Effect of canopy structure on sun-induced chlorophyll fluorescence

A. Fournier; F. Daumard; S. Champagne; A. Ounis; Y. Goulas; I. Moya

doi:10.1016/j.isprsjprs.2012.01.003

Effect of canopy structure on sun-induced chlorophyll fluorescence

A. Fournier
, F. Daumard
, S. Champagne
, A. Ounis
, Y. Goulas
, I. Moya

École Polytechnique

Université Pierre et Marie Curie

Research output: Contribution to journal › Article › peer-review

Abstract

We investigated the impact of canopy structure on chlorophyll fluorescence properties. For this purpose, we developed SpectroFLEX, an instrument for quantitative measurements of canopy fluorescence in O ₂A and O ₂B atmospheric absorption bands. The fluorescence emission of a natural grass canopy was compared with the leaf level fluorescence spectrum acquired simultaneously. It was found that the red-to-far-red fluorescence ratio decreased by a factor of two from the leaf to the canopy level. In addition, this ratio decreased under high light conditions. FluoSAIL simulations were conducted to study the impact of canopy density and geometry on this decrease. This effect has been attributed to a preferential re-absorption of red fluorescence emission during radiative transfer within the canopy compared to far-red emission.

Original language	English
Pages (from-to)	112-120
Number of pages	9
Journal	ISPRS Journal of Photogrammetry and Remote Sensing
Volume	68
Issue number	1
DOIs	https://doi.org/10.1016/j.isprsjprs.2012.01.003
Publication status	Published - 1 Mar 2012

Keywords

Band infilling
Canopy structure
Chlorophyll fluorescence measurement
F687/F760 fluorescence ratio
Oxygen absorption band
Simulation

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10.1016/j.isprsjprs.2012.01.003

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title = "Effect of canopy structure on sun-induced chlorophyll fluorescence",

abstract = "We investigated the impact of canopy structure on chlorophyll fluorescence properties. For this purpose, we developed SpectroFLEX, an instrument for quantitative measurements of canopy fluorescence in O 2A and O 2B atmospheric absorption bands. The fluorescence emission of a natural grass canopy was compared with the leaf level fluorescence spectrum acquired simultaneously. It was found that the red-to-far-red fluorescence ratio decreased by a factor of two from the leaf to the canopy level. In addition, this ratio decreased under high light conditions. FluoSAIL simulations were conducted to study the impact of canopy density and geometry on this decrease. This effect has been attributed to a preferential re-absorption of red fluorescence emission during radiative transfer within the canopy compared to far-red emission.",

keywords = "Band infilling, Canopy structure, Chlorophyll fluorescence measurement, F687/F760 fluorescence ratio, Oxygen absorption band, Simulation",

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T1 - Effect of canopy structure on sun-induced chlorophyll fluorescence

AU - Fournier, A.

AU - Daumard, F.

AU - Champagne, S.

AU - Ounis, A.

AU - Goulas, Y.

AU - Moya, I.

PY - 2012/3/1

Y1 - 2012/3/1

N2 - We investigated the impact of canopy structure on chlorophyll fluorescence properties. For this purpose, we developed SpectroFLEX, an instrument for quantitative measurements of canopy fluorescence in O 2A and O 2B atmospheric absorption bands. The fluorescence emission of a natural grass canopy was compared with the leaf level fluorescence spectrum acquired simultaneously. It was found that the red-to-far-red fluorescence ratio decreased by a factor of two from the leaf to the canopy level. In addition, this ratio decreased under high light conditions. FluoSAIL simulations were conducted to study the impact of canopy density and geometry on this decrease. This effect has been attributed to a preferential re-absorption of red fluorescence emission during radiative transfer within the canopy compared to far-red emission.

AB - We investigated the impact of canopy structure on chlorophyll fluorescence properties. For this purpose, we developed SpectroFLEX, an instrument for quantitative measurements of canopy fluorescence in O 2A and O 2B atmospheric absorption bands. The fluorescence emission of a natural grass canopy was compared with the leaf level fluorescence spectrum acquired simultaneously. It was found that the red-to-far-red fluorescence ratio decreased by a factor of two from the leaf to the canopy level. In addition, this ratio decreased under high light conditions. FluoSAIL simulations were conducted to study the impact of canopy density and geometry on this decrease. This effect has been attributed to a preferential re-absorption of red fluorescence emission during radiative transfer within the canopy compared to far-red emission.

KW - Band infilling

KW - Canopy structure

KW - Chlorophyll fluorescence measurement

KW - F687/F760 fluorescence ratio

KW - Oxygen absorption band

KW - Simulation

U2 - 10.1016/j.isprsjprs.2012.01.003

DO - 10.1016/j.isprsjprs.2012.01.003

M3 - Article

AN - SCOPUS:84857013380

SN - 0924-2716

VL - 68

SP - 112

EP - 120

JO - ISPRS Journal of Photogrammetry and Remote Sensing

JF - ISPRS Journal of Photogrammetry and Remote Sensing

IS - 1

ER -

Effect of canopy structure on sun-induced chlorophyll fluorescence

Abstract

Keywords

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