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Open Access item Progress on the development of an integrated canopy fluorescence model
|Authors:||Miller, J. R.|
Mohammed, G. H.
Zarco-Tejada, Pablo J.
|Keywords:||Solar-induced fluorescence,, Modelling, Vegetation|
|Abstract:||Typical environmental plant stress factors are excess of
light, deficiencies of water and nutrients, temperature extremes,
diseases, pests and pollutants. An early indicator for vegetation
status and vitality by means of remote sensing would therefore
serve a range of applications such as renewable resource
management and precision farming. Vegetation fluorescence is a
direct indicator for plant physiology, and could therefore be used
as an early indicator for vegetation health status and vitality.
Vegetation chlorophyll fluorescence is a function of
photochemical processes and efficiency, which are directly linked
to primary productivity and CO2 flux from the atmosphere, and
could therefore also provide a means to assess the terrestrial
A study was launched in October 2002 by the European Space
Agency to advance the underlying science of a possible future
vegetation fluorescence space mission by addressing the need for
an integrated canopy fluorescence model. The objective of this
study is to review and advance existing fluorescence models at the
leaf level and to integrate these into canopy models in order to
simulate the combined spectral reflected radiance and passive
fluorescence emission signals. This model is to be validated with
new and existing field campaign measurements.
This paper reports on the status of this project. The input
radiometric and photosynthetic variables have been selected to
define the vegetation fluorescence signal consisting of far-red and
red chlorophyll fluorescence as spectral emission features,
normalized to the canopy illumination levels, when linked to the
leaf-level fluorescence reflectance-transmittance model defined in
this study. Measurement protocols to validate fluorescence-leaf
models will be defined|
|Description:||2003 - International Geoscience and Remote Sensing Symposium, IGARSS'03, pp. 601-603 Vol.1, Toulouse (France), 21-25/7/2004|
|Appears in Collections:||(IAS) Comunicaciones congresos|
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