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Multiangular Observation of Canopy Sun-Induced Chlorophyll Fluorescence by Combining Imaging Spectroscopy and Stereoscopy

Francisco Pinto, Mark Müller-Linow, Anke Schickling, M. Cendrero-Mateo, Agim Ballvora, Uwe Rascher
2017 Remote Sensing  
The effect that the canopy structure and the viewing geometry have on the intensity and the spatial distribution of passively measured sun-induced chlorophyll fluorescence at canopy scale is still not  ...  leaves and the fluorescence emission of each leaf which is modulated by the exposure of the individual leaf patch to the incoming light and the functional status of photosynthesis.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/rs9050415 fatcat:rjv6gvres5ewthia37z4mgmz44

A new instrument for passive remote sensing: 2. Measurement of leaf and canopy reflectance changes at 531 nm and their relationship with photosynthesis and chlorophyll fluorescence

S EVAIN
2004 Remote Sensing of Environment  
The utility of this remote sensing technique to measure the Physiological Reflectance Index (PRI) is shown at both leaf level under laboratory conditions and at the canopy level in the field.  ...  The robustness of this relationship by simultaneous remote sensing of PRI and chlorophyll fluorescence is strengthened.  ...  The relationship between PRI measured at the canopy level and NPQ measured on a single leaf of those included in the PRI spot, from field experiments.  ... 
doi:10.1016/s0034-4257(04)00074-4 fatcat:fbraauhzkraohngqhc63kpgxpi

A new instrument for passive remote sensing: 2. Measurement of leaf and canopy reflectance changes at 531 nm and their relationship with photosynthesis and chlorophyll fluorescence

S EVAIN
2004 Remote Sensing of Environment  
The utility of this remote sensing technique to measure the Physiological Reflectance Index (PRI) is shown at both leaf level under laboratory conditions and at the canopy level in the field.  ...  The robustness of this relationship by simultaneous remote sensing of PRI and chlorophyll fluorescence is strengthened.  ...  The relationship between PRI measured at the canopy level and NPQ measured on a single leaf of those included in the PRI spot, from field experiments.  ... 
doi:10.1016/j.rse.2004.03.012 fatcat:dcfhneuklfcpjffdmm7tgbxpke

Detection of diurnal variation in orchard canopy water content using MODIS/ASTER airborne simulator (MASTER) data

Tao Cheng, David Riaño, Alexander Koltunov, Michael L. Whiting, Susan L. Ustin, Jenna Rodriguez
2013 Remote Sensing of Environment  
to the field-measured CWC.  ...  Retrievals of vegetation canopy water content (CWC) from remotely sensed imagery can improve our understanding of the water cycle and help manage irrigation of agricultural crops.  ...  (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.) three types of CWC: the field-measured CWC and the CWC estimated by the  ... 
doi:10.1016/j.rse.2012.12.024 fatcat:5cv6dtwcvbhkxatbav5642at24

Reviews and Syntheses: optical sampling of the flux tower footprint

J. A. Gamon
2015 Biogeosciences  
New interpretations of established optical sampling methods, including the photochemical reflectance index (PRI) and solar-induced chlorophyll fluorescence (SIF), are discussed within the context of the  ...  Proper analysis of the sampling scale requires an awareness of sampling context that is often essential to the proper interpretation of optical signals.  ...  This work has been made possible by support from NSF, NASA, NSERC, CCSIP, CFI, iCORE/AITF, and the Rangeland Research Institute (University of Alberta). Edited by: A.  ... 
doi:10.5194/bg-12-4509-2015 fatcat:ajvcfenahnb55ht7srdpc2f7be

Linking canopy reflectance to crop structure and photosynthesis to capture and interpret spatiotemporal dimensions of per-field photosynthetic productivity

Wei Xue, Seungtaek Jeong, Jonghan Ko, John Tenhunen
2016 Biogeosciences Discussions  
traits quantified at plot level by portable chamber systems, was applied to capture and interpret inter- and intra-field variations in gross primary productivity (GPP) in lowland rice grown under flooded  ...  A data assimilation, where close-range remote sensing measurements of vegetation indices derived from a hand-held instrument and an unmanned aerial vehicle (UAV) system are linked to leaf and canopy photosynthetic  ...  We gratefully acknowledge the technical assistance of Margarete Wartinger for all her support in the field and laboratory. Edited by: P. Stoy Reviewed by: two anonymous referees  ... 
doi:10.5194/bg-2016-492 fatcat:e7hatlsg6zfibpswwdohwy3p5y

Linking canopy reflectance to crop structure and photosynthesis to capture and interpret spatiotemporal dimensions of per-field photosynthetic productivity

Wei Xue, Seungtaek Jeong, Jonghan Ko, John Tenhunen
2017 Biogeosciences  
A data fitting, where close-range remote-sensing measurements of vegetation indices derived from a handheld instrument and an unmanned aerial vehicle (UAV) system are linked to in situ leaf and canopy  ...  Nevertheless, nitrogen addition effects on SV of LUE<sub>cabs</sub> at the early growth stage made PD fields exert greater SVs than RF fields.  ...  We gratefully acknowledge the technical assistance of Margarete Wartinger for all her support in the field and laboratory. Edited by: P. Stoy Reviewed by: two anonymous referees  ... 
doi:10.5194/bg-14-1315-2017 fatcat:iznst47zsfaardmsfmyq75nylq

A Spectral Fitting Algorithm to Retrieve the Fluorescence Spectrum from Canopy Radiance

Sergio Cogliati, Marco Celesti, Ilaria Cesana, Franco Miglietta, Lorenzo Genesio, Tommaso Julitta, Dirk Schuettemeyer, Matthias Drusch, Uwe Rascher, Pedro Jurado, Roberto Colombo
2019 Remote Sensing  
The reliability of the retrieval algorithm on experimental measurements is evaluated by cross-comparison with F values computed by an independent retrieval method (i.e., SFM at O2 bands).  ...  Further, the algorithm is employed to process experimental field spectroscopy measurements collected over different crops during a long-lasting field campaign.  ...  We also thank you Fondazione per il Clima e la Sostenibilità (FCS) for field work and Giulio Borgia owner of Azienda Agricola Le Rogaie for hosting the field experiments.  ... 
doi:10.3390/rs11161840 fatcat:px7tgj3ycjgxtjqymbfqzsyibq

A new instrument for passive remote sensing1. Measurements of sunlight-induced chlorophyll fluorescence

I MOYA
2004 Remote Sensing of Environment  
An instrument measuring the in-filling of the atmospheric oxygen absorption band at 760 nm by chlorophyll fluorescence has been designed and constructed at the "Laboratoire pour l'Utilisation du Rayonnement  ...  A good agreement was found between gas exchange and variable chlorophyll fluorescence at the canopy level and variable fluorescence at the leaf level.  ...  Acknowledgements We wish to acknowledge the support of the CNRS through the GDR 1536 ''FLUOVEG''. LURE projects BF 026-98 and BF 024-99 are also acknowledged. S.  ... 
doi:10.1016/s0034-4257(04)00075-6 fatcat:sbuwagaqnzekjkxrdgwrgw2ybm

A new instrument for passive remote sensing1. Measurements of sunlight-induced chlorophyll fluorescence

I MOYA
2004 Remote Sensing of Environment  
An instrument measuring the in-filling of the atmospheric oxygen absorption band at 760 nm by chlorophyll fluorescence has been designed and constructed at the "Laboratoire pour l'Utilisation du Rayonnement  ...  A good agreement was found between gas exchange and variable chlorophyll fluorescence at the canopy level and variable fluorescence at the leaf level.  ...  Acknowledgements We wish to acknowledge the support of the CNRS through the GDR 1536 ''FLUOVEG''. LURE projects BF 026-98 and BF 024-99 are also acknowledged. S.  ... 
doi:10.1016/j.rse.2004.02.012 fatcat:kmc6jayhj5hjhgowxelz5q7aie

Physiological responses of three deciduous conifers (Metasequoia glyptostroboides, Taxodium distichum and Larix laricina) to continuous light: adaptive implications for the early Tertiary polar summer

M. A. Equiza, M. E. Day, R. Jagels
2006 Tree Physiology  
This difference in carbon allocation may have provided Metasequoia with a two fold advantage in the paleoarctic by minimizing depression of photosynthetic capacity and increasing photosynthetic surface  ...  With a winter of total or near darkness and a summer of continuous, low-angle illumination, these temperate, high-latitude forests were characterized by a light regime without a contemporary counterpart  ...  This research was funded by a grant from The Andrew W. Mellon Foundation to R.J. and M.E.D. and USDA McIntire-Stennis support for R.J.  ... 
doi:10.1093/treephys/26.3.353 pmid:16356906 fatcat:l4bui5hdprc5zmpb6ixgmczqte

Dynamics of ammonia exchange with cut grassland: strategy and implementation of the GRAMINAE Integrated Experiment

M. A. Sutton, E. Nemitz, M. R. Theobald, C. Milford, J. R. Dorsey, M. W. Gallagher, A. Hensen, P. A. C. Jongejan, J. W. Erisman, M. E. Mattsson, J. K. Schjoerring, P. Cellier (+12 others)
2008 Biogeosciences Discussions  
NH 3 fluxes with the canopy by a range of micrometeorological measurements, c) analysis of the sources and sinks of NH 3 within the plant canopy, including soils and bioassay measurements, d) comparison  ...  The measurements were made at 7 measurement locations, thereby quantifying horizontal and vertical profiles, and covered three phases: a) tall grass canopy prior to cutting (7 days), b) short grass after  ...  The measurements were conducted under the frame of the GRAMINAE project funded by the European Commission (DG Research), with input from a wide range of national funding agencies, in particular the UK  ... 
doi:10.5194/bgd-5-3347-2008 fatcat:mx2r7fpfqra25m2meybjfsttk4

Dynamics of ammonia exchange with cut grassland: strategy and implementation of the GRAMINAE Integrated Experiment

M. A. Sutton, E. Nemitz, M. R. Theobald, C. Milford, J. R. Dorsey, M. W. Gallagher, A. Hensen, P. A. C. Jongejan, J. W. Erisman, M. Mattsson, J. K. Schjoerring, P. Cellier (+12 others)
2009 Biogeosciences  
NH 3 fluxes with the canopy by a range of micrometeorological measurements, c) analysis of the sources and sinks of NH 3 within the plant canopy, including soils and bioassay measurements, d) comparison  ...  The measurements were made at 7 measurement locations, thereby quantifying horizontal and vertical profiles, and covered three phases: a) tall grass canopy prior to cutting (7 days), b) short grass after  ...  The measurements were conducted under the frame of the GRAMINAE project funded by the European Commission (DG Research), with input from a wide range of national funding agencies, in particular the UK  ... 
doi:10.5194/bg-6-309-2009 fatcat:3zohmabmzjglxbgoueuovjxpl4

Spectral Network (SpecNet)—What is it and why do we need it?

J GAMON, A RAHMAN, J DUNGAN, M SCHILDHAUER, K HUEMMRICH
2006 Remote Sensing of Environment  
SpecNet (Spectral Network) is an international network of cooperating investigators and sites linking optical measurements with flux sampling for the purpose of improving our understanding of the controls  ...  Effective integration of optical remote sensing with flux measurements across multiple scales is essential for understanding global patterns of surface-atmosphere fluxes of carbon and water vapor.  ...  Acknowledgements The SpecNet Working Group was made possible by a grant from the National Center for Ecological Analysis and Synthesis (NCEAS).  ... 
doi:10.1016/j.rse.2006.04.003 fatcat:d5iaizyq3bgenoxlah4brczorq

3D Laser Triangulation for Plant Phenotyping in Challenging Environments

Katrine Kjaer, Carl-Otto Ottosen
2015 Sensors  
To increase the understanding of how the plant phenotype is formed by genotype and environmental interactions, simple and robust high-throughput plant phenotyping methods should be developed and considered  ...  Our results demonstrate the high potential of 3D laser triangulation for simple measurements of phenotypic variation in challenging environments and in a high temporal resolution.  ...  This research was supported by The Danish Research Council for Technology and Production (#10-092852) and the European Plant Phenotyping Network (EPPN, grant No. 284443).  ... 
doi:10.3390/s150613533 pmid:26066990 pmcid:PMC4507705 fatcat:o63tamtmxvgpjkqnhbj3gne6xu
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