Our new study is out on the use of time series of airborne laser scanner (ALS) data for monitoring the alpine treeline. The paper can be accessed here:
The paper demonstrates a method for monitoring tree occupancy, i.e., the proportion of a sampled area in which trees are present, and tree height in the alpine treeline ecotone. We used field data and ALS data from three points in time (2008, 2012 and 2018) collected along a ~1100 km transect in the Scandinavian Mountain Range.
We found that time series of ALS data are highly useful for detecting and monitoring small pioneer trees. We found no significant changes in either tree occupancy nor tree height in the observed period. The proposed method can be used to monitor alpine treeline ecotones and to provide the uncertainty of the estimates which can inform whether observed changes are in fact significant.
Eirik Næsset Ramtvedt successfully defended his doctoral thesis, “Fine-spatial radiation measurements for heterogeneous boreal–alpine and sub-alpine vegetation”, on 17 June 2022. Continue reading
Ida Marielle Mienna defended her PhD-thesis “The role of biotic and abiotic factors on treeline ecotone dynamics: studies using field observations and remote sensing” on June 3, 2022.
Ana María de Lera Garrido defended her PhD-thesis, “Application of external prediction models in forest management inventories based on airborne laser scanning”, on May 6, 2022.
We have made a seamless map of volumes and biomass based on airborne laser scanning in the forests of Oslo and Akershus. Continue reading
The Forest Inventory Research Group at UMB-INA would gradually establish new web pages under the www.forestinventory.no domain. Continue reading