DocumentCode :
299122
Title :
Dielectric and hydraulic response of selected forest canopies at the BOREAS test sites in Canada
Author :
McDonald, Kyle C. ; Zimmermann, Reiner ; Oren, Ram ; Way, JoBea
Author_Institution :
Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA
Volume :
2
fYear :
34881
fDate :
10-14 Jul1995
Firstpage :
1204
Abstract :
The Boreal Ecosystem-Atmosphere Study (BOREAS) is a multidisciplinary field and remote sensing study the goal of which is to obtain an improved understanding of the interactions between the boreal forest biome and the atmosphere in order to clarify their roles in global change. The two principal BOREAS field sites, both located within Canada, are located in the southern boreal ecotone, encompassing Prince Albert National Park, Saskatchewan, and in the northern boreal ecotone near Thompson, Manitoba. This paper presents a very brief synopsis of measurements that were performed at the BOREAS experiment sites to examine the dielectric and hydraulic properties of several tree species within these sites. The authors installed instrumentation designed to allow characterization of the hydraulic response of the vegetation in five stands within the BOREAS area. The five selected stands were: (1) Old Black Spruce, (2) Old Black Spruce, (3) Old Aspen, (4) Old Jack Pine and (5) Young Jack Pine. Within each stand, xylem water flux and bole temperature were monitored in several trees. Microclimate and transpiration measurements were supplemented with mid-canopy air temperature and relative humidity observations to allow calculation of mid-canopy vapor pressure deficit. Also, soil temperature was monitored at various depths to obtain temperature profiles. These measurements were obtained continuously in most of the stands throughout most of 1994. Xylem water potential was also monitored at various times throughout the season. This work has especial importance for radar remote sensing
Keywords :
backscatter; forestry; geophysical techniques; radar cross-sections; remote sensing by radar; spaceborne radar; Aspen; BOREAS test site; Black Spruce; Canada; Jack Pine; Manitoba; Prince Albert National Park; Saskatchewan; Thompson; bole temperature; boreal forest forestry; dielectric property; forest canopy; geophysical measurement technique; hydraulic properties; hydraulic response; radar remote sensing; transpiration; tree; vegetation mapping; xylem water flux; Atmosphere; Atmospheric measurements; Dielectric measurements; Lifting equipment; Performance evaluation; Remote monitoring; Remote sensing; Soil measurements; Temperature measurement; Temperature sensors;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Geoscience and Remote Sensing Symposium, 1995. IGARSS '95. 'Quantitative Remote Sensing for Science and Applications', International
Conference_Location :
Firenze
Print_ISBN :
0-7803-2567-2
Type :
conf
DOI :
10.1109/IGARSS.1995.521184
Filename :
521184
Link To Document :
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