Assessment of Vegetation Stress Using Reflectance or Fluorescence Measurements.

Autor:	Campbel, P. K. E.1 pcampbel@pop900.gsfc.nasa.gov, Middleton, E. M.2, McMurtrey, J. E.3, Corp, L. A.4, Chappelle, E. W.2
Předmět:	*Carbon dioxide *Ultraviolet radiation Remote sensing Reflectance Fluorescence Stress concentration Maple Soybean Red maple Corn Monitoring of vegetation greenness
Zdroj:	Journal of Environmental Quality. May/Jun2007, Vol. 36 Issue 3, p832-845. 14p.
Abstrakt:	This article discusses the use of remote sensing to detect vegetative stress. The authors used hyperspectral reflectance indices and fluorescence foliar measurements to measure changes in vegetation in soybeans with elevated carbon dioxide and ozone levels, corn with nitrogen deficiency or excess and red maple with augmented ultraviolet irradiation. The authors found that it was not possible to identify the unstressed vegetation condition with reflectance measurements alone, but the addition of fluorescence indices could recognize the condition in all three plants. They suggest that hyperspectral reflectance and fluorescence information could be used in future remote sensing missions to detect vegetation stress.
Databáze:	GreenFILE
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