Water Stress and Fluorescence Detection in Crop Water Stress and Fluorescence Detection in Crop Canopies with AHS Thermal Imagery: simulations Canopies with AHS Thermal Imagery: simulations

with FluorMODwith FluorMOD

Airborne Imaging Spectroscopy Workshop7 Oct 2005 - Bruges - Belgium

BruHyp’05

P.J. Zarco-Tejada, G. Sepulcre-Cantó, O. Pérez-Priego, J.R. Miller, J.A. Sobrino, J.C. Jiménez-Muñoz

IAS/CSIC INTA York University

y = 1.12x + 0.97R2 = 0.57-2

0

2

4

-2 0 2 4

T c-TR IRT( K)

Tc-T

R A

HS

(K) 12:30

y = 0.42x + 0.34R2 = 0.45

-2

-1

1

2

3

-2 -1 1 2 3

T c-TR IRT (K)

Tc-T

R A

HS

(K)

9:30

y = 0.86x + 0.07R2 = 0.50

-1

0

1

-1 0 1

T c-TR IRT (K)

Tc-T

R A

HS

(K)

7:30

7:30 9:30 12:30

y = -0.70x - 1.18r2 = 0.62

-3.00

-2.50

-2.00

-1.50

-1.00

-0.50

0.00

0 1 2Tc-Ta AHS (K)

Ψ(M

Pa)

Tree Crown Temperature from 3 Image Acquisitions

Water stress detection at the crown level relationship with water potential

< 2> 2

Tc-TR(K)7:30 9:30 12:30

<11-4>4

Tc-Ta (K)

Irradiance and crown radiance measured with very high spectral detail inside the O2-A (760.5 nm) and O2-B (687 nm) bands

Spectral calculation of reflectance from irradiance and vegetation radiance spectra, showing a peak or in-filling at the oxygen bands

Spectral Measurements of Fluor In-filling

Zarco-Tejada et al., in press

FluorMOD Simulation: Fluorescence Effects on Reflectance

Fluorescence Effects on Leaf Reflectance

Fluorescence Effects on Canopy Reflectance