Deriving chlorophyll fluorescence emissions of vegetation canopies from high resolution field reflectance spectra

dc.contributor.authorMiddleton, Elizabeth M.
dc.contributor.authorCorp, Lawrence A.
dc.contributor.authorDaughtry, Craig S.T.
dc.contributor.authorCampbell, Petya Entcheva
dc.contributor.authorButcher, L. Maryn
dc.date.accessioned2023-07-13T18:52:48Z
dc.date.available2023-07-13T18:52:48Z
dc.date.issued2005-11-08
dc.descriptionOptics East 2005, 2005, Boston, MA, United Statesen_US
dc.description.abstractFluorescence of foliage in the laboratory has proven more rigorous than reflectance for correlation to plant physiology. Especially useful are emissions produced from two stable red and far-red chlorophyll fluorescence (ChlF) peaks centered at 685 nm and 735 nm. Methods have been developed elsewhere to extract steady state solar induced fluorescence (SIF) from apparent reflectance of vegetation canopies/landscapes using the Fraunhofer Line Depth (FLD) principal. Our study utilized these methods in conjunction with field-acquired high spectral resolution canopy reflectance spectra obtained in 2004 and 2005 over corn crops and small tree plots of three deciduous species (red maple, tulip poplar, sweet gum). Leaf level measurements were also made of foliage which included ChlF, photosynthesis, and leaf constituents (photosynthetic pigment, carbon (C), and nitrogen (N) contents). As part of ongoing experiments, measurements were made on N application plots within corn (280, 140, 70, and 0 kg N/ha) and tree (0, 37.5, 75, 112.5, 150 kg N /ha) sites at the USDA/Agriculture Research Service in Beltsville, MD. SIF intensities for ChlF were derived directly from canopy reflectance spectra in specific narrow- band regions associated with atmospheric oxygen absorption features centered at 688 and 760 nm. The red/far-red SIF ratio (SIFratio) derived from these field reflectance spectra successfully discriminated foliar pigment ratios altered by N application rates in both corn crops. This ratio was also positively correlated to the C/N ratio at leaf and canopy levels, for the available corn data (e.g., 2004). No consistent N treatment or species differences in SIF were detected in the tree foliage, but additional 2005 data are forthcoming. This study has relevance to future passive satellite remote sensing approaches to monitoring C dynamics from space.en_US
dc.description.sponsorshipThe authors thank James E. McMurtrey (USDA, retired), Andrew Russ (USDA), and Matthew Greenwood (SSAI) for assistance with data collections/processing. This research was funded by the NASA Terrestrial Ecosystem Program.en_US
dc.description.urihttps://www.spiedigitallibrary.org/conference-proceedings-of-spie/5996/1/Deriving-chlorophyll-fluorescence-emissions-of-vegetation-canopies-from-high-resolution/10.1117/12.631159.short?SSO=1en_US
dc.format.extent11 pagesen_US
dc.genreconference papers and proceedingsen_US
dc.identifierdoi:10.13016/m2vdxk-ipds
dc.identifier.citationElizabeth M. Middleton, Lawrence A. Corp, Craig S.T. Daughtry, Petya K. Entcheva Campbell, and L. Maryn Butcher "Deriving chlorophyll fluorescence emissions of vegetation canopies from high resolution field reflectance spectra", Proc. SPIE 5996, Optical Sensors and Sensing Systems for Natural Resources and Food Safety and Quality, 599607 (8 November 2005); https://doi.org/10.1117/12.631159en_US
dc.identifier.urihttps://doi.org/10.1117/12.631159
dc.identifier.urihttp://hdl.handle.net/11603/28658
dc.language.isoen_USen_US
dc.publisherSPIEen_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.titleDeriving chlorophyll fluorescence emissions of vegetation canopies from high resolution field reflectance spectraen_US
dc.typeTexten_US
dcterms.creatorhttps://orcid.org/0000-0002-0505-4951en_US

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