Response of thematic mapper bands to plant water stress
作者:
W. G. CIBULA,
E. F. ZETKA,
D. L. RICKMAN,
期刊:
International Journal of Remote Sensing
(Taylor Available online 1992)
卷期:
Volume 13,
issue 10
页码: 1869-1880
ISSN:0143-1161
年代: 1992
DOI:10.1080/01431169208904236
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Changes in leaf reflectance as water content decreases have been hypothesized to occur in the 1 55-1.75 and 2.08-2.35 μm wavelength regions. To evaluate this hypothesis, studies were conducted on ryegrass (Lolium muitiflorumLam.) and oats (Avena salivaL.), which were grown in a controlled, outdoor situation. Both fully-watered control beds and water-stressed beds were periodically examined with a spectroradiometer calibrated against a reflectance reference of polytetrafluoroethylene. The observed changes correspond to those predicted by stochastic leaf models employed by other investigators (leaf reflection increases in the l.55-l.75μm region as leaf water content decreases). Although the percentage changes in TM bands 1-3 are nearly as great as those found in TM bands 5 and 7, the absolute values of reflectance change are much lower. We believe that these patterns are probably characteristic of a broad range of vegetation types. In terms of phenomena detection, these patterns should be considered in any practical remote sensing sensor scenario.
点击下载:
PDF (338KB)
返 回