Junttila , S , Kaasalainen , S , Vastaranta , M , Hakala , T , Nevalainen , O & Holopainen , M 2015 , ' Investigating Bi-Temporal Hyperspectral Lidar Measurements from Declined Trees - Experiences from Laboratory Test ' , Remote Sensing , vol. 7 , no. 10 , pp. 13863-13877 . https://doi.org/10.3390/rs71013863
Title: | Investigating Bi-Temporal Hyperspectral Lidar Measurements from Declined Trees - Experiences from Laboratory Test |
Author: | Junttila, Samuli; Kaasalainen, Sanna; Vastaranta, Mikko; Hakala, Teemu; Nevalainen, Olli; Holopainen, Markus |
Contributor organization: | Department of Forest Sciences Laboratory of Forest Resources Management and Geo-information Science Forest Health Group Forest Ecology and Management |
Date: | 2015-10 |
Language: | eng |
Number of pages: | 15 |
Belongs to series: | Remote Sensing |
ISSN: | 2072-4292 |
DOI: | https://doi.org/10.3390/rs71013863 |
URI: | http://hdl.handle.net/10138/159320 |
Abstract: | Global warming is posing a threat to the health and condition of forests as the amount and length of biotic and abiotic disturbances increase. Most methods for detecting disturbances and measuring forest health are based on multi- and hyperspectral imaging. We conducted a test with spruce and pine trees using a hyperspectral Lidar instrument in a laboratory to determine the capability of combined range and reflectance measurements to investigate forest health. A simple drought treatment was conducted by leaving the harvested trees outdoors without a water supply for 12 days. The results showed statistically significant variation in reflectance after the drought treatment for both species. However, the changes differed between the species, indicating that drought-induced alterations in spectral characteristics may be species-dependent. Based on our results, hyperspectral Lidar has the potential to detect drought in spruce and pine trees. |
Subject: |
Lidar
hyperspectral sensors forest health drought declined trees laser scanning forestry TEMPERATURE CONDITION INDEXES LEAF-AREA INDEX CLIMATE-CHANGE WATER-CONTENT DROUGHT STRESS SPECTRAL REFLECTANCE CHLOROPHYLL CONTENT NATIONAL-FOREST LIQUID WATER AVHRR DATA 4112 Forestry 1172 Environmental sciences |
Peer reviewed: | Yes |
Rights: | cc_by |
Usage restriction: | openAccess |
Self-archived version: | publishedVersion |
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