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Estimating Volume, Biomass, and Carbon in Hedmark County, Norway Using a Profiling LiDARA profiling airborne LiDAR is used to estimate the forest resources of Hedmark County, Norway, a 27390 square kilometer area in southeastern Norway on the Swedish border. One hundred five profiling flight lines totaling 9166 km were flown over the entire county; east-west. The lines, spaced 3 km apart north-south, duplicate the systematic pattern of the Norwegian Forest Inventory (NFI) ground plot arrangement, enabling the profiler to transit 1290 circular, 250 square meter fixed-area NFI ground plots while collecting the systematic LiDAR sample. Seven hundred sixty-three plots of the 1290 plots were overflown within 17.8 m of plot center. Laser measurements of canopy height and crown density are extracted along fixed-length, 17.8 m segments closest to the center of the ground plot and related to basal area, timber volume and above- and belowground dry biomass. Linear, nonstratified equations that estimate ground-measured total aboveground dry biomass report an R(sup 2) = 0.63, with an regression RMSE = 35.2 t/ha. Nonstratified model results for the other biomass components, volume, and basal area are similar, with R(sup 2) values for all models ranging from 0.58 (belowground biomass, RMSE = 8.6 t/ha) to 0.63. Consistently, the most useful single profiling LiDAR variable is quadratic mean canopy height, h (sup bar)(sub qa). Two-variable models typically include h (sup bar)(sub qa) or mean canopy height, h(sup bar)(sub a), with a canopy density or a canopy height standard deviation measure. Stratification by productivity class did not improve the nonstratified models, nor did stratification by pine/spruce/hardwood. County-wide profiling LiDAR estimates are reported, by land cover type, and compared to NFI estimates.
Document ID
20090027836
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Nelson, Ross
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Naesset, Erik
(Norwegian Univ. of Life Sciences Norway)
Gobakken, T.
(Norwegian Univ. of Life Sciences Norway)
Gregoire, T.
(Yale Univ. New Haven, CT, United States)
Stahl, G.
(Swedish Univ. of Agricultural Science Umeaa, Sweden)
Date Acquired
August 24, 2013
Publication Date
May 19, 2009
Subject Category
Earth Resources And Remote Sensing
Meeting Information
Meeting: IUFRO Division Extending Forest Inventory and Monitoring over Space and Time
Location: Quebec City
Country: Canada
Start Date: May 19, 2009
End Date: May 22, 2009
Distribution Limits
Public
Copyright
Other

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