLA	Junttila S.,et al."Terrestrial laser scanning intensity captures diurnal variation in leaf water potential".Remote Sensing of Environment 255(2021).