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Record Details

Record 96 of 20998
Analysis of the dielectric properties of trunk wood in dominant conifer species from New England and Siberia
Author and Affiliation:
Ranson, K. J.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Rock, B. N.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Salas, W. A.(New Hampshire Univ., Durham, United States)
Smith, K.(Northeastern Forest Experiment Station, Durham, NH, United States)
Williams, D. L.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Abstract: Data were collected for dominant conifer species. Dielectric properties of trunk wood were measured using a C-band dielectric probe. For certain specimens, electrical resistance was also measured using a shigometer. The water status of the trees studies was determined either by use of a Scholander pressure chamber on branch samples collected simultaneously with dielectric measurements or by fresh-weight/dry-weight assessment of wood core samples extracted and analyzed with the dielectric probe and shigometer. Diurnal delectric properties and xylem water column tension are inversely correlated such that real and imaginary dielectric values drop as tension increases. The dielectric properties were positively correlated with wood core moisture content while electrical resistance was poorly correlated with wood core moisture content in one species studied. Results support the view that dielectric properties are strongly correlated with moisture status in trunk wood, and possibly ion concentrations associated with decay processes in damaged specimens.
Publication Date: Jan 01, 1992
Document ID:
19930063906
(Acquired Dec 28, 1995)
Accession Number: 93A47903
Subject Category: EARTH RESOURCES AND REMOTE SENSING
Document Type: Conference Paper
Publication Information: In: IGARSS '92; Proceedings of the 12th Annual International Geoscience and Remote Sensing Symposium, Houston, TX, May 26-29, 1992. Vol. 2 (A93-47551 20-43); p. 1283-1285.; (SEE A93-47551)
Publisher Information: Institute of Electrical and Electronics Engineers, Inc., New York, United States
Contract/Grant/Task Num: RTOP 665-3100
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
NASA; Washington, DC, United States
Description: 3p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: CONIFERS; DIELECTRIC PROPERTIES; WOOD; C BAND; SIBERIA; UNITED STATES
Imprint And Other Notes: In: IGARSS '92; Proceedings of the 12th Annual International Geoscience and Remote Sensing Symposium, Houston, TX, May 26-29, 1992. Vol. 2 (A93-47551 20-43), p. 1283-1285.
Availability Source: Other Sources
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