HR: 08:00h
AN: B41E-01 [Abstracts]
TI: Rapid Retrieval of Forest Structure using an Under-Canopy, Upward-Scanning Lidar (EchinaR)
AU: * Strahler, A H
EM: alan@bu.edu
AF: Boston University, Dept. of Geog. & Environ.
675 Commonwealth Ave, Boston, MA 02215, United States
AU: Woodcock, C E
EM: curtis@bu.edu
AF: Boston University, Dept. of Geog. & Environ.
675 Commonwealth Ave, Boston, MA 02215, United States
AU: Schaaf, C B
EM: schaaf@bu.edu
AF: Boston University, Dept. of Geog. & Environ.
675 Commonwealth Ave, Boston, MA 02215, United States
AU: Myneni, R
EM: rymneni@bu.edu
AF: Boston University, Dept. of Geog. & Environ.
675 Commonwealth Ave, Boston, MA 02215, United States
AU: Ni-Meister, W
EM: Wenge.Ni-Meister@hunter.cuny.edu
AF: Hunter College of CUNY, Dept. of Geography
695 Park Avenue, New York, NY 10021-5024, United States
AU: Liu, J
EM: jcliu@bu.edu
AF: Boston University, Dept. of Geog. & Environ.
675 Commonwealth Ave, Boston, MA 02215, United States
AU: Newnham, G J
EM: Glenn.Newnham@ensisjv.com
AF: Ensis, Bayview Avenue, Clayton, Vic 3168, Australia
AU: Culvenor, D S
EM: Darius.Culvenor@ensisjv.com
AF: Ensis, Bayview Avenue, Clayton, Vic 3168, Australia
AU: Jupp, D L
EM: David.Jupp@csiro.au
AF: CSIRO Marine & Atmo Sci, CS Christian Building
CSIRO Laboratories
Clunies Ross Street, Black Mountain, ACT 2601, Australia
AU: Lovell, J L
EM: Jenny.Lovell@csiro.au
AF: CSIRO Marine & Atmo Sci, CS Christian Building
CSIRO Laboratories
Clunies Ross Street, Black Mountain, ACT 2601, Australia
AU: Yao, T
EM: tianyao@bu.edu
AF: Boston University, Dept. of Geog. & Environ.
675 Commonwealth Ave, Boston, MA 02215, United States
AU: Zhao, F
EM: zhao26@bu.edu
AF: Boston University, Dept. of Geog. & Environ.
675 Commonwealth Ave, Boston, MA 02215, United States
AU: Yang, X
EM: xiaoyuan@bu.edu
AF: Boston University, Dept. of Geog. & Environ.
675 Commonwealth Ave, Boston, MA 02215, United States
AU: Zhang, Q
EM: zql@bu.edu
AF: Boston University, Dept. of Geog. & Environ.
675 Commonwealth Ave, Boston, MA 02215, United States
AU: Zhang, Y
EM: yingzhang@bu.edu
AF: Boston University, Dept. of Geog. & Environ.
675 Commonwealth Ave, Boston, MA 02215, United States
AU: Schull, M
EM: schull@bu.edu
AF: Boston University, Dept. of Geog. & Environ.
675 Commonwealth Ave, Boston, MA 02215, United States
AU: Roman, M
EM: mroman@bu.edu
AF: Boston University, Dept. of Geog. & Environ.
675 Commonwealth Ave, Boston, MA 02215, United States
AU: Lee, S
EM: shihyanlee@yahoo.com
AF: Hunter College of CUNY, Dept. of Geography
695 Park Avenue, New York, NY 10021-5024, United States
AU: Wang, Z
EM: wangzhs@bu.edu
AF: Boston University, Dept. of Geog. & Environ.
675 Commonwealth Ave, Boston, MA 02215, United States
AU: Shuai, Y
EM: shuaiym@bu.edu
AF: Boston University, Dept. of Geog. & Environ.
675 Commonwealth Ave, Boston, MA 02215, United States
AB:
An under-canopy, upward-scanning, lidar field instrument, named EchidnaR, provides rapid, accurate, and
automated measurements of forest stand structure, including tree diameters, stand basal area, stems per unit
area, stand height, leaf area index, foliage profile, and foliage area volume density. We report results from scans
at stands of varying characteristics at Harvard Forest (Massachusetts), Howland Experimental Forest (Maine),
and Bartlett Experimental Forest (New Hampshire). Retrievals of stand characteristics are validated by ground
measurements of tree stems in a large circular plot centered on the scan position; of canopy characteristics by
LAI-2000 measurements, hemispherical digital photographs, and allometric calculations. The EchidnaR
instrument, built by CSIRO and Ensis Australia, directs a horizontal 1064 nm laser beam with 5 mr divergence
and a pulse rate of 2 kHz to a rotating mirror at 45° incidence to scan a vertical circle, recording data from +137° to
–130° zenith angles and all azumuths as the instrument revolves 180° on a tripod mount. The return signal is
sampled at 2 gigasamples per second, digitizing the full scattered waveform. The shape of the return pulse
distinguishes readily between hard targets (tree boles, branches) and soft targets (leaves), and also measures
the distribution of canopy gaps, including within-crown and between-crown gaps. The instrument is well-suited to
ground sampling for calibration of airborne lidars, allowing accurate mapping of biomass and leaf area over large
areas.
DE: 0414 Biogeochemical cycles, processes, and modeling (0412, 0793, 1615, 4805, 4912)
DE: 0428 Carbon cycling (4806)
DE: 0439 Ecosystems, structure and dynamics (4815)
DE: 0452 Instruments and techniques
DE: 0480 Remote sensing
SC: Biogeosciences [B]
MN: 2007 Fall Meeting