NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Remote detection of canopy water stress in coniferous forests using the NS001 Thematic Mapper Simulator and the thermal infrared multispectral scannerWater stress was induced in two coniferous forest stands in West Germany by severing tree sapwood. Leaf water potential, Psi(L), measurements indicated that maximum, naturally occurring levels of water stress developed in the stressed plots while control plots exhibited natural diurnal trends. Images of each site were obtained with the Thematic Mapper Simulator (NS001) and the Thermal Infrared Multispectral Scanner (TIMS) 12 to 15 days after stress induction. NS001 bands 2 to 6, NS001 indices combining bands 4 and 6, and NS001 and TIMS thermal bands showed significant radiance differences between stressed and control plots when large differences in Psi(L) and relative water content (RWC) existed during the morning overflights at Munich. However, the NS001 and TIMS sensors could not detect the slightly smaller differences in Psi(L) and RWC during the Munich afternoon and Frankfurt overflights. The results suggest that routine detection of canopy water stress under operational conditions is difficult utilizing current sensor technology.
Document ID
19900049489
Document Type
Reprint (Version printed in journal)
Authors
Pierce, Lars L. (Montana Univ. Missoula, MT, United States)
Running, Steven W. (Montana Univ. Missoula, MT, United States)
Riggs, George A. (Montana, University Missoula, United States)
Date Acquired
August 14, 2013
Publication Date
May 1, 1990
Publication Information
Publication: Photogrammetric Engineering and Remote Sensing
Volume: 56
ISSN: 0099-1112
Subject Category
EARTH RESOURCES AND REMOTE SENSING
Funding Number(s)
CONTRACT_GRANT: NCA2-252
CONTRACT_GRANT: NAGW-829
Distribution Limits
Public
Copyright
Other