Linking lidar and forest modeling to assess biomass estimation across scales and disturbance states

N Knapp, R Fischer, A Huth - Remote Sensing of Environment, 2018 - Elsevier
Light detection and ranging (lidar) is currently the state-of-the-art remote sensing
technology for measuring the 3D structures of forests. Studies have shown that various lidar-derived …

Structure metrics to generalize biomass estimation from lidar across forest types from different continents

N Knapp, R Fischer, V Cazcarra-Bes, A Huth - Remote Sensing of …, 2020 - Elsevier
Forest aboveground biomass is a key variable in remote sensing based forest monitoring.
Active sensor systems, such as lidar, can generate detailed canopy height products. …

Aboveground biomass density models for NASA's Global Ecosystem Dynamics Investigation (GEDI) lidar mission

…, E Kearsley, D Kenfack, N Kljun, N Knapp… - Remote Sensing of …, 2022 - Elsevier
NASA’s Global Ecosystem Dynamics Investigation (GEDI) is collecting spaceborne full
waveform lidar data with a primary science goal of producing accurate estimates of forest …

Tree crowns cause border effects in area-based biomass estimations from remote sensing

N Knapp, A Huth, R Fischer - Remote Sensing, 2021 - mdpi.com
The estimation of forest biomass by remote sensing is constrained by different uncertainties.
An important source of uncertainty is the border effect, as tree crowns are not constrained by …

allodb: An R package for biomass estimation at globally distributed extratropical forest plots

…, PA Jansen, DJ Johnson, N Knapp… - Methods in Ecology …, 2022 - Wiley Online Library
Allometric equations for calculation of tree above‐ground biomass (AGB) form the basis for
estimates of forest carbon storage and exchange with the atmosphere. While standard …

[HTML][HTML] Lessons learned from applying a forest gap model to understand ecosystem and carbon dynamics of complex tropical forests

…, AG Gutiérrez, M Kazmierczak, N Knapp… - Ecological …, 2016 - Elsevier
Forests worldwide are threatened by various environmental and anthropogenic hazards,
especially tropical forests. Knowledge on the impacts of these hazards on forest structure and …

Computer and remote‐sensing infrastructure to enhance large‐scale testing of individual‐based forest models

…, GP Asner, R Fischer, A Huth, N Knapp… - Frontiers in Ecology …, 2015 - Wiley Online Library
Global environmental change necessitates increased predictive capacity; for forests, recent
advances in technology provide the response to this challenge. “Next‐generation” remote‐…

The relevance of forest structure for biomass and productivity in temperate forests: New perspectives for remote sensing

R Fischer, N Knapp, F Bohn, HH Shugart, A Huth - Surveys in Geophysics, 2019 - Springer
Forests provide important ecosystem services such as carbon sequestration. Forest landscapes
are intrinsically heterogeneous—a problem for biomass and productivity assessment …

[HTML][HTML] Benchmarking airborne laser scanning tree segmentation algorithms in broadleaf forests shows high accuracy only for canopy trees

…, JGC Ball, DA Coomes, L Steinmeier, N Knapp… - International Journal of …, 2023 - Elsevier
Individual tree segmentation from airborne laser scanning data is a longstanding and important
challenge in forest remote sensing. Tree segmentation algorithms are widely available, …

From small-scale forest structure to Amazon-wide carbon estimates

E Rödig, N Knapp, R Fischer, FJ Bohn… - Nature …, 2019 - nature.com
Tropical forests play an important role in the global carbon cycle. High-resolution remote
sensing techniques, eg, spaceborne lidar, can measure complex tropical forest structures, but it …