Disentangling the causes of canopy height increase in managed and unmanaged temperate deciduous forests using multi-temporal airborne laser scanning

摘要

Airborne laser scanning (ALS) is a tool that can be used to monitor canopy height changes when data acquisitions are done at successive times. However, ALS is subject to some limitations in forested environments. One of these is that height growth measured between two times can be due to vertical crown growth of trees or to lateral growth of branches. The latter process gives canopy height change values unrelated to actual stem elongation.