Publication
Title
Bidirectional sun-induced chlorophyll fluorescence emission is influenced by leaf structure and light scattering properties : a bottom-up approach
Author
Abstract
Sun-induced chlorophyll fluorescence (SIF) at leaf level is emitted in both upward and downward directions in the red and far-red part of the spectrum (650850 nm) when a leaf is illuminated from the upper leaf surface. Hence, total SIF is represented by the sum of the upward and downward emission components. Nevertheless, the downward component of leaf SIF is often not considered despite that downward fluorescence yield (↓FY) can amount up to 40% of the total fluorescence yield (FYtot). Downward SIF is mainly emitted in the far-red, since this part of fluoresced light is highly scattered within leaves, unlike red Chl fluorescence, which is mostly reabsorbed. While total FY can be quite different among distinct species, the relative partitioning between upward and downward fluorescence shows more similarities among different leaf types, especially in the far-red. It is shown that bidirectional SIF emission properties in the far-red can be attributed to the scattering properties of the leaf, whereby an equifacial leaf follows a different trend compared to bifacial leaves. This was done by comparing SIF data with simultaneously measured reflectance, transmittance and fluorescence data by means of the FluoWat leaf clip coupled with an ASD hyperspectral spectroradiometer. These results could further improve Chl fluorescence modeling at leaf level, and help to advance the interpretation of SIF at the canopy level.
Language
English
Source (journal)
Remote sensing of environment. - Ann Arbor, Mich.
Publication
Ann Arbor, Mich. : 2015
ISSN
0034-4257
Volume/pages
158(2015), p. 169-179
ISI
000348879100013
Full text (Publisher's DOI)
Full text (open access)
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Research group
[E?say:metaLocaldata.cgzprojectinf]
Biomonitoring of the urban habitat quality using hyperspectral aircraft observations (BIOHYPE).
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 07.04.2015
Last edited 11.09.2017
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