Canopy level solar induced fluorescence for vegetation in controlled experiments

Simple item page
dc.contributor.authorMiddleton, E.M.
dc.contributor.authorCorp, L.A.
dc.contributor.authorCampbell, Petya Entcheva
dc.date.accessioned2023-07-13T00:00:51Z
dc.date.available2023-07-13T00:00:51Z
dc.date.issued2008-01-07
dc.description2007 IEEE International Geoscience and Remote Sensing Symposium, 23-28 July 2007, Barcelona, Spainen_US
dc.description.abstractSolar induced chlorophyll fluorescence (SIF) was retrieved from high resolution canopy reflectance spectra acquired with an Analytical Spectral Devices (ASD) FieldSpec spectroradiometer one meter above tree sapling canopies. Three deciduous tree species were examined during four measurement periods, spanning the two growing seasons in 2005 and 2006: tulip poplar (Liriodendron tulipifera L.), red maple (Acer rubrum L.), and sweet gum (Liquidambar styraciflua L.). The Fraunhofer Line Depth (FLD) principal was applied to above-canopy spectra for SIF retrievals at the two atmospheric oxygen (O₂ ) absorption features that occur in the chlorophyll fluorescence (ChlF) region (660-780 nm). The broader and deeper telluric feature centered at 760 nm, O₂ alpha, enables retrievals of SIF760 on the shoulder of the far-red ChlF peak. O₂ beta, although a narrower feature, is well positioned for SIF retrieval at 688 nm (SIF688) near the red ChlF peak. Canopy-level SIF688 for tree saplings varied between 1.1 and 2.9 (plusmn 0.3) mW m ⁻² nm ⁻¹ sr¹ while SIF760 varied between 0.5 and 1.3 (plusmn 0.15) mW m ⁻² nm ⁻¹ sr ⁻¹ . Typical values for the SIF red/far-red ratio (SIF688 / SIF760) ranged between 1.45 and 6.9, with the highest values observed in autumn. Contemporary canopy and leaf level measurements (e.g., fluorescence, F; reflectance; photosynthesis) were obtained. Leaf-level ChlF obtained from laboratory measurements of actively induced and solar-corrected fluorescence (SCF) emissions at the ChlF peaks (SCF685, SCF740) was determined for leaves of these tree species and three other species (corn, Zea mays L; green pepper, Capsicum annuum L; and soybean, Glycine max L.). For the trees, leaf-level estimates were determined at the SIF wavelengths (SCF688, SCF760) and compared with canopy field retrievals (SIF688, SIF760). The red ChlF values from leaf and canopy (SCF688 vs. SIF688) were similar, but SCF760 was ~4 times higher than SIF760; consequently, considerably (~5X) higher red/far-red ratios (SIF688/760) resulted for tree canopies as compared to individual tree leaves. The 2006 tree leaf and canopy SIF measurements were also compared with leaf-level SIF estimates derived using FluorMOD, a radiative transfer model that simulates F properties of foliage, utilizing our supporting leaf and environmental measurements as model inputs. The preliminary FluorMOD red and far-red SIF estimates were higher than our field measurements and higher than the laboratory estimates (except for far-red F). SIF of tree foliage was also compared with similar estimates made over corn crops under N treatments. These results will assist in determining the expected SIF intensity of vegetation's near- surface signal associated with O₂ alpha and O₂ beta.en_US
dc.description.urihttps://ieeexplore.ieee.org/document/4423661en_US
dc.format.extent5 pagesen_US
dc.genreconference papers and proceedingsen_US
dc.identifierdoi:10.13016/m2wakn-bqlw
dc.identifier.citationE. M. Middleton, L. A. Corp and P. K. E. Campbell, "Canopy level solar induced fluorescence for vegetation in controlled experiments," 2007 IEEE International Geoscience and Remote Sensing Symposium, Barcelona, Spain, 2007, pp. 3760-3764, doi: 10.1109/IGARSS.2007.4423661.en_US
dc.identifier.urihttps://doi.org/10.1109/IGARSS.2007.4423661
dc.identifier.urihttp://hdl.handle.net/11603/28653
dc.language.isoen_USen_US
dc.publisherIEEEen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Joint Center for Earth Systems Technology
dc.relation.ispartofUMBC GESTAR II
dc.relation.ispartofUMBC Geography and Environmental Systems Department
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.en_US
dc.rightsPublic Domain Mark 1.0*
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/*
dc.titleCanopy level solar induced fluorescence for vegetation in controlled experimentsen_US
dc.typeTexten_US
dcterms.creatorhttps://orcid.org/0000-0002-0505-4951en_US

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Canopy_level_solar_induced_fluorescence_for_vegetation_in_controlled_experiments.pdf
Size:
1.39 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
2.56 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

UMBC Joint Center for Earth Systems Technology (JCET)
UMBC Faculty Collection
UMBC Geography and Environmental Systems Department
UMBC GESTAR II